Robert Byer
William R. Kenan, Jr. Professor, Emeritus
Applied Physics
Bio
Robert L. Byer has served as President of The American Physical Society, of the Optical Society of America and of the IEEE LEOS. He has served as Vice Provost and Dean of Research at Stanford. He has been Chair of the Department of Applied Physics, Director of the Edward L. Ginzton Laboratory and Director of the Hansen Experimental Physics Laboratory. He is a founding member of the California Council on Science and Technology and served as Chair from 1995-1999. He was a member of the Air Force Scientific Advisory Board from 2002-2006 and has been a member of the National Ignition Facility since 2000.
Robert L. Byer has conducted research and taught classes in lasers and nonlinear optics at Stanford University since 1969. He has made extraordinary contributions to laser science and technology including the demonstration of the first tunable visible parametric oscillator, the development of the Q-switched unstable resonator Nd:YAG laser, remote sensing using tunable infrared sources and precision spectroscopy using Coherent Anti Stokes Raman Scattering (CARS). Current research includes precision laser measurements in support of the detection of gravitational waves and laser “Accelerator on a chip”.
Administrative Appointments
-
Director, Edward L. Ginzton Laboratory (2006 - 2009)
-
Co-Director, Stanford Photonics Research Center (2000 - Present)
-
Chair, Department of Applied Physics (2000 - 2002)
-
Director, Hansen Experimental Physics Laboratory (1997 - 2006)
-
Director, Center for Nonlinear Optical Materials (1992 - 2000)
-
Dean of Research / Vice Provost, Stanford University (1987 - 1992)
-
Associate Dean of Humanities and Sciences, Stanford University (1984 - 1986)
-
Chair, Department of Applied Physics (1981 - 1984)
-
Professor, Department of Applied Physics (1979 - Present)
-
Associate Professor, Department of Applied Physics (1974 - 1979)
-
Assistant Professor, Department of Applied Physics (1969 - 1974)
Honors & Awards
-
Charter Fellow, National Academy of Inventors (2012)
-
Frederic Ives Medal/Jarvis W. Quinn Prize, Optical Society of America (2009)
-
Photonics Award, Institute of Electrical and Electronics Engineers (2009)
-
Willis E. Lamb Award for Laser Science and Quantum Optics, Physics of Quantum Electronics (2009)
-
Distinction in Photonics Award, Spectra Photonics (2004)
-
3rd Millennium Medal, Institute of Electrical and Electronics Engineers (2000)
-
Fellow, California Council on Science and Technology (1999)
-
A.L. Schawlow Award, Laser Institute of America (1998)
-
Fellow, Laser Institute of America (1998)
-
R.W. Wood Prize, Optical Society of America (1998)
-
Quantum Electronics Award, Lasers and Electro-Optics Society (1996)
-
Fellow, American Physical Society (1992)
-
Fellow, American Association for the Advancement of Science (1992)
-
Fellow, Lasers and Electro-optics Society of the IEEE (1987)
-
R.V. Pole Memorial Lecture, Conference on Lasers and Electro-Optics (1987)
-
Fellow, Optical Society of America (1976)
-
Adolph Lomb Medal, Optical Society of America (1972)
-
Fellow, I.B.M. (1969)
Boards, Advisory Committees, Professional Organizations
-
President, American Physical Society (2012 - 2013)
-
Vice President, American Physical Society (2011 - 2012)
-
Chair, California Council on Science and Technology (1995 - 1998)
-
President, Optical Society of America (1994 - 1995)
-
President, Lasers and Electro-Optics Society of the IEEE (1984 - 1985)
Patents
-
Konstantin L. Vodopyanov, Samuel T. Wong, Robert L. Byer. "United States Patent 8,384,990 Infrared frequency comb methods, arrangements and applications", Feb 26, 2013
-
Robert L. Byer, Tomas Plettner. "United States Patent 7,994,472 Laser-driven deflection arrangements and methods involving charged particle beams", Aug 9, 2011
-
Brett A. Allard, Saps Buchman, Robert L. Byer, Ke-Xun Sun. "United States Patent 7,751,170 Charge management of electrically isolated objects via modulated photoelectric charge transfer", Jul 6, 2010
-
Robert L. Byer, Michel J.F. Digonnet, Jens Limpert, Supriyo Sinha. "United States Patent 7,477,672 Mitigation of photodarkening to achieve laser oscillation and amplification with highly doped fibers", Jan 13, 2009
-
Graham S. Allen, Robert L. Byer, Ke-Xun Sun. "United States Patent 7,414,730 High precision interferometer apparatus employing a grating beamsplitter", Aug 19, 2008
-
Robert L. Byer, Shailendhar Saraf, Arun Kumar Sridharan. "United States Patent 7,087,447 Method for fabricating zig-zag slabs for solid state lasers", Aug 8, 2006
-
Martin M. Fejer, Gregory D. Miller, Robert G. Batchko, Robert L. Byer. "United States Patent 6,555,293 Method for fabricating efficient sources of electromagnetic radiation", Apr 29, 2003
-
Robert L. Byer, Martin M. Fejer, Gregory D. Miller, Lawrence E. Myers. "United States Patent 6,156,255 Electric field domain patterning", Dec 5, 2000
-
Robert L. Byer, Todd Rutherford, William Tulloch. "United States Patent 6,134,258 Transverse-pumped slab laser/amplifier", Oct 17, 2000
-
Robert L. Byer, Justin D. Mansell. "United States Patent 6,108,121 Micromachined high reflectance deformable mirror", Aug 22, 2000
-
Robert L. Byer, Robert C. Eckardt, Martin M. Fejer, Lawrence E. Myers. "United States Patent 6,064,512 Patterned poled structure devices having increased aperture size, increased power handling and three dimensional patterning capabilities", May 16, 2000
-
Robert L. Byer, Martin M. Fejer, Eric J. Lim. "United States Patent 5,838,702 Method of electrically controlling regions of ferroelectric polarization domains in solid state bodies", Nov 17, 1998
-
Robert L. Byer, Martin M. Fejer, Eric J. Lim. "United States Patent 5,714,198 Method of controlling regions of ferroelectric polarization domains in solid state bodies", Feb 3, 1998
-
Robert L. Byer, Martin M. Fejer, Eric J. Lim. "United States Patent 5,714,198 Method of controlling regions of ferroelectric polarization domains in solid state bodies", Feb 3, 1998
-
Robert L. Byer. "United States Patent 5,673,281 Solid state system for frequency conversion using raman-active media and non-linear media", Sep 30, 1997
-
Anthony J. Alfrey, Robert L. Byer, Robert J. Shine Jr.. "United States Patent 5,479,430 Protective coating for solid state slab lasers", Dec 26, 1995
-
Robert L. Byer, Martin M. Fejer, Leslie A. Gordon. "United States Patent 5,475,526 Method using a monolithic crystalline material for producing radiation by quasi-phase-matching, diffusion bonded monolithic crystalline material for quasi-phase-matching, and method for fabricating same", Dec 12, 1995
-
Robert L. Byer, Martin M. Fejer, Leslie A. Gordon. "United States Patent 5,355,247 Method using a monolithic crystalline material for producing radiation by quasi-phase-matching, diffusion bonded monolithic crystalline material for quasi-phase-matching, and method for fabricating same", Oct 11, 1994
-
Robert L. Byer, Martin M. Fejer, Stephan Schiller, Andreas Sizmann. "United States Patent 5,227,911 Monolithic total internal reflection optical resonator", Jul 13, 1993
-
Robert L. Byer, Martin M. Fejer, Gregory A. Magel. "United States Patent 5,171,400 Method of producing crystalline rods having regions of reversed dominant ferroelectric polarity and method for clarifying such a rod", Dec 15, 1992
-
Robert L. Byer, Amado Cordova, Michael Digonnet, Martin Fejer, Celestino Gaeta, Herbert J. Shaw, Shoichi Sudo. "United States Patent 5,077,087 Method of cladding single crystal optical fiber", Dec 31, 1991
-
Robert L. Byer, Alan C. Nilsson. "United States Patent 5,043,996 Monlithic nonplanar ring oscillator and method", Aug 27, 1991
-
Amado Cordova, Robert L. Byer, Michael Digonnet, Martin M. Fejer, Celestino Gaeta, Herbert J. Shaw, Shoichi Sudo. "United States Patent 5,037,181 Claddings for single crystal optical fibers and devices and methods and apparatus for making such claddings", Aug 6, 1991
-
Robert L. Byer, Martin M. Fejer, Eric J. Lim. "United States Patent 5,036,220 Nonlinear optical radiation generator and method of controlling regions of ferroelectric polarization domains in solid state bodies", Jul 30, 1991
-
Robert L. Byer, C. David Nabors. "United States Patent 5,027,360 High power continuous wave injection-locked solid state laser", Jun 25, 1991
-
Robert L. Byer, William J. Kozlovsky, Charles D. Nabors. "United States Patent 5,027,361 Efficient laser harmonic generation employing a low-loss external optical resonator", Jun 25, 1991
-
Santanu Basu, Robert L. Byer. "United States Patent 4,951,294 Diode pumped modelocked solid state laser", Aug 21, 1990
-
Santanu Basu, Robert L. Byer. "United States Patent 4,914,663 Generation of short high peak power pulses from an injection mode-locked Q-switched laser oscillator", Apr 3, 1990
-
Robert L. Byer, Thomas J. Kane. "United States Patent 4,902,127 Eye-safe coherent laser radar", Feb 20, 1990
-
Santanu Basu, Robert L. Byer. "United States Patent 4,890,289 Fiber coupled diode pumped moving solid state laser", Dec 26, 1989
-
Robert L. Byer, Martin M. Fejer. "United States Patent 4,880,297 Quantum well optical electric field biased nonlinear method and apparatus", Nov 14, 1989
-
Robert L. Byer, Tso Y. Fan. "United States Patent 4,860,295 Cladding for transverse-pumped solid-state laser", Aug 22, 1989
-
Santanu Basu, Robert L. Byer. "United States Patent 4,833,682 Moving slab laser", May 23, 1989
-
Robert L. Byer, Tso Y. Fan. "United States Patent 4,809,291 Diode pumped laser and doubling to obtain blue light", Feb 28, 1989
-
Robert L. Byer, Tso Y. Fan, William J. Kozlovsky. "United States Patent 4,764,933 Diode pumped low doped Nd3+ glass laser", Aug 16, 1988
-
Robert L. Byer, George J. Dixon, Thomas J. Kane. "United States Patent 4,739,507 Diode end pumped laser and harmonic generator using same", Apr 19, 1988
-
Robert L. Byer, Tso Y. Fan. "United States Patent 4,731,787 Monolithic phasematched laser harmonic generator", Mar 15, 1988
-
Robert L. Byer, Tso Y. Fan. "United States Patent 4,701,928 Diode laser pumped co-doped laser", Oct 20, 1987
-
Robert L. Byer, Martin M. Fejer, Gregory A. Magel. "United States Patent 4,650,322 Method and means for high resolution measurement of fiber diameter", Mar 17, 1987
-
Robert L. Byer, Martin M. Fejer, John L. Nightingale. "United States Patent 4,607,776 Apparatus for translating crystal fibers", Aug 26, 1986
-
Robert L. Byer, Thomas J. Kane. "United States Patent 4,578,793 Solid-state non-planar internally reflecting ring laser", Mar 25, 1986
-
Robert L. Byer. "United States Patent 4,555,786 High power solid state laser", Nov 26, 1985
-
Robert L. Byer. "United States Patent 4,455,657 Stable single axial mode Q switched laser oscillator with injection locking", Jun 19, 1984
-
Robert L. Byer, Edward R. Murray, Arne Rosengreen, Jan E. van der Laan. "United States Patent 4,450,356 Frequency-mixed CO2 laser radar for remote detection of gases in the atmosphere", May 22, 1984
-
Robert L. Byer, Martin M. Fejer. "United States Patent 4,421,721 Apparatus for growing crystal fibers", Dec 20, 1983
-
Keith E. Bennett, Robert L. Byer. "United States Patent 4,398,806 Broadband variable optical attenuator", Aug 16, 1983
-
Robert L. Byer. "United States Patent 4,386,854 Method and means for optically generating signals for use in monitoring an environment using tomographic techniques", Jun 7, 1983
-
Robert L. Byer, John M. Eggleston III. "United States Patent 4,378,601 Slab and holder for face pumped slab laser", Mar 29, 1983
-
Roger T. Boos, Robert L. Byer, Richard K. DeFreez, Walter D. Egan. "United States Patent 4,362,388 Remote measurement of concentration of a gas specie by resonance absorption", Dec 7, 1982
-
Robert L. Byer, Richard L. Herbst. "United States Patent 4,310,808 High power laser employing an unstable resonator", Jan 12, 1982
-
Robert L. Byer, Richard L. Herbst. "United States Patent 4,213,060 Tunable infrared source employing Raman mixing", Jul 15, 1980
-
Robert L. Byer, Jeffrey A. Paul. "United States Patent 4,172,663 Optical wavelength meter", Oct 30, 1979
-
Robert L. Byer, Richard L. Herbst. "United States Patent 3,922,561 Tunable electromagnetic oscillator using [01.4] grown LiNbO3 and method", Nov 25, 1975
2023-24 Courses
-
Independent Studies (4)
- Curricular Practical Training
APPPHYS 291 (Sum) - Directed Studies in Applied Physics
APPPHYS 290 (Aut, Win, Spr, Sum) - Independent Research and Study
PHYSICS 190 (Aut, Win, Spr, Sum) - Research
PHYSICS 490 (Aut, Win, Spr, Sum)
- Curricular Practical Training
Stanford Advisees
-
Postdoctoral Faculty Sponsor
Edgard Bonilla -
Doctoral (Program)
Griffin Glenn, Tamra Nebabu
All Publications
-
High gradient silicon carbide immersion lens ultrafast electron sources
JOURNAL OF APPLIED PHYSICS
2022; 131 (13)
View details for DOI 10.1063/5.0086321
View details for Web of Science ID 000788718800005
-
Quantum Nature of Dielectric Laser Accelerators
PHYSICAL REVIEW X
2021; 11 (4)
View details for DOI 10.1103/PhysRevX.11.041042
View details for Web of Science ID 000726717900001
-
Electron Pulse Compression with Optical Beat Note.
Physical review letters
2021; 127 (16): 164802
Abstract
Compressing electron pulses is important in many applications of electron beam systems. In this study, we propose to use optical beat notes to compress electron pulses. The beat frequency is chosen to match the initial electron pulse duration, which enables the compression of electron pulses with a wide range of durations. This functionality extends the optical control of electron beams, which is important in compact electron beam systems such as dielectric laser accelerators. We also find that the dominant frequency of the electron charge density changes continuously along its drift trajectory, which may open up new opportunities in coherent interaction between free electrons and quantum or classical systems.
View details for DOI 10.1103/PhysRevLett.127.164802
View details for PubMedID 34723609
-
Microchip accelerators
PHYSICS TODAY
2021; 74 (8): 42-49
View details for DOI 10.1063/PT.3.4815
View details for Web of Science ID 000680100000013
-
A compact electron source for the dielectric laser accelerator
APPLIED PHYSICS LETTERS
2020; 116 (16)
View details for DOI 10.1063/5.0003575
View details for Web of Science ID 000529892900002
-
On-chip integrated laser-driven particle accelerator.
Science (New York, N.Y.)
2020; 367 (6473): 79–83
Abstract
Particle accelerators represent an indispensable tool in science and industry. However, the size and cost of conventional radio-frequency accelerators limit the utility and reach of this technology. Dielectric laser accelerators (DLAs) provide a compact and cost-effective solution to this problem by driving accelerator nanostructures with visible or near-infrared pulsed lasers, resulting in a 104 reduction of scale. Current implementations of DLAs rely on free-space lasers directly incident on the accelerating structures, limiting the scalability and integrability of this technology. We present an experimental demonstration of a waveguide-integrated DLA that was designed using a photonic inverse-design approach. By comparing the measured electron energy spectra with particle-tracking simulations, we infer a maximum energy gain of 0.915 kilo-electron volts over 30 micrometers, corresponding to an acceleration gradient of 30.5 mega-electron volts per meter. On-chip acceleration provides the possibility for a completely integrated mega-electron volt-scale DLA.
View details for DOI 10.1126/science.aay5734
View details for PubMedID 31896715
-
Net Acceleration and Direct Measurement of Attosecond Electron Pulses in a Silicon Dielectric Laser Accelerator.
Physical review letters
2019; 123 (26): 264802
Abstract
Net acceleration of attosecond-scale electron pulses is critical to the development of on-chip accelerators. We demonstrate a silicon-based laser-driven two-stage accelerator as an injector stage prototype for a Dielectric Laser Accelerator (DLA). The first stage converts a 57-keV (500±100)-fs (FWHM) electron pulse into a pulse train of 700±200 as (FWHM) microbunches. The second stage harnesses the tunability of dual-drive DLA to perform both a net acceleration and a streaking measurement. In the acceleration mode, the second stage increases the net energy of the electron pulse by 200 eV over 12.25 μm. In the deflection mode, the microbunch temporal profile is analyzed by a direct streaking measurement with 200 as resolution. This work provides a demonstration of a novel, on-chip method to access the attosecond regime, opening new paths towards attosecond science using DLA.
View details for DOI 10.1103/PhysRevLett.123.264802
View details for PubMedID 31951436
-
Net Acceleration and Direct Measurement of Attosecond Electron Pulses in a Silicon Dielectric Laser Accelerator
PHYSICAL REVIEW LETTERS
2019; 123 (26)
View details for DOI 10.1103/PhysRevLett.123.264802
View details for Web of Science ID 000504647800005
-
Laser-Driven Electron Lensing in Silicon Microstructures
PHYSICAL REVIEW LETTERS
2019; 122 (10)
View details for DOI 10.1103/PhysRevLett.122.104801
View details for Web of Science ID 000461069000004
-
Elements of a dielectric laser accelerator
OPTICA
2018; 5 (6): 687–90
View details for DOI 10.1364/OPTICA.5.000687
View details for Web of Science ID 000435967000004
-
Phase-dependent laser acceleration of electrons with symmetrically driven silicon dual pillar gratings
OPTICS LETTERS
2018; 43 (9): 2181–84
Abstract
We present the demonstration of phase-dependent laser acceleration and deflection of electrons using a symmetrically driven silicon dual pillar grating structure. We show that exciting an evanescent inverse Smith-Purcell mode on each side of a dual pillar grating can produce hyperbolic cosine acceleration and hyperbolic sine deflection modes, depending on the relative excitation phase of each side. Our devices accelerate sub-relativistic 99.0 keV kinetic energy electrons by 3.0 keV over a 15 μm distance with accelerating gradients of 200 MeV/m with 40 nJ, 300 fs, 1940 nm pulses from an optical parametric amplifier. These results represent a significant step towards making practical dielectric laser accelerators for ultrafast, medical, and high-energy applications.
View details for DOI 10.1364/OL.43.002181
View details for Web of Science ID 000431179400061
View details for PubMedID 29714784
-
A fully programmable 100-spin coherent Ising machine with all-to-all connections.
Science
2016; 354 (6312): 614-617
Abstract
Unconventional, special-purpose machines may aid in accelerating the solution of some of the hardest problems in computing, such as large-scale combinatorial optimizations, by exploiting different operating mechanisms than those of standard digital computers. We present a scalable optical processor with electronic feedback that can be realized at large scale with room-temperature technology. Our prototype machine is able to find exact solutions of, or sample good approximate solutions to, a variety of hard instances of Ising problems with up to 100 spins and 10,000 spin-spin connections.
View details for PubMedID 27811274
-
GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
PHYSICAL REVIEW LETTERS
2016; 116 (24)
Abstract
We report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with a network signal-to-noise ratio of 13 and a significance greater than 5σ. The signal persisted in the LIGO frequency band for approximately 1 s, increasing in frequency and amplitude over about 55 cycles from 35 to 450 Hz, and reached a peak gravitational strain of 3.4_{-0.9}^{+0.7}×10^{-22}. The inferred source-frame initial black hole masses are 14.2_{-3.7}^{+8.3}M_{⊙} and 7.5_{-2.3}^{+2.3}M_{⊙}, and the final black hole mass is 20.8_{-1.7}^{+6.1}M_{⊙}. We find that at least one of the component black holes has spin greater than 0.2. This source is located at a luminosity distance of 440_{-190}^{+180} Mpc corresponding to a redshift of 0.09_{-0.04}^{+0.03}. All uncertainties define a 90% credible interval. This second gravitational-wave observation provides improved constraints on stellar populations and on deviations from general relativity.
View details for DOI 10.1103/PhysRevLett.116.241103
View details for PubMedID 27367379
-
Demonstration of acceleration of relativistic electrons at a dielectric microstructure using femtosecond laser pulses.
Optics letters
2016; 41 (12): 2696-2699
Abstract
Acceleration of electrons using laser-driven dielectric microstructures is a promising technology for the miniaturization of particle accelerators. Achieving the desired GV m-1 accelerating gradients is possible only with laser pulse durations shorter than ∼1 ps. In this Letter, we present, to the best of our knowledge, the first demonstration of acceleration of relativistic electrons at a dielectric microstructure driven by femtosecond duration laser pulses. Using this technique, an electron accelerating gradient of 690±100 MV m-1 was measured-a record for dielectric laser accelerators.
View details for DOI 10.1364/OL.41.002696
View details for PubMedID 27304266
-
Properties of the Binary Black Hole Merger GW150914
PHYSICAL REVIEW LETTERS
2016; 116 (24)
Abstract
On September 14, 2015, the Laser Interferometer Gravitational-Wave Observatory (LIGO) detected a gravitational-wave transient (GW150914); we characterize the properties of the source and its parameters. The data around the time of the event were analyzed coherently across the LIGO network using a suite of accurate waveform models that describe gravitational waves from a compact binary system in general relativity. GW150914 was produced by a nearly equal mass binary black hole of masses 36_{-4}^{+5}M_{⊙} and 29_{-4}^{+4}M_{⊙}; for each parameter we report the median value and the range of the 90% credible interval. The dimensionless spin magnitude of the more massive black hole is bound to be <0.7 (at 90% probability). The luminosity distance to the source is 410_{-180}^{+160} Mpc, corresponding to a redshift 0.09_{-0.04}^{+0.03} assuming standard cosmology. The source location is constrained to an annulus section of 610 deg^{2}, primarily in the southern hemisphere. The binary merges into a black hole of mass 62_{-4}^{+4}M_{⊙} and spin 0.67_{-0.07}^{+0.05}. This black hole is significantly more massive than any other inferred from electromagnetic observations in the stellar-mass regime.
View details for DOI 10.1103/PhysRevLett.116.241102
View details for PubMedID 27367378
-
GW150914: First results from the search for binary black hole coalescence with Advanced LIGO
PHYSICAL REVIEW D
2016; 93 (12)
View details for DOI 10.1103/PhysRevD.93.122003
View details for Web of Science ID 000377303700002
-
Observation of Gravitational Waves from a Binary Black Hole Merger
PHYSICAL REVIEW LETTERS
2016; 116 (6)
Abstract
On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10(-21). It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203,000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410(-180)(+160) Mpc corresponding to a redshift z=0.09(-0.04)(+0.03). In the source frame, the initial black hole masses are 36(-4)(+5)M⊙ and 29(-4)(+4)M⊙, and the final black hole mass is 62(-4)(+4)M⊙, with 3.0(-0.5)(+0.5)M⊙c(2) radiated in gravitational waves. All uncertainties define 90% credible intervals. These observations demonstrate the existence of binary stellar-mass black hole systems. This is the first direct detection of gravitational waves and the first observation of a binary black hole merger.
View details for DOI 10.1103/PhysRevLett.116.061102
View details for PubMedID 26918975
-
Dielectric laser acceleration of sub-100 keV electrons with silicon dual-pillar grating structures
OPTICS LETTERS
2015; 40 (18): 4344-4347
Abstract
We present the demonstration of high-gradient laser acceleration and deflection of electrons with silicon dual-pillar grating structures using both evanescent inverse Smith-Purcell modes and coupled modes. Our devices accelerate subrelativistic 86.5 and 96.3 keV electrons by 2.05 keV over 5.6 μm distance for accelerating gradients of 370 MeV/m with a 3 nJ mode-locked Ti:sapphire laser. We also show that dual pillars can produce uniform accelerating gradients with a coupled-mode field profile. These results represent a significant step toward making practical dielectric laser accelerators for ultrafast, medical, and high-energy applications.
View details for DOI 10.1364/OL.40.004344
View details for Web of Science ID 000361556700040
-
Dielectric laser accelerators
REVIEWS OF MODERN PHYSICS
2014; 86 (4): 1337-1389
View details for DOI 10.1103/RevModPhys.86.1337
View details for Web of Science ID 000348365500001
-
Electron beam position monitor for a dielectric microaccelerator
OPTICS LETTERS
2014; 39 (16): 4747-4750
Abstract
We report the fabrication and first demonstration of an electron beam position monitor for a dielectric microaccelerator. This device is fabricated on a fused silica substrate using standard optical lithography techniques and uses the radiated optical wavelength to measure the electron beam position with a resolution of 10 μm, or 7% of the electron beam spot size. This device also measures the electron beam spot size in one dimension.
View details for DOI 10.1364/OL.39.004747
View details for Web of Science ID 000341099400029
View details for PubMedID 25121864
-
Coherent Ising machine based on degenerate optical parametric oscillators
PHYSICAL REVIEW A
2013; 88 (6)
View details for DOI 10.1103/PhysRevA.88.063853
View details for Web of Science ID 000332108400018
-
Demonstration of electron acceleration in a laser-driven dielectric microstructure
NATURE
2013; 503 (7474): 91-?
View details for DOI 10.1038/nature12664
View details for Web of Science ID 000326585600037
View details for PubMedID 24077116
-
All-optical quantum random bit generation from intrinsically binary phase of parametric oscillators
OPTICS EXPRESS
2012; 20 (17): 19322-19330
Abstract
We demonstrate a novel all-optical quantum random number generator (RNG) based on above-threshold binary phase state selection in a degenerate optical parametric oscillator (OPO). Photodetection is not a part of the random process, and no post processing is required for the generated bit sequence. We show that the outcome is statistically random with 99% confidence, and verify that the randomness is due to the phase of initiating photons generated through spontaneous parametric down conversion of the pump, with negligible contribution of classical noise sources. With the use of micro- and nanoscale OPO resonators, this technique offers a promise for simple, robust, and high-speed on-chip all-optical quantum RNGs.
View details for Web of Science ID 000307873600084
View details for PubMedID 23038574
-
> 10 watt fiber laser structure with 0.5-5 MHz repetition rate and 0.5-1.5 pulse width
FIFTH INTERNATIONAL SYMPOSIUM ON LASER PRECISION MICROFABRICATION
2004; 5662: 496-500
View details for DOI 10.1117/12.596377
View details for Web of Science ID 000224751600081
-
QUASI-PHASE-MATCHED OPTICAL PARAMETRIC OSCILLATORS IN BULK PERIODICALLY POLED LINBO3
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1995; 12 (11): 2102-2116
View details for Web of Science ID A1995TD95600012
-
QUASI-PHASE-MATCHED 2ND HARMONIC-GENERATION - TUNING AND TOLERANCES
IEEE JOURNAL OF QUANTUM ELECTRONICS
1992; 28 (11): 2631-2654
View details for Web of Science ID A1992JU29000014
-
HIGH-RESOLUTION SPECTROSCOPY OF WHISPERING GALLERY MODES IN LARGE DIELECTRIC SPHERES
OPTICS LETTERS
1991; 16 (15): 1138-1140
Abstract
The mode spectrum of a 3.8-cm-diameter fused-silica sphere has been studied in the vicinity of 1.06 microm. A single-frequency Nd:YAG laser was used to excite whispering gallery modes by means of evanescent wave coupling. The spectrum is in excellent agreement with predictions from Mie theory.
View details for Web of Science ID A1991GA14300004
View details for PubMedID 19776899
-
COHERENCE PROPERTIES OF A DOUBLY RESONANT MONOLITHIC OPTICAL PARAMETRIC OSCILLATOR
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1990; 7 (5): 815-820
View details for Web of Science ID A1990DE18000018
-
CONTINUOUS-WAVE OPERATION AT 2.1-MU-M OF A DIODE-LASER-PUMPED, TM-SENSITIZED HO-Y3AL5O12 LASER AT 300-K
OPTICS LETTERS
1987; 12 (9): 678-680
Abstract
Room-temperature operation of a continuous-wave Tm-sensitized Ho:YAG laser at 2.0974 microm has been achieved under diode-laser pumping at 781.5 nm. Observed thresholds are as low as 4.4 mW, with a slope efficiency of 19% with 0.5% output coupling.
View details for Web of Science ID A1987J862000013
View details for PubMedID 19741837
-
DIODE-PUMPED CONTINUOUS-WAVE ND-GLASS LASER
OPTICS LETTERS
1986; 11 (12): 788-790
Abstract
We report on diode-laser pumping of monolithic Nd:glass laser oscillators. End pumping with a single-stripe diode laser, a threshold of 2.2 mW, and a slope efficiency of 42% were observed on a 2-mm-long oscillator with a mode radius of 35 microm. The oscillator generated 2.5 mW of single-ended output power in many (>20) axial modes.
View details for Web of Science ID A1986F211600011
View details for PubMedID 19738760
-
EFFICIENT, FREQUENCY-STABLE LASER-DIODE-PUMPED ND-YAG LASER
OPTICS LETTERS
1985; 10 (2): 62-64
Abstract
We have designed and tested a laser-diode-pumped monolithic Nd:YAG oscillator. The electrical-to-optical slope efficiency was 6.5%. The frequency jitter was less than 10 kHz over a 0.3-sec period, the best frequency stability reported for a Nd:YAG laser to date.
View details for Web of Science ID A1985AAU3100004
View details for PubMedID 19724346
-
SINGLE AXIAL MODE-OPERATION OF A Q-SWITCHED ND-YAG OSCILLATOR BY INJECTION SEEDING
IEEE JOURNAL OF QUANTUM ELECTRONICS
1984; 20 (2): 117-125
View details for Web of Science ID A1984SH61000007
-
COHERENT ANTI-STOKES RAMAN-SCATTERING FROM SMALL VOLUMES
OPTICS LETTERS
1984; 9 (6): 220-222
Abstract
We have used coherent anti-Stokes Raman scattering spectroscopy to resolve the Raman Q-branch line [Q (2) at 2987.18 cm(-1)] of dueterium gas contained in a 60-microm-diameter glass sphere. The 60-microm spheres contained only 10(+13) molecules at standard temperature and pressure; this made it possible to study gases that in larger quantities would be too dangerous or expensive to use.
View details for Web of Science ID A1984ST39600010
View details for PubMedID 19721550
-
COHERENT ANTI-STOKES RAMAN-SPECTROSCOPY
APPLIED PHYSICS LETTERS
1974; 25 (7): 387-390
View details for Web of Science ID A1974U144200011
-
Electron Pulse Compression with Optical Beat Note
PHYSICAL REVIEW LETTERS
2021; 127 (16)
View details for DOI 10.1103/PhysRevLett.127.164802
View details for Web of Science ID 000707499800003
-
Low-Energy-Spread Attosecond Bunching and Coherent Electron Acceleration in Dielectric Nanostructures
PHYSICAL REVIEW APPLIED
2021; 15 (2)
View details for DOI 10.1103/PhysRevApplied.15.L021002
View details for Web of Science ID 000628654500001
-
Novel Materials-based Laser Acceleration
IEEE. 2021
View details for Web of Science ID 000831479803055
-
Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo
SOFTWAREX
2021; 13
View details for DOI 10.1016/j.softx.2021.100658
View details for Web of Science ID 000656825700023
-
Low loss Gallium Oxide core/Silica cladding planar waveguide
IEEE. 2021
View details for Web of Science ID 000831479803142
-
Operating modes of dual-grating dielectric laser accelerators
PHYSICAL REVIEW ACCELERATORS AND BEAMS
2020; 23 (11)
View details for DOI 10.1103/PhysRevAccelBeams.23.114001
View details for Web of Science ID 000598051300001
-
Design of a multichannel photonic crystal dielectric laser accelerator
PHOTONICS RESEARCH
2020; 8 (10): 1586–98
View details for DOI 10.1364/PRJ.394127
View details for Web of Science ID 000577372300009
-
Low-loss GaOx-core/SiO2-cladding planar waveguides on Si substrate
OPTICS EXPRESS
2020; 28 (8): 12475–86
View details for DOI 10.1364/OE.391036
View details for Web of Science ID 000526518300149
-
Gallium Oxide for High-Power Optical Applications
ADVANCED OPTICAL MATERIALS
2020
View details for DOI 10.1002/adom.201901522
View details for Web of Science ID 000507932100001
-
Surface treatments of dielectric laser accelerators for increased laser-induced damage threshold
OPTICS LETTERS
2020; 45 (2): 391–94
View details for DOI 10.1364/OL.379628
View details for Web of Science ID 000510865100034
-
Design of a multi-channel photonic crystal dielectric laser accelerator
IEEE. 2020
View details for Web of Science ID 000612090003182
-
Silicon nitride waveguide as a power delivery component for dielectric laser accelerators
IEEE. 2020
View details for Web of Science ID 000612090002213
-
Experimental investigation of performance differences between coherent Ising machines and a quantum annealer.
Science advances
2019; 5 (5): eaau0823
Abstract
Physical annealing systems provide heuristic approaches to solving combinatorial optimization problems. Here, we benchmark two types of annealing machines-a quantum annealer built by D-Wave Systems and measurement-feedback coherent Ising machines (CIMs) based on optical parametric oscillators-on two problem classes, the Sherrington-Kirkpatrick (SK) model and MAX-CUT. The D-Wave quantum annealer outperforms the CIMs on MAX-CUT on cubic graphs. On denser problems, however, we observe an exponential penalty for the quantum annealer [exp(-alphaDW N 2)] relative to CIMs [exp(-alphaCIM N)] for fixed anneal times, both on the SK model and on 50% edge density MAX-CUT. This leads to a several orders of magnitude time-to-solution difference for instances with over 50 vertices. An optimal-annealing time analysis is also consistent with a substantial projected performance difference. The difference in performance between the sparsely connected D-Wave machine and the fully-connected CIMs provides strong experimental support for efforts to increase the connectivity of quantum annealers.
View details for DOI 10.1126/sciadv.aau0823
View details for PubMedID 31139743
-
Laser-Driven Electron Lensing in Silicon Microstructures.
Physical review letters
2019; 122 (10): 104801
Abstract
We demonstrate a laser-driven, tunable electron lens fabricated in monolithic silicon. The lens consists of an array of silicon pillars pumped symmetrically by two 300 fs, 1.95 μm wavelength, nJ-class laser pulses from an optical parametric amplifier. The optical near field of the pillar structure focuses electrons in the plane perpendicular to the pillar axes. With 100±10 MV/m incident laser fields, the lens focal length is measured to be 50±4 μm, which corresponds to an equivalent quadrupole focusing gradient B^{'} of 1.4±0.1 MT/m. By varying the incident laser field strength, the lens can be tuned from a 21±2 μm focal length (B^{'}>3.3 MT/m) to focal lengths on the centimeter scale.
View details for DOI 10.1103/PhysRevLett.122.104801
View details for PubMedID 30932681
-
Design of a plasmonic metasurface laser accelerator with a tapered phase velocity for subrelativistic particles
PHYSICAL REVIEW ACCELERATORS AND BEAMS
2019; 22 (2)
View details for DOI 10.1103/PhysRevAccelBeams.22.021303
View details for Web of Science ID 000458381900002
-
Silicon nitride waveguide as a power delivery component for on-chip dielectric laser accelerators
OPTICS LETTERS
2019; 44 (2): 335–38
Abstract
We study the weakly guided silicon nitride waveguide as an on-chip power delivery solution for dielectric laser accelerators (DLAs). We focus on the two main limiting factors on the waveguide network for DLAs: the optical damage and nonlinear characteristics. The typical delivered fluence at the onset of optical damage is measured to be ∼0.19 J/cm2 at a 2 μm central wavelength and 250 fs pulse width. This damage fluence is lower than that of the bulk Si3N4 (∼0.65 J/cm2), but higher than that of bulk silicon (∼0.17 J/cm2). We also report the nonlinearity-induced spectrum and phase variance of the output pulse at this pulse duration. We find that a total waveguide length within 3 mm is sufficient to avoid significant self-phase modulation effects when operating slightly below the damage threshold. We also estimate that one SiNx waveguide can power 70 μm silicon dual pillar DLAs from a single side, based on the results from the recent free-space DLA experiment.
View details for DOI 10.1364/OL.44.000335
View details for Web of Science ID 000455620100039
View details for PubMedID 30644894
-
Design of a tapered slot waveguide dielectric laser accelerator for sub-relativistic electrons
IEEE. 2019
View details for Web of Science ID 000482226300274
-
Design of a tapered slot waveguide dielectric laser accelerator for sub-relativistic electrons
OPTICS EXPRESS
2018; 26 (18): 22801–15
Abstract
We propose a dielectric laser accelerator design based on a tapered slot waveguide structure for sub-relativistic electron acceleration. This tapering scheme allows for straightforward tuning of the phase velocity of the accelerating field along the propagation direction, which is necessary for maintaining synchronization with electrons as their velocities increase. Furthermore, the non-resonant nature of this design allows for better tolerance to experimental errors. We also introduce a method to design this continuously tapered structure based on the eikonal approximation, and give a working example based on realistic experimental parameters.
View details for DOI 10.1364/OE.26.022801
View details for Web of Science ID 000443431400037
View details for PubMedID 30184935
-
On-Chip Laser-Power Delivery System for Dielectric Laser Accelerators
PHYSICAL REVIEW APPLIED
2018; 9 (5)
View details for DOI 10.1103/PhysRevApplied.9.054017
View details for Web of Science ID 000433002200001
-
Efficient half-harmonic generation of three-optical-cycle mid-IR frequency comb around 4 mu m using OP-GaP
OPTICS EXPRESS
2018; 26 (8): 9963–71
Abstract
We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, via half-harmonic generation using orientation-patterned GaP (OP-GaP) with ~43% conversion efficiency. We experimentally compare performance of GaP with GaAs and lithium niobate as the nonlinear element, and show how properties of GaP at this wavelength lead to generation of the shortest pulses and the highest conversion efficiency. These results shed new light on half-harmonic generation of frequency combs, and pave the way for generation of short-pulse intrinsically-locked frequency combs at longer wavelengths in the mid-infrared with high conversion efficiencies.
View details for DOI 10.1364/OE.26.009963
View details for Web of Science ID 000430337700050
View details for PubMedID 29715941
-
Temporal Simultons in Optical Parametric Oscillators
PHYSICAL REVIEW LETTERS
2018; 120 (5): 053904
Abstract
We report the first demonstration of a regime of operation in optical parametric oscillators (OPOs), in which the formation of temporal simultons produces stable femtosecond half-harmonic pulses. Simultons are simultaneous bright-dark solitons of a signal field at frequency ω and the pump field at 2ω, which form in a quadratic nonlinear medium. The formation of simultons in an OPO is due to the interplay of nonlinear pulse acceleration with the timing mismatch between the pump repetition period and the cold-cavity round-trip time and is evidenced by sech^{2} spectra with broad instantaneous bandwidths when the resonator is detuned to a slightly longer round-trip time than the pump repetition period. We provide a theoretical description of an OPO operating in a regime dominated by these dynamics, observe the distinct features of simulton formation in an experiment, and verify our results with numerical simulations. These results represent a new regime of operation in nonlinear resonators, which can lead to efficient and scalable sources of few-cycle frequency combs at arbitrary wavelengths.
View details for PubMedID 29481183
-
Effects of waveform model systematics on the interpretation of GW150914
CLASSICAL AND QUANTUM GRAVITY
2017; 34 (10)
View details for DOI 10.1088/1361-6382/aa6854
View details for Web of Science ID 000399335900001
-
Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544
PHYSICAL REVIEW D
2017; 95 (8)
View details for DOI 10.1103/PhysRevD.95.082005
View details for Web of Science ID 000399806900001
-
First Search for Gravitational Waves from Known Pulsars with Advanced LIGO
ASTROPHYSICAL JOURNAL
2017; 839 (1)
View details for DOI 10.3847/1538-4357/aa677f
View details for Web of Science ID 000399122600008
-
Calibration of the Advanced LIGO detectors for the discovery of the binary black-hole merger GW150914
PHYSICAL REVIEW D
2017; 95 (6)
View details for DOI 10.1103/PhysRevD.95.062003
View details for Web of Science ID 000399146300001
-
Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
PHYSICAL REVIEW LETTERS
2017; 118 (12)
Abstract
A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be Ω_{0}<1.7×10^{-7} with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20-86 Hz). This is a factor of ∼33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.
View details for DOI 10.1103/PhysRevLett.118.121101
View details for PubMedID 28388180
-
Directional Limits on Persistent Gravitational Waves from Advanced LIGO's First Observing Run
PHYSICAL REVIEW LETTERS
2017; 118 (12)
Abstract
We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20-1726 Hz frequency band. Finding no evidence of gravitational waves from either point sources or a stochastic background, we set limits at 90% confidence. For broadband point sources, we report upper limits on the gravitational wave energy flux per unit frequency in the range F_{α,Θ}(f)<(0.1-56)×10^{-8} erg cm^{-2} s^{-1} Hz^{-1}(f/25 Hz)^{α-1} depending on the sky location Θ and the spectral power index α. For extended sources, we report upper limits on the fractional gravitational wave energy density required to close the Universe of Ω(f,Θ)<(0.39-7.6)×10^{-8} sr^{-1}(f/25 Hz)^{α} depending on Θ and α. Directed searches for narrowband gravitational waves from astrophysically interesting objects (Scorpius X-1, Supernova 1987 A, and the Galactic Center) yield median frequency-dependent limits on strain amplitude of h_{0}<(6.7,5.5, and 7.0)×10^{-25}, respectively, at the most sensitive detector frequencies between 130-175 Hz. This represents a mean improvement of a factor of 2 across the band compared to previous searches of this kind for these sky locations, considering the different quantities of strain constrained in each case.
View details for DOI 10.1103/PhysRevLett.118.121102
View details for PubMedID 28388200
-
Simple, picojoule-sensitiveultraviolet autocorrelator based on two-photon conductivity in sapphire
APPLIED OPTICS
2017; 56 (8): 2226-2229
Abstract
We present a simple autocorrelator for ultraviolet pulses based on two-photon conductivity in a bench-top fabricatable sapphire sensor. We perform measurements on femtosecond 226-278 nm ultraviolet pulses from the third and fourth harmonics of a standard 76 MHz titanium sapphire oscillator and picosecond 266 nm pulses from the fourth harmonic of a 1064 nm 50 MHz neodymium vanadate oscillator. Our device is sensitive to 2.6 pJ ultraviolet pulses with peak powers below 20 W. These results represent the lowest measured autocorrelation peak powers by over one order of magnitude for a system with no reference pulse in the deep ultraviolet (<300 nm). The autocorrelator can potentially support UV pulse lengths from 50 fs-10s of picoseconds.
View details for DOI 10.1364/AO.56.002226
View details for Web of Science ID 000396227500027
View details for PubMedID 28375306
-
Exploring the sensitivity of next generation gravitational wave detectors
CLASSICAL AND QUANTUM GRAVITY
2017; 34 (4)
View details for DOI 10.1088/1361-6382/aa51f4
View details for Web of Science ID 000395397900001
-
All-sky search for short gravitational-wave bursts in the first Advanced LIGO run
PHYSICAL REVIEW D
2017; 95 (4)
View details for DOI 10.1103/PhysRevD.95.042003
View details for Web of Science ID 000394092200001
-
Optical gating and streaking of free electrons with sub-optical cycle precision
NATURE COMMUNICATIONS
2017; 8
Abstract
The temporal resolution of ultrafast electron diffraction and microscopy experiments is currently limited by the available experimental techniques for the generation and characterization of electron bunches with single femtosecond or attosecond durations. Here, we present proof of principle experiments of an optical gating concept for free electrons via direct time-domain visualization of the sub-optical cycle energy and transverse momentum structure imprinted on the electron beam. We demonstrate a temporal resolution of 1.2±0.3 fs. The scheme is based on the synchronous interaction between electrons and the near-field mode of a dielectric nano-grating excited by a femtosecond laser pulse with an optical period duration of 6.5 fs. The sub-optical cycle resolution demonstrated here is promising for use in laser-driven streak cameras for attosecond temporal characterization of bunched particle beams as well as time-resolved experiments with free-electron beams.
View details for DOI 10.1038/ncomms14342
View details for Web of Science ID 000392651000001
View details for PubMedID 28120930
View details for PubMedCentralID PMC5288495
-
The basic physics of the binary black hole merger GW150914
ANNALEN DER PHYSIK
2017; 529 (1-2)
View details for DOI 10.1002/andp.201600209
View details for Web of Science ID 000394437700003
-
A Simple, Picojoule Sensitive Ultraviolet Autocorrelator Based on Two-Photon Conductivity in Sapphire
IEEE. 2017
View details for Web of Science ID 000427296202506
-
Sub-optical-cycle control of free electrons by optical near-fields
IEEE. 2017
View details for Web of Science ID 000432564601363
-
THE RATE OF BINARY BLACK HOLE MERGERS INFERRED FROM ADVANCED LIGO OBSERVATIONS SURROUNDING GW150914
ASTROPHYSICAL JOURNAL LETTERS
2016; 833 (1)
View details for DOI 10.3847/2041-8205/833/1/L1
View details for Web of Science ID 000401603900001
-
SUPPLEMENT: "THE RATE OF BINARY BLACK HOLE MERGERS INFERRED FROM ADVANCED LIGO OBSERVATIONS SURROUNDING GW150914" (2016, ApJL, 833, L1)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 227 (2)
View details for DOI 10.3847/0067-0049/227/2/14
View details for Web of Science ID 000390341200001
-
UPPER LIMITS ON THE RATES OF BINARY NEUTRON STAR AND NEUTRON STAR-BLACK HOLE MERGERS FROM ADVANCED LIGO'S FIRST OBSERVING RUN
ASTROPHYSICAL JOURNAL LETTERS
2016; 832 (2)
View details for DOI 10.3847/2041-8205/832/2/L21
View details for Web of Science ID 000389176100001
-
Results of the deepest all-sky survey for continuous gravitational waves on LIGO S6 data running on the Einstein@Home volunteer distributed computing project
PHYSICAL REVIEW D
2016; 94 (10)
View details for DOI 10.1103/PhysRevD.94.102002
View details for Web of Science ID 000400765600003
-
First targeted search for gravitational-wave bursts from core-collapse supernovae in data of first-generation laser interferometer detectors
PHYSICAL REVIEW D
2016; 94 (10)
View details for DOI 10.1103/PhysRevD.94.102001
View details for Web of Science ID 000388584600001
-
Binary Black Hole Mergers in the First Advanced LIGO Observing Run
PHYSICAL REVIEW X
2016; 6 (4)
View details for DOI 10.1103/PhysRevX.6.041015
View details for Web of Science ID 000386388300002
-
Improved Analysis of GW150914 Using a Fully Spin-Precessing Waveform Model
PHYSICAL REVIEW X
2016; 6 (4)
View details for DOI 10.1103/PhysRevX.6.041014
View details for Web of Science ID 000386388300001
-
Directly comparing GW150914 with numerical solutions of Einstein's equations for binary black hole coalescence
PHYSICAL REVIEW D
2016; 94 (6)
View details for DOI 10.1103/PhysRevD.94.064035
View details for Web of Science ID 000383154300002
-
Comprehensive all-sky search for periodic gravitational waves in the sixth science run LIGO data
PHYSICAL REVIEW D
2016; 94 (4)
View details for DOI 10.1103/PhysRevD.94.042002
View details for Web of Science ID 000381491300001
-
Transverse and longitudinal characterization of electron beams using interaction with optical near-fields.
Optics letters
2016; 41 (15): 3435-3438
Abstract
We demonstrate an experimental technique for both transverse and longitudinal characterization of bunched femtosecond free electron beams. The operation principle is based on monitoring of the current of electrons that obtained an energy gain during the interaction with the synchronized optical near-field wave excited by femtosecond laser pulses. The synchronous accelerating/decelerating fields confined to the surface of a silicon nanostructure are characterized using a highly focused sub-relativistic electron beam. Here the transverse spatial resolution of 450 nm and femtosecond temporal resolution of 480 fs (sub-optical-cycle temporal regime is briefly discussed) achievable by this technique are demonstrated.
View details for DOI 10.1364/OL.41.003435
View details for PubMedID 27472587
-
LOCALIZATION AND BROADBAND FOLLOW-UP OF THE GRAVITATIONAL-WAVE TRANSIENT GW 150914
ASTROPHYSICAL JOURNAL LETTERS
2016; 826 (1)
View details for DOI 10.3847/2041-8205/826/1/L13
View details for Web of Science ID 000380739300013
-
Characterization of transient noise in Advanced LIGO relevant to gravitational wave signal GW150914
CLASSICAL AND QUANTUM GRAVITY
2016; 33 (13)
View details for DOI 10.1088/0264-9381/33/13/134001
View details for Web of Science ID 000378334600003
-
SUPPLEMENT: "LOCALIZATION AND BROADBAND FOLLOW-UP OF THE GRAVITATIONAL-WAVE TRANSIENT GW150914" (2016, ApJL, 826, L13)
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2016; 225 (1)
View details for DOI 10.3847/0067-0049/225/1/8
View details for Web of Science ID 000382309000008
-
High-energy neutrino follow-up search of gravitational wave event GW150914 with ANTARES and IceCube
PHYSICAL REVIEW D
2016; 93 (12)
View details for DOI 10.1103/PhysRevD.93.122010
View details for Web of Science ID 000378308200001
-
Search for transient gravitational waves in coincidence with short-duration radio transients during 2007-2013
PHYSICAL REVIEW D
2016; 93 (12)
View details for DOI 10.1103/PhysRevD.93.122008
View details for Web of Science ID 000378204700001
-
Demonstration of acceleration of relativistic electrons at a dielectric microstructure using femtosecond laser pulses
OPTICS LETTERS
2016; 41 (12): 2696-2699
View details for DOI 10.1364/OL.41.002696
View details for Web of Science ID 000378065900007
-
Observing gravitational-wave transient GW150914 with minimal assumptions
PHYSICAL REVIEW D
2016; 93 (12)
View details for DOI 10.1103/PhysRevD.93.122004
View details for Web of Science ID 000377303700003
-
Tests of General Relativity with GW150914
PHYSICAL REVIEW LETTERS
2016; 116 (22)
Abstract
The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-body motion of a compact-object binary in the large-velocity, highly nonlinear regime, and to witness the final merger of the binary and the excitation of uniquely relativistic modes of the gravitational field. We carry out several investigations to determine whether GW150914 is consistent with a binary black-hole merger in general relativity. We find that the final remnant's mass and spin, as determined from the low-frequency (inspiral) and high-frequency (postinspiral) phases of the signal, are mutually consistent with the binary black-hole solution in general relativity. Furthermore, the data following the peak of GW150914 are consistent with the least-damped quasinormal mode inferred from the mass and spin of the remnant black hole. By using waveform models that allow for parametrized general-relativity violations during the inspiral and merger phases, we perform quantitative tests on the gravitational-wave phase in the dynamical regime and we determine the first empirical bounds on several high-order post-Newtonian coefficients. We constrain the graviton Compton wavelength, assuming that gravitons are dispersed in vacuum in the same way as particles with mass, obtaining a 90%-confidence lower bound of 10^{13} km. In conclusion, within our statistical uncertainties, we find no evidence for violations of general relativity in the genuinely strong-field regime of gravity.
View details for DOI 10.1103/PhysRevLett.116.221101
View details for PubMedID 27314708
-
Molecular frequency reference at 1.56 mu m using a (CO)-C-12-O-16 overtone transition with the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy method
OPTICS LETTERS
2016; 41 (10): 2189-2192
View details for DOI 10.1364/OL.41.002189
View details for Web of Science ID 000375747600015
-
Molecular frequency reference at 1.56??µm using a <sup>12</sup>C<sup>16</sup>O overtone transition with the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy method.
Optics letters
2016; 41 (10): 2189-2192
Abstract
We report on a molecular clock based on the interrogation of the 3ν rotational-vibrational combination band at 1563 nm of carbon monoxide C1612O. The laser stabilization scheme is based on the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS) technique in frequency modulation (FM) saturation spectroscopy. We use a high-finesse ultra-low expansion (ULE) glass optical cavity with CO as the molecular reference for long-term stabilization of the cavity resonance. We report an Allan deviation of 1.8×10-12 at 1 s that improves to ∼3.5×10-14 with 1000 s of averaging.
View details for DOI 10.1364/OL.41.002189
View details for PubMedID 27176959
-
GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
PHYSICAL REVIEW LETTERS
2016; 116 (13)
Abstract
Following a major upgrade, the two advanced detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) held their first observation run between September 2015 and January 2016. With a strain sensitivity of 10^{-23}/sqrt[Hz] at 100 Hz, the product of observable volume and measurement time exceeded that of all previous runs within the first 16 days of coincident observation. On September 14, 2015, the Advanced LIGO detectors observed a transient gravitational-wave signal determined to be the coalescence of two black holes [B. P. Abbott et al., Phys. Rev. Lett. 116, 061102 (2016)], launching the era of gravitational-wave astronomy. The event, GW150914, was observed with a combined signal-to-noise ratio of 24 in coincidence by the two detectors. Here, we present the main features of the detectors that enabled this observation. At full sensitivity, the Advanced LIGO detectors are designed to deliver another factor of 3 improvement in the signal-to-noise ratio for binary black hole systems similar in mass to GW150914.
View details for DOI 10.1103/PhysRevLett.116.131103
View details for PubMedID 27081966
-
GW150914: Implications for the Stochastic Gravitational-Wave Background from Binary Black Holes
PHYSICAL REVIEW LETTERS
2016; 116 (13)
Abstract
The LIGO detection of the gravitational wave transient GW150914, from the inspiral and merger of two black holes with masses ≳30M_{⊙}, suggests a population of binary black holes with relatively high mass. This observation implies that the stochastic gravitational-wave background from binary black holes, created from the incoherent superposition of all the merging binaries in the Universe, could be higher than previously expected. Using the properties of GW150914, we estimate the energy density of such a background from binary black holes. In the most sensitive part of the Advanced LIGO and Advanced Virgo band for stochastic backgrounds (near 25 Hz), we predict Ω_{GW}(f=25 Hz)=1.1_{-0.9}^{+2.7}×10^{-9} with 90% confidence. This prediction is robustly demonstrated for a variety of formation scenarios with different parameters. The differences between models are small compared to the statistical uncertainty arising from the currently poorly constrained local coalescence rate. We conclude that this background is potentially measurable by the Advanced LIGO and Advanced Virgo detectors operating at their projected final sensitivity.
View details for DOI 10.1103/PhysRevLett.116.131102
View details for PubMedID 27081965
-
Cascaded half-harmonic generation of femtosecond frequency combs in the mid-infrared
OPTICA
2016; 3 (3): 324-327
View details for DOI 10.1364/OPTICA.3.000324
View details for Web of Science ID 000372339500017
-
First low frequency all-sky search for continuous gravitational wave signals
PHYSICAL REVIEW D
2016; 93 (4)
View details for DOI 10.1103/PhysRevD.93.042007
View details for Web of Science ID 000370807300001
-
ASTROPHYSICAL IMPLICATIONS OF THE BINARY BLACK HOLE MERGER GW150914
ASTROPHYSICAL JOURNAL LETTERS
2016; 818 (2)
View details for DOI 10.3847/2041-8205/818/2/L22
View details for Web of Science ID 000370444800001
-
Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers
PHYSICAL REVIEW D
2016; 93 (4)
View details for DOI 10.1103/PhysRevD.93.042006
View details for Web of Science ID 000370247800001
-
All-sky search for long-duration gravitational wave transients with initial LIGO
PHYSICAL REVIEW D
2016; 93 (4)
View details for DOI 10.1103/PhysRevD.93.042005
View details for Web of Science ID 000370028500001
-
Prospects for Observing and Localizing Gravitational-Wave Transients with Advanced LIGO and Advanced Virgo
LIVING REVIEWS IN RELATIVITY
2016; 19: 1-?
Abstract
We present a possible observing scenario for the Advanced LIGO and Advanced Virgo gravitational-wave detectors over the next decade, with the intention of providing information to the astronomy community to facilitate planning for multi-messenger astronomy with gravitational waves. We determine the expected sensitivity of the network to transient gravitational-wave signals, and study the capability of the network to determine the sky location of the source. We report our findings for gravitational-wave transients, with particular focus on gravitational-wave signals from the inspiral of binary neutron-star systems, which are considered the most promising for multi-messenger astronomy. The ability to localize the sources of the detected signals depends on the geographical distribution of the detectors and their relative sensitivity, and 90% credible regions can be as large as thousands of square degrees when only two sensitive detectors are operational. Determining the sky position of a significant fraction of detected signals to areas of 5 deg2 to 20 deg2 will require at least three detectors of sensitivity within a factor of ∼ 2 of each other and with a broad frequency bandwidth. Should the third LIGO detector be relocated to India as expected, a significant fraction of gravitational-wave signals will be localized to a few square degrees by gravitational-wave observations alone.
View details for DOI 10.1007/lrr-2016-1
View details for Web of Science ID 000370123100001
View details for PubMedCentralID PMC5256041
-
Fiber-feedback optical parametric oscillator for half-harmonic generation of sub-100-fs frequency combs around 2??µm.
Optics letters
2015; 40 (18): 4368-4371
Abstract
We demonstrate a femtosecond fiber-feedback optical parametric oscillator (OPO) at degeneracy. The OPO cavity comprises an 80-cm-long fiber composed of a combination of normal and anomalous dispersion sections that provide a net intracavity group delay dispersion close to zero. By using a mode-locked, Yb-doped fiber laser as the pump, we achieved half-harmonic generation of 250-MHz, 1.2-nJ nearly transform-limited 97-fs pulses centered at 2090 nm with a total conversion efficiency of 36%.
View details for DOI 10.1364/OL.40.004368
View details for PubMedID 26371938
-
Femtosecond optical parametric oscillator frequency combs
JOURNAL OF OPTICS
2015; 17 (9)
View details for DOI 10.1088/2040-8978/17/9/094010
View details for Web of Science ID 000364141100011
-
Epitaxial growth of GaP/AlGaP mirrors on Si for low thermal noise optical coatings
OPTICAL MATERIALS EXPRESS
2015; 5 (8): 1890-1897
View details for DOI 10.1364/OME.5.001890
View details for Web of Science ID 000360319300024
-
Characterization of the LIGO detectors during their sixth science run
CLASSICAL AND QUANTUM GRAVITY
2015; 32 (11)
View details for DOI 10.1088/0264-9381/32/11/115012
View details for Web of Science ID 000355238400013
-
Order within disorder: The atomic structure of ion-beam sputtered amorphous tantala (a-Ta2O5)
APL MATERIALS
2015; 3 (3)
View details for DOI 10.1063/1.4913586
View details for Web of Science ID 000352450200004
-
Laser acceleration and deflection of 96.3 keV electrons with a silicon dielectric structure
OPTICA
2015; 2 (2): 158-161
View details for DOI 10.1364/OPTICA.2.000158
View details for Web of Science ID 000354866800014
-
Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors
PHYSICAL REVIEW D
2015; 91 (2)
View details for DOI 10.1103/PhysRevD.91.022003
View details for Web of Science ID 000349414300002
-
Network of time-multiplexed optical parametric oscillators as a coherent Ising machine
NATURE PHOTONICS
2014; 8 (12): 937-942
View details for DOI 10.1038/NPHOTON.2014.249
View details for Web of Science ID 000345818600013
-
Advances in 2-mu m Tm-doped mode-locked fiber lasers
OPTICAL FIBER TECHNOLOGY
2014; 20 (6): 642-649
View details for DOI 10.1016/j.yofte.2014.06.005
View details for Web of Science ID 000344933400009
-
Application of a Hough search for continuous gravitational waves on data from the fifth LIGO science run
CLASSICAL AND QUANTUM GRAVITY
2014; 31 (8)
View details for DOI 10.1088/0264-9381/31/8/085014
View details for Web of Science ID 000334418900015
-
GRAVITATIONAL WAVES FROM KNOWN PULSARS: RESULTS FROM THE INITIAL DETECTOR ERA
ASTROPHYSICAL JOURNAL
2014; 785 (2)
View details for DOI 10.1088/0004-637X/785/2/119
View details for Web of Science ID 000335736800038
-
Constraints on Cosmic Strings from the LIGO-Virgo Gravitational-Wave Detectors
PHYSICAL REVIEW LETTERS
2014; 112 (13)
Abstract
Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitational wave detectors between 2005 and 2010, with over 625 days of live time. We find no evidence of GW signals from cosmic strings. From this result, we derive new constraints on cosmic string parameters, which complement and improve existing limits from previous searches for a stochastic background of GWs from cosmic microwave background measurements and pulsar timing data. In particular, if the size of loops is given by the gravitational backreaction scale, we place upper limits on the string tension Gμ below 10(-8) in some regions of the cosmic string parameter space.
View details for DOI 10.1103/PhysRevLett.112.131101
View details for Web of Science ID 000334339800002
View details for PubMedID 24745400
-
Constraints on cosmic strings from the LIGO-Virgo gravitational-wave detectors.
Physical review letters
2014; 112 (13): 131101-?
Abstract
Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitational wave detectors between 2005 and 2010, with over 625 days of live time. We find no evidence of GW signals from cosmic strings. From this result, we derive new constraints on cosmic string parameters, which complement and improve existing limits from previous searches for a stochastic background of GWs from cosmic microwave background measurements and pulsar timing data. In particular, if the size of loops is given by the gravitational backreaction scale, we place upper limits on the string tension Gμ below 10(-8) in some regions of the cosmic string parameter space.
View details for PubMedID 24745400
-
FIRST SEARCHES FOR OPTICAL COUNTERPARTS TO GRAVITATIONAL-WAVE CANDIDATE EVENTS
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2014; 211 (1)
View details for DOI 10.1088/0067-0049/211/1/7
View details for Web of Science ID 000332090200007
-
Fractional-length sync-pumped degenerate optical parametric oscillator for 500-MHz 3-mu m mid-infrared frequency comb generation
OPTICS LETTERS
2014; 39 (4): 900-903
Abstract
We demonstrate a mid-IR frequency comb centered at 3120 nm with 650-nm (20-THz) bandwidth at a comb-teeth spacing of 500 MHz. The generated comb is based on a compact ring-type synchronously pumped optical parametric oscillator (SPOPO) operating at degeneracy and pumped by a mode-locked Er-doped 1560 nm fiber laser at a repetition rate of 100 MHz. We achieve high-repetition rate by using a fractional-length cavity with a roundtrip length of 60 cm, which is one-fifth of the length dictated by conventional synchronous pumping.
View details for DOI 10.1364/OL.39.000900
View details for Web of Science ID 000331798000046
View details for PubMedID 24562236
-
Summary of the 2011 Dielectric Laser Accelerator Workshop
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
2014; 734: 51-59
View details for DOI 10.1016/j.nima.2013.06.055
View details for Web of Science ID 000327492100008
-
Invited Article: Advanced drag-free concepts for future space-based interferometers: acceleration noise performance
REVIEW OF SCIENTIFIC INSTRUMENTS
2014; 85 (1)
Abstract
Future drag-free missions for space-based experiments in gravitational physics require a Gravitational Reference Sensor with extremely demanding sensing and disturbance reduction requirements. A configuration with two cubical sensors is the current baseline for the Laser Interferometer Space Antenna (LISA) and has reached a high level of maturity. Nevertheless, several promising concepts have been proposed with potential applications beyond LISA and are currently investigated at HEPL, Stanford, and EADS Astrium, Germany. The general motivation is to exploit the possibility of achieving improved disturbance reduction, and ultimately understand how low acceleration noise can be pushed with a realistic design for future mission. In this paper, we discuss disturbance reduction requirements for LISA and beyond, describe four different payload concepts, compare expected strain sensitivities in the "low-frequency" region of the frequency spectrum, dominated by acceleration noise, and ultimately discuss advantages and disadvantages of each of those concepts in achieving disturbance reduction for space-based detectors beyond LISA.
View details for DOI 10.1063/1.4862199
View details for Web of Science ID 000331217300001
View details for PubMedID 24517738
-
Investigating the medium range order in amorphous Ta2O5 coatings
Conference of the Electron-Microscopy-and-Analysis-Group (EMAG)
IOP PUBLISHING LTD. 2014
View details for DOI 10.1088/1742-6596/522/1/012043
View details for Web of Science ID 000340969200043
-
Search for long-lived gravitational-wave transients coincident with long gamma-ray bursts
PHYSICAL REVIEW D
2013; 88 (12)
View details for DOI 10.1103/PhysRevD.88.122004
View details for Web of Science ID 000328692500004
-
Directed search for continuous gravitational waves from the Galactic center
PHYSICAL REVIEW D
2013; 88 (10)
View details for DOI 10.1103/PhysRevD.88.102002
View details for Web of Science ID 000327213300001
-
Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network
PHYSICAL REVIEW D
2013; 88 (6)
View details for DOI 10.1103/PhysRevD.88.062001
View details for Web of Science ID 000323946300001
-
Octave-spanning supercontinuum generation in in situ tapered As2S3 fiber pumped by a thulium-doped fiber laser
OPTICS LETTERS
2013; 38 (15): 2865-2868
View details for DOI 10.1364/OL.38.002865
View details for Web of Science ID 000322576200070
-
Octave-spanning supercontinuum generation in in situ tapered As2S3 fiber pumped by a thulium-doped fiber laser.
Optics letters
2013; 38 (15): 2865-2868
Abstract
We report a supercontinuum spanning well over an octave of measurable bandwidth from about 1 to 3.7 μm in a 2.1 mm long As₂S₃ fiber taper using the in situ tapering method. A sub-100-fs mode-locked thulium-doped fiber laser system with ~300 pJ of pulse energy was used as the pump source. Third-harmonic generation was observed and currently limits the pump pulse energy and achievable spectral bandwidth.
View details for DOI 10.1364/OL.38.002865
View details for PubMedID 23903165
-
Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light
NATURE PHOTONICS
2013; 7 (8): 613-619
View details for DOI 10.1038/NPHOTON.2013.177
View details for Web of Science ID 000322450200012
-
Amplified 2-mu m Thulium-Doped All-Fiber Mode-Locked Figure-Eight Laser
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (11): 1809-1812
View details for DOI 10.1109/JLT.2013.2258891
View details for Web of Science ID 000318702800003
-
A first search for coincident gravitational waves and high energy neutrinos using LIGO, Virgo and ANTARES data from 2007
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2013
View details for DOI 10.1088/1475-7516/2013/06/008
View details for Web of Science ID 000321200100008
-
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
2013
View details for DOI 10.3791/50518
View details for Web of Science ID 000209227700052
-
Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
PHYSICAL REVIEW D
2013; 87 (4)
View details for DOI 10.1103/PhysRevD.87.042001
View details for Web of Science ID 000314879200001
-
Search for gravitational waves from binary black hole inspiral, merger, and ringdown in LIGO-Virgo data from 2009-2010
PHYSICAL REVIEW D
2013; 87 (2)
View details for DOI 10.1103/PhysRevD.87.022002
View details for Web of Science ID 000313947400001
-
In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation.
Journal of visualized experiments : JoVE
2013
Abstract
Supercontinuum generation (SCG) in a tapered chalcogenide fiber is desirable for broadening mid-infrared (or mid-IR, roughly the 2-20 μm wavelength range) frequency combs(1, 2) for applications such as molecular fingerprinting, (3) trace gas detection, (4) laser-driven particle acceleration, (5) and x-ray production via high harmonic generation. (6) Achieving efficient SCG in a tapered optical fiber requires precise control of the group velocity dispersion (GVD) and the temporal properties of the optical pulses at the beginning of the fiber, (7) which depend strongly on the geometry of the taper. (8) Due to variations in the tapering setup and procedure for successive SCG experiments-such as fiber length, tapering environment temperature, or power coupled into the fiber, in-situ spectral monitoring of the SCG is necessary to optimize the output spectrum for a single experiment. In-situ fiber tapering for SCG consists of coupling the pump source through the fiber to be tapered to a spectral measurement device. The fiber is then tapered while the spectral measurement signal is observed in real-time. When the signal reaches its peak, the tapering is stopped. The in-situ tapering procedure allows for generation of a stable, octave-spanning, mid-IR frequency comb from the sub harmonic of a commercially available near-IR frequency comb. (9) This method lowers cost due to the reduction in time and materials required to fabricate an optimal taper with a waist length of only 2 mm. The in-situ tapering technique can be extended to optimizing microstructured optical fiber (MOF) for SCG(10) or tuning of the passband of MOFs, (11) optimizing tapered fiber pairs for fused fiber couplers(12) and wavelength division multiplexers (WDMs), (13) or modifying dispersion compensation for compression or stretching of optical pulses.(14-16.)
View details for DOI 10.3791/50518
View details for PubMedID 23748947
-
LAGRANGE: LAser GRavitational-wave ANtenna in GEodetic Orbit
9th LISA Symposium
ASTRONOMICAL SOC PACIFIC. 2013: 191–195
View details for Web of Science ID 000316716900020
-
Sub-50 fs pulses around 2070 nm from a synchronously-pumped, degenerate OPO
OPTICS EXPRESS
2012; 20 (25): 27589-27595
Abstract
We report generation of 48 fs pulses at a center wavelength of 2070 nm using a degenerate optical parametric oscillator (OPO) synchronously-pumped with a commercially available 36-MHz, femtosecond, mode-locked, Yb-doped fiber laser. The spectral bandwidth of the output is ~137 nm, corresponding to a theoretical, transform-limited pulse width of 33 fs. The threshold of the OPO is less than 10 mW of average pump power. By tuning the cavity length, the output spectrum covers a spectral width of more than 400 nm, limited only by the bandwidth of the cavity mirrors.
View details for Web of Science ID 000314746600038
View details for PubMedID 23262708
-
SWIFT FOLLOW-UP OBSERVATIONS OF CANDIDATE GRAVITATIONAL-WAVE TRANSIENT EVENTS
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2012; 203 (2)
View details for DOI 10.1088/0067-0049/203/2/28
View details for Web of Science ID 000312100500012
-
SEARCH FOR GRAVITATIONAL WAVES ASSOCIATED WITH GAMMA-RAY BURSTS DURING LIGO SCIENCE RUN 6 AND VIRGO SCIENCE RUNS 2 AND 3
ASTROPHYSICAL JOURNAL
2012; 760 (1)
View details for DOI 10.1088/0004-637X/760/1/12
View details for Web of Science ID 000310922200012
-
Mid-infrared supercontinuum generation in tapered chalcogenide fiber for producing octave-spanning frequency comb around 3 mu m
OPTICS EXPRESS
2012; 20 (22): 24218-24225
Abstract
We demonstrate mid-infrared (mid-IR) supercontinuum generation (SCG) with instantaneous bandwidth from 2.2 to 5 μm at 40 dB below the peak, covering the wavelength range desirable for molecular spectroscopy and numerous other applications. The SCG occurs in a tapered As(2)S(3) fiber prepared by in-situ tapering and is pumped by femtosecond pulses from the subharmonic of a mode-locked Er-doped fiber laser. Interference with a narrow linewidth c.w. laser verifies that the coherence properties of the near-IR frequency comb have been preserved through these cascaded nonlinear processes. With this approach stable broad mid-IR frequency combs can be derived from commercially available near-IR frequency combs without an extra stabilization mechanism.
View details for Web of Science ID 000310443400013
View details for PubMedID 23187184
-
IMPLICATIONS FOR THE ORIGIN OF GRB 051103 FROM LIGO OBSERVATIONS
ASTROPHYSICAL JOURNAL
2012; 755 (1)
View details for DOI 10.1088/0004-637X/755/1/2
View details for Web of Science ID 000306909500002
-
The characterization of Virgo data and its impact on gravitational-wave searches
CLASSICAL AND QUANTUM GRAVITY
2012; 29 (15)
View details for DOI 10.1088/0264-9381/29/15/155002
View details for Web of Science ID 000306421400003
-
All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run
PHYSICAL REVIEW D
2012; 85 (12)
View details for DOI 10.1103/PhysRevD.85.122007
View details for Web of Science ID 000305563600001
-
Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 600-1000 Hz
PHYSICAL REVIEW D
2012; 85 (12)
View details for DOI 10.1103/PhysRevD.85.122001
View details for Web of Science ID 000304750000001
-
Search for gravitational waves from intermediate mass binary black holes
PHYSICAL REVIEW D
2012; 85 (10)
View details for DOI 10.1103/PhysRevD.85.102004
View details for Web of Science ID 000304401400001
-
Effect of Si-induced defects on 1 mu m absorption losses in laser-grade YAG ceramics
JOURNAL OF APPLIED PHYSICS
2012; 111 (9)
View details for DOI 10.1063/1.4709756
View details for Web of Science ID 000304109900004
-
First low-latency LIGO plus Virgo search for binary inspirals and their electromagnetic counterparts
ASTRONOMY & ASTROPHYSICS
2012; 541
View details for DOI 10.1051/0004-6361/201218860
View details for Web of Science ID 000304390900155
-
Optics and Photonics: Key Enabling Technologies
PROCEEDINGS OF THE IEEE
2012; 100: 1604-1643
View details for DOI 10.1109/JPROC.2012.2190174
View details for Web of Science ID 000309838000045
-
Search for gravitational waves from low mass compact binary coalescence in LIGO's sixth science run and Virgo's science runs 2 and 3
PHYSICAL REVIEW D
2012; 85 (8)
View details for DOI 10.1103/PhysRevD.85.082002
View details for Web of Science ID 000302996100002
-
Octave-spanning ultrafast OPO with 2.6-6.1 mu m instantaneous bandwidth pumped by femtosecond Tm-fiber laser
OPTICS EXPRESS
2012; 20 (7): 7046-7053
Abstract
We report the extension of broadband degenerate OPO operation further into mid-infrared. A femtosecond thulium fiber laser with output centered at 2050 nm synchronously pumps a 500-μm-long crystal of orientation patterned GaAs providing broadband gain centered at 4.1 µm. We observe a pump threshold of 17 mW and output bandwidth extending from 2.6 to 6.1 µm at the -30 dB level. Average output power was 37 mW. Appropriate resonator group dispersion is a key factor for achieving degenerate operation with instantaneously broad bandwidth. The output spectrum is very sensitive to absorption and dispersion introduced by molecular species inside the OPO cavity.
View details for Web of Science ID 000302138800024
View details for PubMedID 22453385
-
Coherence properties of a broadband femtosecond mid-IR optical parametric oscillator operating at degeneracy
OPTICS EXPRESS
2012; 20 (7): 7255-7262
Abstract
We study coherence properties of a χ(²) optical parametric oscillator (OPO), which produces 2/3-octave-wide spectrum centered at the subharmonic (3120 nm) of the femtosecond pump laser. Our method consists of interfering the outputs of two identical, but independent OPOs pumped by the same laser. We demonstrate that the two OPOs show stable spatial and temporal interference and are mutually locked in frequency and in phase. By observing a collective heterodyne beat signal between the two OPOs we show that one can deterministically choose, by cavity length adjustment, between the two frequency states corresponding to the two sets of modes shifted with respect to each other by half of the laser pulse repetition rate. Moreover, we observe that the existence of two opposite phase states, a known common feature of a parametrically driven n = 2 subharmonic oscillator, reveals itself in our experiment as a common phase, 0 or π, being established through the whole set of some 300 thousand longitudinal modes.
View details for Web of Science ID 000302138800046
View details for PubMedID 22453407
-
Design of a subnanometer resolution beam position monitor for dielectric laser accelerators
OPTICS LETTERS
2012; 37 (5): 975-977
Abstract
We present a new concept for a beam position monitor with the unique ability to map particle beam position to a measurable wavelength. Coupled with an optical spectrograph, this beam position monitor is capable of subnanometer resolution. We describe one possible design, and through finite-element frequency-domain simulations, we show a resolution of 0.7 nm. Because of its high precision and ultracompact form factor, this device is ideal for future x-ray sources and laser-driven particle accelerators "on a chip."
View details for Web of Science ID 000301195100073
View details for PubMedID 22378457
-
Implementation and testing of the first prompt search for gravitational wave transients with electromagnetic counterparts
ASTRONOMY & ASTROPHYSICS
2012; 539
View details for DOI 10.1051/0004-6361/201118219
View details for Web of Science ID 000303262000131
-
Waveguides in three-dimensional photonic bandgap materials for particle-accelerator on a chip architectures
OPTICS EXPRESS
2012; 20 (5): 5607-5612
Abstract
The quest for less costly and more compact high-energy particle accelerators makes research on alternative acceleration mechanisms an important enterprise. From the multitude of suggested concepts, the photonic accelerator design by B. M. Cowan [Phys. Rev. ST Accel. Beams 11, 011301 (2008)] stands out by its distinct potential of creating an accelerator on a chip [Proposal E-163, SLAC (2001)]. Herein, electrons are accelerated by the axial electric field of a strongly confined optical mode of an air waveguide within a silicon-based three-dimensional photonic band-gap material. Using a combination of direct laser writing and silicon double inversion, we here present the first experimental realization of this complex structure. Optical spectroscopy provides unambiguous evidence for the existence of an accelerating waveguide mode with axial polarization.
View details for DOI 10.1364/OE.20.005607
View details for Web of Science ID 000301053200081
View details for PubMedID 22418367
-
All-sky search for periodic gravitational waves in LIGO S5 the full data
PHYSICAL REVIEW D
2012; 85 (2)
View details for DOI 10.1103/PhysRevD.85.022001
View details for Web of Science ID 000298989700001
-
Nearly 3-6 m Spectral Comb Derived from Tm Mode-locked Laser using GaAs-based Degenerate OPO
Conference on Lasers and Electro-Optics (CLEO)
IEEE. 2012
View details for Web of Science ID 000310362400182
-
Design, Fabrication, and Testing of a Fused-Silica Dual-Layer Grating Structure for Direct Laser Acceleration of Electrons
15th Workshop on Advanced Accelerator Concepts (AAC)
AMER INST PHYSICS. 2012: 169–177
View details for DOI 10.1063/1.4773690
View details for Web of Science ID 000315058700014
-
Grating-Based Deflecting, Focusing, and Diagnostic Dielectric Laser Accelerator Structures
15th Workshop on Advanced Accelerator Concepts (AAC)
AMER INST PHYSICS. 2012: 516–520
View details for DOI 10.1063/1.4773750
View details for Web of Science ID 000315058700074
-
Broadband mid-IR subharmonic OPOs for molecular spectroscopy
Conference on Nonlinear Frequency Generation and Conversion - Materials, Devices, and Applications XI
SPIE-INT SOC OPTICAL ENGINEERING. 2012
View details for DOI 10.1117/12.911845
View details for Web of Science ID 000302636900022
-
Beam Dynamics and Wakefield Simulations of The Double Grating Accelerating Structure
15th Workshop on Advanced Accelerator Concepts (AAC)
AMER INST PHYSICS. 2012: 476–481
View details for DOI 10.1063/1.4773743
View details for Web of Science ID 000315058700067
-
Laser Damage Threshold Measurements of Optical Materials for Direct Laser Accelerators
15th Workshop on Advanced Accelerator Concepts (AAC)
AMER INST PHYSICS. 2012: 511–515
View details for DOI 10.1063/1.4773749
View details for Web of Science ID 000315058700073
-
Mid-Infrared Supercontinuum Generation from 2.4 mu m to 4.6 mu m in Tapered Chalcogenide Fiber
Conference on Lasers and Electro-Optics (CLEO)
IEEE. 2012
View details for Web of Science ID 000310362401071
-
Directional Limits on Persistent Gravitational Waves Using LIGO S5 Science Data
PHYSICAL REVIEW LETTERS
2011; 107 (27)
Abstract
The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10(-50) strain(2) Hz(-1) and 5-35×10(-49) strain(2) Hz(-1) sr(-1) for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10(-25) in the most sensitive frequency range near 160 Hz.
View details for DOI 10.1103/PhysRevLett.107.271102
View details for Web of Science ID 000298611000007
View details for PubMedID 22243300
-
A gravitational wave observatory operating beyond the quantum shot-noise limit
NATURE PHYSICS
2011; 7 (12): 962-965
View details for DOI 10.1038/NPHYS2083
View details for Web of Science ID 000298186100020
-
BEATING THE SPIN-DOWN LIMIT ON GRAVITATIONAL WAVE EMISSION FROM THE VELA PULSAR
ASTROPHYSICAL JOURNAL
2011; 737 (2)
View details for DOI 10.1088/0004-637X/737/2/93
View details for Web of Science ID 000294013600047
-
SEARCH FOR GRAVITATIONAL WAVE BURSTS FROM SIX MAGNETARS
ASTROPHYSICAL JOURNAL LETTERS
2011; 734 (2)
View details for DOI 10.1088/2041-8205/734/2/L35
View details for Web of Science ID 000293135700010
-
Search for gravitational waves from binary black hole inspiral, merger, and ringdown
PHYSICAL REVIEW D
2011; 83 (12)
View details for DOI 10.1103/PhysRevD.83.122005
View details for Web of Science ID 000291312700002
-
Broadband degenerate OPO for mid-infrared frequency comb generation.
Optics express
2011; 19 (7): 6296-6302
Abstract
We present a new technique suitable for generating broadband phase- and frequency-locked frequency combs in the mid-infrared. Our source is based on a degenerate optical parametric oscillator (OPO) which rigorously both down-converts and augments the spectrum of a pump frequency comb provided by a commercial mode-locked near-IR laser. Low intracavity dispersion, combined with extensive cross-mixing of comb components, results in extremely broad instantaneous mid-IR bandwidths. We achieve an output power of 60 mW and 20 dB bandwidth extending from 2500 to 3800 nm. Among other applications, such a source is well-suited for coherent Fourier-transform spectroscopy in the absorption-rich mid-IR 'molecular fingerprint' region.
View details for DOI 10.1364/OE.19.006296
View details for PubMedID 21451655
-
Broadband degenerate OPO for mid-infrared frequency comb generation
OPTICS EXPRESS
2011; 19 (7): 6304-6310
View details for Web of Science ID 000288852700061
-
Balancing interferometers with slow-light elements
OPTICS LETTERS
2011; 36 (6): 933-935
Abstract
In this Letter we show that interferometers with unbalanced arm lengths can be balanced using optical elements with appropriate group delays. For matched group delays of the arms, the balanced interferometer becomes insensitive to the frequency noise of the source. For experimental illustration, a ring resonator is employed as a slow-light element to compensate the arm-length mismatch of a Mach-Zehnder interferometer. An arm-length mismatch of 9.4 m is compensated by a ring resonator with a finesse of 70 and a perimeter of 42 cm.
View details for Web of Science ID 000288322800053
View details for PubMedID 21403733
-
Search for gravitational waves associated with the August 2006 timing glitch of the Vela pulsar
PHYSICAL REVIEW D
2011; 83 (4)
View details for DOI 10.1103/PhysRevD.83.042001
View details for Web of Science ID 000286983900001
-
Octave Wide Mid-Infrared Frequency Comb Rigorously Derived from commercial Near-IR Mode-locked Laser
Conference on Lasers and Electro-Optics (CLEO)
IEEE. 2011
View details for Web of Science ID 000295612402223
-
Mid-IR spectral comb with broad instantaneous bandwidth using subharmonic OPO
Conference on Nonlinear Frequency Generation and Conversion - Materials, Devices, and Applications X
SPIE-INT SOC OPTICAL ENGINEERING. 2011
View details for DOI 10.1117/12.876203
View details for Web of Science ID 000297785600039
-
Electromagnetic forces in the vacuum region of laser-driven layered grating structures
JOURNAL OF MODERN OPTICS
2011; 58 (17): 1518-1528
View details for DOI 10.1080/09500340.2011.611914
View details for Web of Science ID 000295867000003
-
Coherence properties of a mid-infrared frequency comb produced by a degenerate optical parametric oscillator
Conference on Lasers and Electro-Optics (CLEO)
IEEE. 2011
View details for Web of Science ID 000295612404100
-
Calibration of the LIGO gravitational wave detectors in the fifth science run
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
2010; 624 (1): 223-240
View details for DOI 10.1016/j.nima.2010.07.089
View details for Web of Science ID 000284303600031
-
Search for gravitational waves from compact binary coalescence in LIGO and Virgo data from S5 and VSR1
PHYSICAL REVIEW D
2010; 82 (10)
View details for DOI 10.1103/PhysRevD.82.102001
View details for Web of Science ID 000283845000001
-
FIRST SEARCH FOR GRAVITATIONAL WAVES FROM THE YOUNGEST KNOWN NEUTRON STAR
ASTROPHYSICAL JOURNAL
2010; 722 (2): 1504-1513
View details for DOI 10.1088/0004-637X/722/2/1504
View details for Web of Science ID 000284075400040
-
Predictions for the rates of compact binary coalescences observable by ground-based gravitational-wave detectors
CLASSICAL AND QUANTUM GRAVITY
2010; 27 (17)
View details for DOI 10.1088/0264-9381/27/17/173001
View details for Web of Science ID 000280317700001
-
Laser-gain scanning microscopy: a new characterization technique for dopant engineered gain media
OPTICS EXPRESS
2010; 18 (18): 18912-18921
Abstract
We demonstrate an optical technique, called laser-gain scanning microscopy (LGSM), to map dopant concentration profiles in engineered laser gain-media. The performance and application range of this technique are exampled on a Nd(3+) concentration profile embedded in a YAG transparent ceramic sample. Concentration profiles measured by both LGSM and SIMS techniques are compared and agree to within 5% over three-orders of magnitude in Nd(3+) doping level, from 0.001 at.% to 0.9 at.%. One of the unique advantages of LGSM over common physical methods such as SIMS, XPS and EMPA, is the ability to correlate optical defects with the final doping profile.
View details for Web of Science ID 000282107900044
View details for PubMedID 20940785
-
SEARCH FOR GRAVITATIONAL-WAVE INSPIRAL SIGNALS ASSOCIATED WITH SHORT GAMMA-RAY BURSTS DURING LIGO'S FIFTH AND VIRGO'S FIRST SCIENCE RUN
ASTROPHYSICAL JOURNAL
2010; 715 (2): 1453-1461
View details for DOI 10.1088/0004-637X/715/2/1453
View details for Web of Science ID 000277642100058
-
SEARCH FOR GRAVITATIONAL-WAVE BURSTS ASSOCIATED WITH GAMMA-RAY BURSTS USING DATA FROM LIGO SCIENCE RUN 5 AND VIRGO SCIENCE RUN 1
ASTROPHYSICAL JOURNAL
2010; 715 (2): 1438-1452
View details for DOI 10.1088/0004-637X/715/2/1438
View details for Web of Science ID 000277642100057
-
All-sky search for gravitational-wave bursts in the first joint LIGO-GEO-Virgo run
PHYSICAL REVIEW D
2010; 81 (10)
View details for DOI 10.1103/PhysRevD.81.102001
View details for Web of Science ID 000278146700004
-
Self-phase-locked divide-by-2 optical parametric oscillator as a broadband frequency comb source
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
2010; 27 (5): 876-882
View details for Web of Science ID 000277241400003
-
Fiber-coupled, Littrow-grating cavity displacement sensor
OPTICS LETTERS
2010; 35 (8): 1260-1262
Abstract
We have demonstrated a compact, optical-fiber-fed, optical displacement sensor utilizing a Littrow-mounted diffraction grating to form a low-finesse Fabry-Perot cavity. Length changes of the cavity are read out via the Pound-Drever-Hall rf modulation technique at 925 MHz. The sensor has a nominal working distance of 2 cm and a total dynamic range of 160 nm. The displacement noise floor was less than 3x10(-10) m/sqrt[Hz] above 10(-2) Hz, limited by the frequency drift of the reference laser. A frequency-stabilized laser would reduce the noise floor to below 10(-12) m/sqrt[Hz]. The use of a 925 MHz modulation frequency demonstrates high-precision readout of a low-finesse compact resonant cavity.
View details for Web of Science ID 000276861100049
View details for PubMedID 20410986
-
SEARCHES FOR GRAVITATIONAL WAVES FROM KNOWN PULSARS WITH SCIENCE RUN 5 LIGO DATA
ASTROPHYSICAL JOURNAL
2010; 713 (1): 671-685
View details for DOI 10.1088/0004-637X/713/1/671
View details for Web of Science ID 000275918500060
-
More Than 1000-nm-wide Mid-IR Frequency Comb Based on Divide-by-2 Optical Parametric Oscillator
Conference on Lasers and Electro-Optics (CLEO)/Quantum Electronics and Laser Science Conference (QELS)
IEEE. 2010
View details for Web of Science ID 000290513601053
-
Fabrication and Characterization of Woodpile Structures for Direct Laser Acceleration
14th Workshop on Advanced Accelerator Concepts
AMER INST PHYSICS. 2010: 439–444
View details for Web of Science ID 000287176200072
-
Compact couplers for overmoded three-dimensional photonic crystal waveguides
Conference on Photonic and Phononic Crystal Materials and Devices X
SPIE-INT SOC OPTICAL ENGINEERING. 2010
View details for DOI 10.1117/12.841538
View details for Web of Science ID 000283790200025
-
Search for high frequency gravitational-wave bursts in the first calendar year of LIGO's fifth science run
PHYSICAL REVIEW D
2009; 80 (10)
View details for DOI 10.1103/PhysRevD.80.102002
View details for Web of Science ID 000272313300005
-
Search for gravitational-wave bursts in the first year of the fifth LIGO science run
PHYSICAL REVIEW D
2009; 80 (10)
View details for DOI 10.1103/PhysRevD.80.102001
View details for Web of Science ID 000272313300004
-
Photonic-based laser driven electron beam deflection and focusing structures
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2009; 12 (10)
View details for DOI 10.1103/PhysRevSTAB.12.101302
View details for Web of Science ID 000271932200006
-
First LIGO search for gravitational wave bursts from cosmic (super)strings
PHYSICAL REVIEW D
2009; 80 (6)
View details for DOI 10.1103/PhysRevD.80.062002
View details for Web of Science ID 000270385200007
-
Search for gravitational wave ringdowns from perturbed black holes in LIGO S4 data
PHYSICAL REVIEW D
2009; 80 (6)
View details for DOI 10.1103/PhysRevD.80.062001
View details for Web of Science ID 000270385200006
-
An upper limit on the stochastic gravitational-wave background of cosmological origin
NATURE
2009; 460 (7258): 990-994
Abstract
A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources of astrophysical and cosmological origin. It should carry unique signatures from the earliest epochs in the evolution of the Universe, inaccessible to standard astrophysical observations. Direct measurements of the amplitude of this background are therefore of fundamental importance for understanding the evolution of the Universe when it was younger than one minute. Here we report limits on the amplitude of the stochastic gravitational-wave background using the data from a two-year science run of the Laser Interferometer Gravitational-wave Observatory (LIGO). Our result constrains the energy density of the stochastic gravitational-wave background normalized by the critical energy density of the Universe, in the frequency band around 100 Hz, to be <6.9 x 10(-6) at 95% confidence. The data rule out models of early Universe evolution with relatively large equation-of-state parameter, as well as cosmic (super)string models with relatively small string tension that are favoured in some string theory models. This search for the stochastic background improves on the indirect limits from Big Bang nucleosynthesis and cosmic microwave background at 100 Hz.
View details for DOI 10.1038/nature08278
View details for Web of Science ID 000269085500029
View details for PubMedID 19693079
-
STACKED SEARCH FOR GRAVITATIONAL WAVES FROM THE 2006 SGR 1900+14 STORM
ASTROPHYSICAL JOURNAL LETTERS
2009; 701 (2): L68-L74
View details for DOI 10.1088/0004-637X/701/2/L68
View details for Web of Science ID 000268867900002
-
Einstein@Home search for periodic gravitational waves in early S5 LIGO data
PHYSICAL REVIEW D
2009; 80 (4)
View details for DOI 10.1103/PhysRevD.80.042003
View details for Web of Science ID 000269641400005
-
Search for gravitational waves from low mass compact binary coalescence in 186 days of LIGO's fifth science run
PHYSICAL REVIEW D
2009; 80 (4)
View details for DOI 10.1103/PhysRevD.80.047101
View details for Web of Science ID 000269641400116
-
Observation of a kilogram-scale oscillator near its quantum ground state
NEW JOURNAL OF PHYSICS
2009; 11
View details for DOI 10.1088/1367-2630/11/7/073032
View details for Web of Science ID 000268324400001
-
LIGO: the Laser Interferometer Gravitational-Wave Observatory
REPORTS ON PROGRESS IN PHYSICS
2009; 72 (7)
View details for DOI 10.1088/0034-4885/72/7/076901
View details for Web of Science ID 000267511200004
-
Precise diffraction efficiency measurements of large-area greater-than-99%-efficient dielectric gratings at the Littrow angle
OPTICS LETTERS
2009; 34 (11): 1708-1710
Abstract
We have developed improved cavity-finesse methods for characterizing the diffraction efficiencies of large gratings at the Littrow angle. These methods include measuring cavity length with optical techniques, using a Michelson interferometer to calibrate piezoelectric transducer nonlinearities and angle-tuning procedures to confirm optimal alignment. We used these methods to characterize two 20 cm scale dielectric gratings. The values taken from across their surfaces collectively had means and standard deviations of micro=99.293% and sigma=0.164% and micro=99.084% and sigma=0.079%. The greatest efficiency observed at a single point on a grating was (99.577+/-0.002)%, which is also the most accurate measurement of the diffraction efficiency in the literature of which we are aware. These results prove that a high diffraction efficiency with low variation is achievable across large apertures for gratings.
View details for Web of Science ID 000267401200032
View details for PubMedID 19488156
-
Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data
PHYSICAL REVIEW D
2009; 79 (12)
View details for DOI 10.1103/PhysRevD.79.122001
View details for Web of Science ID 000267701500005
-
All-Sky LIGO Search for Periodic Gravitational Waves in the Early Fifth-Science-Run Data
PHYSICAL REVIEW LETTERS
2009; 102 (11)
Abstract
We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1100 Hz and with the frequency's time derivative in the range -5 x 10{-9}-0 Hz s{-1}. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semicoherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 10{-24} are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 10{-6}, the search is sensitive to distances as great as 500 pc.
View details for DOI 10.1103/PhysRevLett.102.111102
View details for Web of Science ID 000264380200013
View details for PubMedID 19392186
-
High-Power Yb3+-Doped Phosphate Fiber Amplifier
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
2009; 15 (1): 93-102
View details for DOI 10.1109/JSTQE.2008.2010263
View details for Web of Science ID 000263315100013
-
Optical Accelerator Structures
13th Advanced Accelerator Concepts Workshop
AMER INST PHYSICS. 2009: 56–64
View details for Web of Science ID 000264166500007
-
Self-phase-locked divide-by-2 optical parametric oscillator as a broadband frequency comb source
Conference on Nonlinear Frequency Generation and Conversion - Materials, Devices, and Applications VIII
SPIE-INT SOC OPTICAL ENGINEERING. 2009
View details for DOI 10.1117/12.808652
View details for Web of Science ID 000285085500026
-
Accelerating electrons with lasers and photonic crystals
39th Winter Colloquium on the Physics of Quantum Electronics
TAYLOR & FRANCIS LTD. 2009: 2142–47
View details for DOI 10.1080/09500340903318539
View details for Web of Science ID 000272380800033
-
Woodpile Structure Fabrication for Photonic Crystal Laser Acceleration
13th Advanced Accelerator Concepts Workshop
AMER INST PHYSICS. 2009: 544–549
View details for Web of Science ID 000264166500082
-
Einstein@Home search for periodic gravitational waves in LIGO S4 data
PHYSICAL REVIEW D
2009; 79 (2)
View details for DOI 10.1103/PhysRevD.79.022001
View details for Web of Science ID 000262979800005
-
First joint search for gravitational-wave bursts in LIGO and GEO 600 data
CLASSICAL AND QUANTUM GRAVITY
2008; 25 (24)
View details for DOI 10.1088/0264-9381/25/24/245008
View details for Web of Science ID 000261383800008
-
Search for Gravitational-Wave Bursts from Soft Gamma Repeaters
PHYSICAL REVIEW LETTERS
2008; 101 (21)
Abstract
We present a LIGO search for short-duration gravitational waves (GWs) associated with soft gamma ray repeater (SGR) bursts. This is the first search sensitive to neutron star f modes, usually considered the most efficient GW emitting modes. We find no evidence of GWs associated with any SGR burst in a sample consisting of the 27 Dec. 2004 giant flare from SGR 1806-20 and 190 lesser events from SGR 1806-20 and SGR 1900+14. The unprecedented sensitivity of the detectors allows us to set the most stringent limits on transient GW amplitudes published to date. We find upper limit estimates on the model-dependent isotropic GW emission energies (at a nominal distance of 10 kpc) between 3x10;{45} and 9x10;{52} erg depending on waveform type, detector antenna factors and noise characteristics at the time of the burst. These upper limits are within the theoretically predicted range of some SGR models.
View details for DOI 10.1103/PhysRevLett.101.211102
View details for Web of Science ID 000261141500009
View details for PubMedID 19113401
-
Room-Temperature Stable Generation of 19 Watts of Single-Frequency 532-nm Radiation in a Periodically Poled Lithium Tantalate Crystal
JOURNAL OF LIGHTWAVE TECHNOLOGY
2008; 26 (21-24): 3866-3871
View details for DOI 10.1109/JLT.2008.928396
View details for Web of Science ID 000263225000043
-
Phase stable net acceleration of electrons from a two-stage optical accelerator
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2008; 11 (10)
View details for DOI 10.1103/PhysRevSTAB.11.101301
View details for Web of Science ID 000262196700008
-
Self-phase-locked degenerate femtosecond optical parametric oscillator
OPTICS LETTERS
2008; 33 (16): 1896-1898
Abstract
We demonstrated a stable degenerate synchronously pumped femtosecond optical parametric oscillator (SPOPO) as a divide-by-2 subharmonic generator. The SPOPO exhibited passive all-optical self-phase-locking between the pump and signal/idler and thus required no external electronic feedback to produce the phase-locked subharmonic. We employed a type I phase-matched, 1-mm-long, periodically poled MgO:LiNbO3 crystal as the nonlinear gain element and an 80 MHz mode-locked Ti:sapphire laser with 180 fs pulses tuned at 775 nm as the pump. The SPOPO generated transform-limited 70 fs phase-locked output pulses centered at 1550 nm. The self-phase-locking operation was confirmed by separate beat-note measurement techniques with respect to the pump laser and with respect to an external cw laser.
View details for Web of Science ID 000259113300041
View details for PubMedID 18709125
-
Beating the spin-down limit on gravitational wave emission from the Crab pulsar
ASTROPHYSICAL JOURNAL LETTERS
2008; 683 (1): L45-L49
View details for Web of Science ID 000258621300012
-
Search of S3 LIGO data for gravitational wave signals from spinning black hole and neutron star binary inspirals
PHYSICAL REVIEW D
2008; 78 (4)
View details for DOI 10.1103/PhysRevD.78.042002
View details for Web of Science ID 000259368500006
-
Microstructure-based laser-driven free-electron laser
International Workshop on Frontiers in FEL Physics and Related Topics
ELSEVIER SCIENCE BV. 2008: 63–66
View details for DOI 10.1016/j.nima.2008.04.063
View details for Web of Science ID 000258521500016
-
Implications for the origin of GRB 070201 from LIGO observations
ASTROPHYSICAL JOURNAL
2008; 681 (2): 1419-1430
View details for Web of Science ID 000257516000052
-
Building a pocket-size electron accelerator
PHOTONICS SPECTRA
2008; 42 (7): 64-?
View details for Web of Science ID 000257967500018
-
Astrophysically triggered searches for gravitational waves: status and prospects
18th International Conference on General Relativity and Gravitation/7th Edoardo Amaldi Conference on Gravitational Waves
IOP PUBLISHING LTD. 2008
View details for DOI 10.1088/0264-9381/25/11/114051
View details for Web of Science ID 000255897200052
-
Production and characterization of attosecond electron bunch trains
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2008; 11 (6)
View details for DOI 10.1103/PhysRevSTAB.11.061301
View details for Web of Science ID 000257760300006
-
Modal frequency degeneracy in thermally loaded optical resonators
APPLIED OPTICS
2008; 47 (15): 2840-2851
Abstract
We observe power coupling from the fundamental mode to frequency-degenerate higher-order spatial modes in optical resonators illuminated with a 30 W laser. Thermally-induced modal frequency degeneracy facilitates power transfer from the fundamental mode to higher-order modes, reduces power coupling into the cavity, and triggers power fluctuations. Modeling thermoelastic deformation of a mirror's surface shows predicted modal frequency degeneracy to be in reasonable agreement with experimental observations. Predictions for the Laser Interferometer Gravitational-wave Observatory (LIGO) show that the circulating fundamental-mode power necessary for gravitational-wave detection is compromised at coating absorptions of 3.8 and 0.44 ppm for Enhanced and Advanced LIGO Fabry-Pérot cavities, respectively.
View details for Web of Science ID 000256691500013
View details for PubMedID 18493291
-
A joint search for gravitational wave bursts with AURIGA and LIGO
CLASSICAL AND QUANTUM GRAVITY
2008; 25 (9)
View details for DOI 10.1088/0264-9381/25/9/095004
View details for Web of Science ID 000255897000005
-
Three-dimensional grain boundary spectroscopy in transparent high power ceramic laser materials
OPTICS EXPRESS
2008; 16 (9): 5965-5973
Abstract
Using confocal Raman and fluorescence spectroscopic imaging in 3-dimensions, we show direct evidence of inhomogeneous Nd(3+) distribution across grain boundaries (GBs) in Nd(3+):YAG laser ceramics. It is clearly shown that Nd(3+) segregation takes place at GBs leading to self-fluorescence quenching which affects a volume fraction as high as 20%. In addition, we show a clear trend of increasing spatial inhomogeneities in Nd(3+) concentration when the doping levels exceeds 3 at%, which is not detected by standard spectrometry techniques. These results could point the way to further improvements in what is already an impressive class of ceramic laser materials.
View details for Web of Science ID 000255663000001
View details for PubMedID 18545297
-
Search for gravitational waves from binary inspirals in S3 and S4 LIGO data
PHYSICAL REVIEW D
2008; 77 (6)
View details for DOI 10.1103/PhysRevD.77.062002
View details for Web of Science ID 000254544500006
-
Proposed dielectric-based microstructure laser-driven undulator
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2008; 11 (3)
View details for DOI 10.1103/PhysRevSTAB.11.030704
View details for Web of Science ID 000254902400005
-
Search for gravitational waves associated with 39 gamma-ray bursts using data from the second, third, and fourth LIGO runs
PHYSICAL REVIEW D
2008; 77 (6)
View details for DOI 10.1103/PhysRevD.77.062004
View details for Web of Science ID 000254544500008
-
Charge neutralization in vacuum for non-conducting and isolated objects using directed low-energy electron and ion beams
CLASSICAL AND QUANTUM GRAVITY
2008; 25 (3)
View details for DOI 10.1088/0264-9381/25/3/035004
View details for Web of Science ID 000252930900005
-
Measurement of high photodarkening resistance in heavily Yb3+-doped phosphate fibres
ELECTRONICS LETTERS
2008; 44 (1): 14-15
View details for DOI 10.1049/el:20082698
View details for Web of Science ID 000252959400010
-
Measurement of high-photodarkening resistance in phosphate fiber doped with 12% Yb2O3
Conference on Fiber Lasers V
SPIE-INT SOC OPTICAL ENGINEERING. 2008
View details for DOI 10.1117/12.774938
View details for Web of Science ID 000255547100040
-
10-Watt, Single-mode, Single-frequency, 1.03 mu m Yb3+-doped Phosphate Fiber Amplifier
Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference (CLEO/QELS 2008)
IEEE. 2008: 230–231
View details for Web of Science ID 000260498400116
-
All-sky search for periodic gravitational waves in LIGO S4 data
PHYSICAL REVIEW D
2008; 77 (2)
View details for DOI 10.1103/PhysRevD.77.022001
View details for Web of Science ID 000252864000005
-
Design of transverse Nd doping profiles in transparent YAG ceramics for edge-pumped laser geometries
Conference on Solid State Lasers XVII
SPIE-INT SOC OPTICAL ENGINEERING. 2008
View details for DOI 10.1117/12.784319
View details for Web of Science ID 000255549800046
-
Search for gravitational-wave bursts in LIGO data from the fourth science run
CLASSICAL AND QUANTUM GRAVITY
2007; 24 (22): 5343-5369
View details for DOI 10.1088/0264-9381/24/22/002
View details for Web of Science ID 000251428400002
-
Yb : YAG master oscillator power amplifier for remote wind sensing
APPLIED OPTICS
2007; 46 (30): 7552-7565
Abstract
We have demonstrated key advances towards a solid-state laser amplifier at 1.03 microm for global remote wind sensing. We designed end-pumped zig-zag slab amplifiers to achieve high gain. We overcame parasitic oscillation limitations using claddings on the slab's total internal reflection (TIR) and edge surfaces to confine the pump and signal light by TIR and allow leakage of amplified spontaneous emission rays that do not meet the TIR condition. This enables e3, e5, and e8 single-, double-, and quadruple-pass small-signal amplifier gain, respectively. The stored energy density is 15.6 J/cm3, a record for a laser-diode end-pumped Yb:YAG zig-zag slab amplifier.
View details for Web of Science ID 000251047200028
View details for PubMedID 17952195
-
Investigation of the suitability of silicate bonding for facet termination in active fiber devices
OPTICS EXPRESS
2007; 15 (20): 13003-13022
Abstract
We demonstrate that silicate bonding an optical flat to the output facet of an active fiber device can increase the reliability of high-peak power systems and subsantially reduce the effective feedback at the termination of a double-clad fiber. We determine the bonding parameters and conditions that maximize the optical damage threshold of the bond and minimize the Fresnel reflection from the bond. At 1-mum wavelength, damage thresholds greater than 70 J/cm(2) are demonstrated for 25-ns pulses. We also measured Fresnel reflections less than -63 dB off the bond. Finally, we determined that the strength of the bond is sufficient for most operating environments.
View details for Web of Science ID 000250006700047
View details for PubMedID 19550570
-
Upper limit map of a background of gravitational waves
PHYSICAL REVIEW D
2007; 76 (8)
View details for DOI 10.1103/PhysRevD.76.082003
View details for Web of Science ID 000250621400008
-
Searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: Results from the second LIGO science run
PHYSICAL REVIEW D
2007; 76 (8)
View details for DOI 10.1103/PhysRevD.76.082001
View details for Web of Science ID 000250621400006
-
Search for gravitational wave radiation associated with the pulsating tail of the SGR 1806 20 hyperflare of 27 December 2004 using LIGO
PHYSICAL REVIEW D
2007; 76 (6)
View details for DOI 10.1103/PhysRevD.76.062003
View details for Web of Science ID 000249786900012
-
Upper limits on gravitational wave emission from 78 radio pulsars
PHYSICAL REVIEW D
2007; 76 (4)
View details for DOI 10.1103/PhysRevD.76.042001
View details for Web of Science ID 000249155800009
-
First cross-correlation analysis of interferometric and resonant-bar gravitational-wave data for stochastic backgrounds
PHYSICAL REVIEW D
2007; 76 (2)
View details for DOI 10.1103/PhysRevD.76.022001
View details for Web of Science ID 000248545200002
-
High-extinction-ratio resonant cavity polarizer for quantum-optics measurements
APPLIED OPTICS
2007; 46 (18): 3850-3855
Abstract
The use of a high-finesse Fabry-Perot ring cavity with an odd number of reflections as a high-extinction-ratio resonant polarizer is shown. Experimental results from quantum-noise measurements using resonant cavities as spatial and spectral filters and precision polarizers are presented.
View details for Web of Science ID 000247256700025
View details for PubMedID 17538683
-
Linearly polarized, 3.35 W narrow-linewidth, 1150 nm fiber master oscillator power amplifier for frequency doubling to the yellow
OPTICS LETTERS
2007; 32 (11): 1530-1532
Abstract
A high-power linearly polarized Yb-doped silica fiber master oscillator power amplifier at 1150 nm is reported. It produced 3.35 W cw and 2.33 W of average power in 1 micros pulses at a 100 kHz repetition rate, both with 8 pm linewidth. This is the first report, to the best of our knowledge, of a high-power Yb-doped fiber amplifier at a wavelength longer than 1135 nm. The pulsed output was frequency doubled in a bulk periodically poled near-stoichiometric LiTaO(3) chip to generate 976 mW of average power at 575 nm with an overall system optical-to-optical efficiency of 9.8% with respect to launched pump power.
View details for Web of Science ID 000247756600062
View details for PubMedID 17546178
-
Optical properties and ferroelectric engineering of vapor-transport-equilibrated, near-stoichiometric lithium tantalate for frequency conversion
JOURNAL OF APPLIED PHYSICS
2007; 101 (9)
View details for DOI 10.1063/1.2723867
View details for Web of Science ID 000246567900008
-
Searching for a stochastic background of gravitational waves with the laser interferometer gravitational-wave observatory
ASTROPHYSICAL JOURNAL
2007; 659 (2): 918-930
View details for Web of Science ID 000245774700005
-
Thermal and fluid processes of a thin melt zone during femtosecond laser ablation of glass: the formation of rims by single laser pulses
JOURNAL OF PHYSICS D-APPLIED PHYSICS
2007; 40 (5): 1447-1459
View details for DOI 10.1088/0022-3727/40/5/021
View details for Web of Science ID 000245283100041
-
Wavefront distortion of the reflected and diffracted beams produced by the thermoelastic deformation of a diffraction grating heated by a Gaussian laser beam
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
2007; 24 (3): 659-668
Abstract
It may be advantageous in advanced gravitational-wave detectors to replace conventional beam splitters and Fabry-Perot input mirrors with diffractive elements. In each of these applications, the wavefront distortions produced by the absorption and subsequent heating of the grating can limit the maximum useful optical power. We present data on the wavefront distortions induced in a laser probe beam for both the reflected and diffracted beams from a grating that is heated by a Gaussian laser beam and compare these results to a simple theory of the wavefront distortions induced by thermoelastic deformations.
View details for Web of Science ID 000244407300010
View details for PubMedID 17301855
-
2.6-watt average-power mode-locked ceramic Nd : YAG laser
Conference on Optical Components and Materials IV
SPIE-INT SOC OPTICAL ENGINEERING. 2007
View details for DOI 10.1117/12.714311
View details for Web of Science ID 000246050500009
-
Proposed few-cycle laser-particle accelerator structure
IEEE Particle Accelerator Conference
IEEE. 2007: 2419–2421
View details for Web of Science ID 000255096303008
-
Timing stability and control at the E163 laser acceleration experiment
IEEE Particle Accelerator Conference
IEEE. 2007: 511–513
View details for Web of Science ID 000255096300171
-
Measurement of the stimulated Brillouin scattering gain coefficient of a phosphate fiber
Conference on Optical Components and Materials IV
SPIE-INT SOC OPTICAL ENGINEERING. 2007
View details for DOI 10.1117/12.714310
View details for Web of Science ID 000246050500017
-
Initial laser acceleration experiments of the E163 program at SLAC
IEEE Particle Accelerator Conference
IEEE. 2007: 4337–4341
View details for Web of Science ID 000255096304359
-
Proposed tabletop laser-driven coherent X-ray source
IEEE Particle Accelerator Conference
IEEE. 2007: 3531–3533
View details for Web of Science ID 000255096304113
-
Optical wakefield from a Photonic Bandgap fiber accelerator
IEEE Particle Accelerator Conference
IEEE. 2007: 2350–2352
View details for Web of Science ID 000255096302253
-
A proposed tabletop atto-second pulse coherent X-ray source
ULTRAFAST PHENOMENA XV
2007; 88: 33-35
View details for Web of Science ID 000250104700011
-
LISA gravitational reference sensors
TeV Particle Astrophysics II Workshop 2006
IOP PUBLISHING LTD. 2007: 272–275
View details for DOI 10.1088/1742-6596/60/1/059
View details for Web of Science ID 000246508400059
-
Inverse-transition radiation laser acceleration experiments at slac
IEEE Particle Accelerator Conference
IEEE. 2007: 2416–2418
View details for Web of Science ID 000255096303007
-
20 W single-mode Yb3+-doped phosphate fiber laser
OPTICS LETTERS
2006; 31 (22): 3255-3257
Abstract
We report the demonstration of the first, to our knowledge, cladding-pumped continuous-wave Yb(3+)-doped phosphate-glass fiber laser. Phosphate hosts are of interest because they can be much more heavily doped than silica, and because of the possibility that they may have a higher photodarkening threshold. In an 84.6 cm double-clad fiber doped with 12 wt. % of Yb(2)O(3) and laser-diode pumped at 940 nm, nearly 20 W of single-mode 1.07 microm output power was generated with 60.2 W of absorbed pump power. The measured dependence of the output power on pump power is in excellent agreement with simulations.
View details for Web of Science ID 000241799700012
View details for PubMedID 17072388
-
Proposed few-optical cycle laser-driven particle accelerator structure
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2006; 9 (11)
View details for DOI 10.1103/PhysRevSTAB.9.111301
View details for Web of Science ID 000243168000003
-
Zigzag slabs for solid-state laser amplifiers: batch fabrication and parasitic oscillation suppression
APPLIED OPTICS
2006; 45 (14): 3340-3351
Abstract
We have developed a 100 W class Nd:YAG master oscillator power amplifier system based in part on an end-pumped zigzag slab power amplifier. This amplifier incorporates parasitic oscillation suppression by using roughened edges and achieves a small-signal gain coefficient (g(0)l) of 8.06. We describe a novel technique for suppression of parasitic oscillations using claddings on slab edges that significantly increases g(0)l to 11.63 and increases the single-pass extracted power in a power amplifier by 50%. Commercial use of these zigzag slab amplifiers has been limited by the time and cost of production. We describe a new batch fabrication technique that improves the quality and significantly reduces the cost of zigzag slabs.
View details for Web of Science ID 000237467000018
View details for PubMedID 16676040
-
Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries
PHYSICAL REVIEW D
2006; 73 (10)
View details for DOI 10.1103/PhysRevD.73.102002
View details for Web of Science ID 000237951100005
-
LED deep UV source for charge management of gravitational reference sensors
6th Edoardo Amaldi Conference on Gravitational Waves
IOP PUBLISHING LTD. 2006: S141–S150
View details for DOI 10.1088/0264-9381/23/8/S19
View details for Web of Science ID 000237844800020
-
Kelvin probe measurements: investigations of the patch effect with applications to ST-7 and LISA
CLASSICAL AND QUANTUM GRAVITY
2006; 23 (7): 2665-2680
View details for DOI 10.1088/0264-9381/23/7/026
View details for Web of Science ID 000236932700026
-
Search for gravitational waves from binary black hole inspirals in LIGO data
PHYSICAL REVIEW D
2006; 73 (6)
View details for DOI 10.1103/PhysRevD.73.062001
View details for Web of Science ID 000236466100004
-
Efficient yellow-light generation by frequency doubling a narrow-linewidth 1150 nm ytterbium fiber oscillator
OPTICS LETTERS
2006; 31 (3): 347-349
Abstract
A linearly polarized, narrow-linewidth, diode-pumped, Yb-doped silica-fiber oscillator operating at 1150 nm was frequency doubled to produce 40 mW of 575 nm radiation. The oscillator generated 89 mW of cw linearly polarized output power and was tunable over 0.80 nm. The laser output was coupled to a periodically poled LiNbO3 waveguide that converted 67% of the coupled power to the yellow. The system was fully integrated, with no free-space optics, and had an overall optical-to-optical efficiency of 7.0% with respect to the incident diode-laser pump power.
View details for Web of Science ID 000234961100019
View details for PubMedID 16480204
-
Grating fabrication for gravitational-wave interferometers and LISA GRS
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 359–363
View details for Web of Science ID 000243875700054
-
Spectral and power stability tests of deep UV LEDs for AC charge management
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 215–219
View details for Web of Science ID 000243875700031
-
Using an optical fiber fed Littrow cavity as a displacement sensor for use in drag-free satellites
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 334–338
View details for Web of Science ID 000243875700049
-
Electrostatic sensing and forcing electronics performance for the LISA Pathfinder gravitational reference sensor
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 576–582
View details for Web of Science ID 000243875700087
-
A robust, symmetric grating angular sensor for space flights
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 384–388
View details for Web of Science ID 000243875700059
-
Progress in developing the modular gravitational reference sensor
6th International Laser Interferometer Space Antenna
AMER INST PHYSICS. 2006: 515–521
View details for Web of Science ID 000243875700078
-
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts
PHYSICAL REVIEW D
2005; 72 (12)
View details for DOI 10.1103/PhysRevD.72.122004
View details for Web of Science ID 000234274900008
-
Proof-of-principle experiment for laser-driven acceleration of relativistic electrons in a semi-infinite vacuum
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2005; 8 (12)
View details for DOI 10.1103/PhysRevSTAB.8.121301
View details for Web of Science ID 000234051700001
-
High-harmonic inverse-free-electron-laser interaction at 800 nm
PHYSICAL REVIEW LETTERS
2005; 95 (19)
Abstract
We present the first direct observation of a higher-order inverse-free-electron-laser (IFEL) interaction. Interaction at the fourth, fifth, and sixth harmonics is observed from an IFEL operating at 800 nm. The harmonic spacing, relative harmonic strength, and transverse beam overlap of the interaction are all in good agreement with tracking simulations.
View details for DOI 10.1103/PhysRevLett.95.194801
View details for Web of Science ID 000233062900027
View details for PubMedID 16383986
-
First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
PHYSICAL REVIEW D
2005; 72 (10)
View details for DOI 10.1103/PhysRevD.72.102004
View details for Web of Science ID 000233608800007
-
Search for gravitational waves from galactic and extra-galactic binary neutron stars
PHYSICAL REVIEW D
2005; 72 (8)
View details for DOI 10.1103/PhysRevD.72.082001
View details for Web of Science ID 000232936700002
-
Search for gravitational waves from primordial black hole binary coalescences in the galactic halo
PHYSICAL REVIEW D
2005; 72 (8)
View details for DOI 10.1103/PhysRevD.72.082002
View details for Web of Science ID 000232936700003
-
Visible-laser acceleration of relativistic electrons in a semi-infinite vacuum
PHYSICAL REVIEW LETTERS
2005; 95 (13)
Abstract
We demonstrate a new particle acceleration mechanism using 800 nm laser radiation to accelerate relativistic electrons in a semi-infinite vacuum. The experimental demonstration is the first of its kind and is a proof of principle for the concept of laser-driven particle acceleration in a structure loaded vacuum. We observed up to 30 keV energy modulation over a distance of 1000 lambda, corresponding to a 40 MeV/m peak gradient. The energy modulation was observed to scale linearly with the laser electric field and showed the expected laser-polarization dependence. Furthermore, as expected, laser acceleration occurred only in the presence of a boundary that limited the laser-electron interaction to a finite distance.
View details for DOI 10.1103/PhysRevLett.95.134801
View details for Web of Science ID 000232060100021
View details for PubMedID 16197142
-
Upper limits on gravitational wave bursts in LIGO's second science run
PHYSICAL REVIEW D
2005; 72 (6)
View details for DOI 10.1103/PhysRevD.72.062001
View details for Web of Science ID 000232230100009
-
Search for gravitational waves associated with the gamma ray burst GRB030329 using the LIGO detectors
PHYSICAL REVIEW D
2005; 72 (4)
View details for DOI 10.1103/PhysRevD.72.042002
View details for Web of Science ID 000231565000003
-
Advanced gravitational reference sensor for high precision space interferometers
5th International LISA Symposium/38th ESLAB Symposium
IOP PUBLISHING LTD. 2005: S287–S296
View details for DOI 10.1088/0264-9381/22/10/021
View details for Web of Science ID 000230230100022
-
Quantum noise measurements in a continuous-wave laser-diode-pumped Nd : YAG saturated amplifier
OPTICS LETTERS
2005; 30 (10): 1195-1197
Abstract
We present measurements of the power noise due to optical amplification in a Nd:YAG free-space traveling-wave amplifier as the amplifier transitions from the linear regime into the heavily saturated regime. The quantum noise behavior is demonstrated by saturating the gain of a 100-W class zigzag slab amplifier with a high-power beam and measuring the power noise detected by a single-spatial-mode probe beam traversing the same optical path through the amplifier.
View details for Web of Science ID 000229011800037
View details for PubMedID 15943307
-
The impact of Einstein's theory of special relativity on particle accelerators
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
2005; 38 (9): S741-S752
View details for DOI 10.1088/0953-4075/38/9/020
View details for Web of Science ID 000229399800021
-
Limits on gravitational-wave emission from selected pulsars using LIGO data
PHYSICAL REVIEW LETTERS
2005; 94 (18)
Abstract
We place direct upper limits on the amplitude of gravitational waves from 28 isolated radio pulsars by a coherent multidetector analysis of the data collected during the second science run of the LIGO interferometric detectors. These are the first direct upper limits for 26 of the 28 pulsars. We use coordinated radio observations for the first time to build radio-guided phase templates for the expected gravitational-wave signals. The unprecedented sensitivity of the detectors allows us to set strain upper limits as low as a few times 10(-24). These strain limits translate into limits on the equatorial ellipticities of the pulsars, which are smaller than 10(-5) for the four closest pulsars.
View details for DOI 10.1103/PhysRevLett.94.181103
View details for Web of Science ID 000229074300009
View details for PubMedID 15904354
-
Energy efficiency of an intracavity coupled, laser-driven linear accelerator pumped by an external laser
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2005; 8 (3)
View details for DOI 10.1103/PhysRevSTAB.8.031301
View details for Web of Science ID 000227616000003
-
Summary of adaptive optics at Stanford
4th International Workshop on Adaptive Optics for Industry and Medicine
SPRINGER-VERLAG BERLIN. 2005: 53–59
View details for Web of Science ID 000232738200007
-
High-harmonic inverse Free-Electron-Laser interaction at 800 nm
21st Particle Accelerator Conference (PAC)
IEEE. 2005: 2718–2720
View details for Web of Science ID 000235745202162
-
First observation of laser-driven acceleration of relativistic electrons in a semi-infinite vacuum space
21st Particle Accelerator Conference (PAC)
IEEE. 2005: 2576–2578
View details for Web of Science ID 000235745202122
-
Femtosecond laser ablation properties of borosilicate glass
JOURNAL OF APPLIED PHYSICS
2004; 96 (9): 5316-5323
View details for DOI 10.1063/1.1787145
View details for Web of Science ID 000224799300092
-
Analysis of LIGO data for gravitational waves from binary neutron stars
PHYSICAL REVIEW D
2004; 69 (12)
View details for DOI 10.1103/PhysRevD.69.122001
View details for Web of Science ID 000222681600002
-
Analysis of first LIGO science data for stochastic gravitational waves
PHYSICAL REVIEW D
2004; 69 (12)
View details for DOI 10.1103/PhysRevD.69.122004
View details for Web of Science ID 000222681600005
-
First upper limits from LIGO on gravitational wave bursts
PHYSICAL REVIEW D
2004; 69 (10)
View details for DOI 10.1103/PhysRevD.69.102001
View details for Web of Science ID 000222096200007
-
Setting upper limits on the strength of periodic gravitational waves from PSR J1939+2134 using the first science data from the GEO 600 and LIGO detectors
PHYSICAL REVIEW D
2004; 69 (8)
View details for DOI 10.1103/PhysRevD.69.082004
View details for Web of Science ID 000221277400006
-
Upper limits on the strength of periodic gravitational waves from PSR J1939+2134
5th Edoardo Amaldi Conference on Gravitational Waves
IOP PUBLISHING LTD. 2004: S671–S676
View details for DOI 10.1088/0264-9381/21/5/042
View details for Web of Science ID 000220344800043
-
Ceramic lasers: Ready for action
PHOTONICS SPECTRA
2004; 38 (2): 50-?
View details for Web of Science ID 000189170600025
-
Detector description and performance for the first coincidence observations between LIGO and GEO
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
2004; 517 (1-3): 154-179
View details for DOI 10.1016/j.nima.2003.11.124
View details for Web of Science ID 000188503500015
-
Morphology of femtosecond-laser-ablated borosilicate glass surfaces
APPLIED PHYSICS LETTERS
2003; 83 (15): 3030-3032
View details for DOI 10.1063/1.1619560
View details for Web of Science ID 000185832400014
-
Wake field in dielectric acceleration structures
PHYSICAL REVIEW E
2003; 68 (3)
Abstract
In this study we present a general approach for the analysis of the wake field of a point charge moving in a vacuum tunnel bored in dielectric material that is uniform in the direction parallel to the motion of the bunch. In the transverse direction the structure surrounding the dielectric may have arbitrary geometry. A quasianalytic expression that relates the decelerating force with the first dielectric layer, the radius of the vacuum tunnel where the charge moves, and the reflection characteristics of the structure has been developed. Simulation results for a simple structure indicate that, if the effective location where the reflection occurs in the dielectric is sufficiently apart from the edge of the vacuum tunnel, it has no effect on the point charge. In fact, the decelerating field converges exponentially as this distance increases, to the asymptotic value determined by the first dielectric layer. An estimate of the trailing wake when the structure supports a specific mode is also provided.
View details for DOI 10.1103/PhysRevE.68.036502
View details for Web of Science ID 000185756400087
View details for PubMedID 14524903
-
ST-7 gravitational reference sensor: analysis of magnetic noise sources
4th International LISA Symposium
IOP PUBLISHING LTD. 2003: S109–S116
View details for Web of Science ID 000183710500014
-
Fine structure of the electron paramagnetic resonance spectrum of Fe3+ centres in LiTaO3
JOURNAL OF PHYSICS-CONDENSED MATTER
2003; 15 (2): 275-280
View details for Web of Science ID 000180989100041
-
Parametric amplification of 1.6 mu m signal in anneal- and reverse-proton exchanged waveguides
16th Annual Meeting of the IEEE Lasers and Electro-Optics Society
IEEE. 2003: 334–335
View details for Web of Science ID 000188359700169
-
Scaling laws of a dielectric optical accelerator
20th Biennial Particle Accelerator Conference
IEEE. 2003: 722–724
View details for Web of Science ID 000189498600193
-
Disturbance Reduction System: Testing technology for precision formation control
Conference on High-Contrast Imaging for Exo-Planet Detection
SPIE-INT SOC OPTICAL ENGINEERING. 2003: 221–228
View details for Web of Science ID 000182226900022
-
The disturbance reduction system: Testing technology for drag-free operation
Conference on Gravitational-Wave Detection
SPIE-INT SOC OPTICAL ENGINEERING. 2003: 9–18
View details for Web of Science ID 000182225800002
-
Thermal and fluid processes of a thin melt zone during femtosecond laser ablation of glass
Conference on Photon Processing in Microelectronics and Photonics II
SPIE-INT SOC OPTICAL ENGINEERING. 2003: 335–345
View details for Web of Science ID 000184964100036
-
The ORION facility
20th Biennial Particle Accelerator Conference
IEEE. 2003: 1858–1860
View details for Web of Science ID 000189498600574
-
Test mass materials for a new generation of gravitational wave detectors
Conference on Gravitational-Wave Detection
SPIE-INT SOC OPTICAL ENGINEERING. 2003: 292–297
View details for Web of Science ID 000182225800032
-
Dielectric Bragg accelerator
20th Biennial Particle Accelerator Conference
IEEE. 2003: 728–730
View details for Web of Science ID 000189498600195
-
Squeezed singly resonant second-harmonic generation in periodically poled lithium niobate
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
2002; 19 (7): 1592-1598
View details for Web of Science ID 000176818200013
-
Results from the Stanford 10 m Sagnac interferometer
4th Edoardo Amaldi Conference on Gravitational Waves
IOP PUBLISHING LTD. 2002: 1585–89
View details for Web of Science ID 000175178400049
-
X-ray-induced phase transformation in congruent and vapor-transport-equilibrated lithium tantalate and lithium niobate
APPLIED PHYSICS LETTERS
2002; 80 (6): 1037-1039
View details for Web of Science ID 000173612900045
-
Domain kinetics in congruent and stoichiometric lithium niobate
10th International Meeting on Ferroelectricity
TAYLOR & FRANCIS LTD. 2002: 189–194
View details for Web of Science ID 000176861800033
-
Optical accelerator: Scaling laws and figures of merit
10th Workshop on Advanced Accelerator Concepts
AMER INST PHYSICS. 2002: 310–323
View details for Web of Science ID 000180453300034
-
Femtosecond laser machining of fluidic microchannels for miniaturized bioanalytical systems
Conference on Photon Processing in Microelectronics and Photonics
SPIE-INT SOC OPTICAL ENGINEERING. 2002: 212–217
View details for Web of Science ID 000177443500023
-
Deformable mirrors for high-power lasers
Conference on High-Resolution Wavefront Controls - Methods, Devices, and Applications III
SPIE-INT SOC OPTICAL ENGINEERING. 2002: 55–63
View details for Web of Science ID 000175311500008
-
Deformable mirror development at Stanford university
Conference on High-Resolution Wavefront Controls - Methods, Devices, and Applications III
SPIE-INT SOC OPTICAL ENGINEERING. 2002: 1–12
View details for Web of Science ID 000175311500001
-
Wide-bandwidth 25-dB amplitude noise suppression in a pump-and-signal-resonant optical parametric oscillator
OPTICS LETTERS
2001; 26 (14): 1087-1089
Abstract
We present a pump-and-signal-resonant optical parametric oscillator that provides 25 dB of amplitude noise suppression of the transmitted pump beam from dc to 20 kHz. The upper frequency range of the optical limiter increases as the pump power is increased, up to 1 MHz with 580 mW of input power. The amount of noise suppression is limited by pump-depletion effects. The upper frequency range is limited by the temporal response of the device. We present a numerical analysis that predicts this behavior.
View details for Web of Science ID 000169858800017
View details for PubMedID 18049528
-
Yb : YAG and Nd : YAG edge-pumped slab lasers
OPTICS LETTERS
2001; 26 (13): 986-988
Abstract
Experimental demonstrations of two edge-pumped zigzag slab lasers are presented. The Nd:YAG slab laser generated 127 W of multimode output power with 300W of pump power. Preliminary results with a Yb:YAG slab produced 46 W of output power with 315W of pump power. The edge-pumped slab design permits symmetric conduction cooling and efficient pump absorption and accepts large-numerical-aperture pump sources.
View details for Web of Science ID 000169495300010
View details for PubMedID 18040509
-
Bidirectional, synchronously pumped, ring optical parametric oscillator
OPTICS LETTERS
2001; 26 (5): 265-267
Abstract
We report the operation of a bidirectional femtosecond pulsed ring optical parametric oscillator based on periodically poled lithium niobate, pumped alternately with nonsimultaneous pulses from a Ti:sapphire mode-locked laser. A beat note between the two counterpropagating beams attests to a gyro response without dead band. The sensitivity of the device to differential phase changes is demonstrated by measurement of the nonlinear index of lithium niobate.
View details for Web of Science ID 000167183400005
View details for PubMedID 18040296
-
Active laser amplifier distortion compensation
Topical Meeting on Advanced Solid-State Lasers
OPTICAL SOC AMERICA. 2001: 682–684
View details for Web of Science ID 000173833500141
-
Recent achievements in domain engineering in lithium niobate and lithium tantalate
5th European Conference on Applications of Polar Dielectrics (ECAPD-V)
TAYLOR & FRANCIS LTD. 2001: 191–202
View details for Web of Science ID 000177214900026
-
Formation of self-organized nanodomain patterns during spontaneous backswitching in lithium niobate
6th International Symposium on Ferroic Domains and Mesoscopic Structures (ISFD-6)
TAYLOR & FRANCIS LTD. 2001: 661–70
View details for Web of Science ID 000177213800013
-
Frequency-switched heterodyne cavity ringdown spectroscopy
OPTICS LETTERS
2000; 25 (12): 920-922
Abstract
When the frequency of light coupled into a cavity is suddenly shifted, the radiation emanating from the input port of the previously excited cavity can beat with the reflection of the frequency-shifted input on the surface of a photodetector. When the beat frequency is stable, the time decay of the resulting optical heterodyne signal can be used to measure intracavity absorption spectra with near quantum-limited sensitivity.
View details for Web of Science ID 000087642400018
View details for PubMedID 18064227
-
Polarization Sagnac interferometer with a reflective grating beam splitter
OPTICS LETTERS
2000; 25 (10): 722-724
Abstract
All-reflective interferometric gravitational-wave detector configurations with a diffraction grating as a power beam splitter have been proposed to reduce thermal lensing. We demonstrate the use of a diffraction grating as a polarization beam splitter in a zero-area polarization Sagnac interferometer.
View details for Web of Science ID 000086991900014
View details for PubMedID 18064163
-
Edge pumping drives slab-laser performance
LASER FOCUS WORLD
2000; 36 (3): 63-?
View details for Web of Science ID 000085821800024
-
Edge-pumped quasi-three-level slab lasers: Design and power scaling
IEEE JOURNAL OF QUANTUM ELECTRONICS
2000; 36 (2): 205-219
View details for Web of Science ID 000085393000013
-
A laser-locked cavity ring-down spectrometer employing an analog detection scheme
8th International Conference on Ion Sources (ICIS 99)
AMER INST PHYSICS. 2000: 347–53
View details for Web of Science ID 000085115100005
-
Nanoscale backswitched domain patterning in lithium niobate
APPLIED PHYSICS LETTERS
2000; 76 (2): 143-145
View details for Web of Science ID 000084541000005
-
Regular ferroelectric domain array in lithium niobate crystals for nonlinear optic applications
9th European Meeting on Ferroelectricity (EMF-9)
TAYLOR & FRANCIS LTD. 2000: 129–44
View details for Web of Science ID 000088137800013
-
Silicon deformable mirrors and CMOS-based wavefront sensors
Conference on High-Resolution Wavefront Control: Methods, Devices, and Appliations II
SPIE-INT SOCIETY OPTICAL ENGINEERING. 2000: 15–25
View details for Web of Science ID 000167103000003
-
All-reflective interferometry for gravitational-wave detection
3rd Edoardo Amaldi Conference on Gravitational Waves
AMER INST PHYSICS. 2000: 385–386
View details for Web of Science ID 000088786300048
-
Demonstration and power scaling of edge-pumped zig-zag slab lasers
Topical Meeting on Advanced Solid State Lasers
OPTICAL SOC AMERICA. 2000: 16–20
View details for Web of Science ID 000175262800005
-
The polarization Sagnac interferometer as a candidate configuration for an advanced detector
3rd Edoardo Amaldi Conference on Gravitational Waves
AMER INST PHYSICS. 2000: 200–203
View details for Web of Science ID 000088786300022
-
Nanosecond periodically poled lithium niobate optical parametric generator pumped at 532 nm by a single-frequency passively Q-switched Nd : YAG laser
OPTICS LETTERS
1999; 24 (22): 1608-1610
Abstract
We report an efficient, visible, nanosecond optical parametric generator of periodically poled lithium niobate pumped at 532 nm by a frequency-doubled, diode-pumped, passively Q -switched, single-mode Nd:YAG laser with 90-muJ pulse energy. The signal radiation is tunable from 637 to 593 nm. The maximum signal-conversion efficiency is 23%. Optical parametric amplification of a He-Ne laser at 632.8 nm is also studied.
View details for Web of Science ID 000083745900023
View details for PubMedID 18079879
-
Domain kinetics in the formation of a periodic domain structure in lithium niobate
PHYSICS OF THE SOLID STATE
1999; 41 (10): 1681-1687
View details for Web of Science ID 000083295700024
-
Backswitch poling in lithium niobate for high-fidelity domain patterning and efficient blue light generation
APPLIED PHYSICS LETTERS
1999; 75 (12): 1673-1675
View details for Web of Science ID 000082547100007
-
Continuous-wave quasi-phase-matched generation of 60 mW at 465 nm by single-pass frequency doubling of a laser diode in backswitch-poled lithium niobate
OPTICS LETTERS
1999; 24 (18): 1293-1295
Abstract
We report continuous-wave single-pass second-harmonic generation (SHG) in 4-mum -period 0.5-mm-thick backswitch-poled lithium niobate. Pump sources at 920-930 nm include both Ti:sapphire and diode-oscillator-amplifier lasers. SHG of a Ti:sapphire laser at 6.1%/W efficiency, producing 61 mW of power at 460 nm, is demonstrated in 50-mm-long periodically poled lithium niobate samples with a nonlinear coefficient d(eff) approximately 9pm/V, and 60 mW at 465 nm and 2.8%/W efficiency is obtained by SHG of a laser-diode source.
View details for Web of Science ID 000082832000013
View details for PubMedID 18079784
-
Polarization Sagnac interferometer with a common-path local oscillator for heterodyne detection
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1999; 16 (9): 1354-1358
View details for Web of Science ID 000082514100005
-
Polarization Sagnac interferometer with postmodulation for gravitational-wave detection
OPTICS LETTERS
1999; 24 (16): 1112-1114
Abstract
We describe a polarization Sagnac interferometer with an in-loop half-wave plate that allows signal detection at the reciprocal port of the beam splitter while maintaining the ability to detect the signal at a dark fringe. Postmodulation and balanced heterodyne detection are used to recover the signal. This topology is simple to control because of its common-path characteristics and its collinear signal and local oscillator. The robustness of this scheme to amplitude and frequency fluctuations of the laser is demonstrated. Intraloop birefringence in this interferometer acts as a loss, reducing the power on the detector. The magnitude of this loss is discussed and experimentally verified.
View details for Web of Science ID 000082076400010
View details for PubMedID 18073956
-
Dynamic response of a Fabry-Perot interferometer
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1999; 16 (4): 523-532
View details for Web of Science ID 000079633700003
-
Physical basis of the domain engineering in the bulk ferroelectrics
5th International Symposium on Ferroic Domains and Mesoscopic Structures (ISFD-5)
TAYLOR & FRANCIS LTD. 1999: 157–67
View details for Web of Science ID 000081363200022
-
The proposed interferometric-type laser-driven particle accelerators
8th Workshop on Advanced Accelerator Concepts
AMER INST PHYSICS. 1999: 581–591
View details for Web of Science ID 000082303100055
-
A cw, high-power, conduction-cooled, edge-pumped slab laser
Conference on Solid State Lasers VIII
SPIE - INT SOC OPTICAL ENGINEERING. 1999: 2–7
View details for Web of Science ID 000080658300001
-
Backswitch poling of 0.5-mm-thick lithium niobate for 6.4%/W-efficient cw second harmonic generation of 460 nm light
Topical Meeting on Advanced Solid-State Lasers
OPTICAL SOC AMERICA. 1999: 707–708
View details for Web of Science ID 000173833200137
-
A 100 W edge-pumped Nd : YAG conduction-cooled slab laser
Topical Meeting on Advanced Solid-State Lasers
OPTICAL SOC AMERICA. 1999: 9–16
View details for Web of Science ID 000173833200003
-
The laser driven particle accelerator project: Theory and experiment
8th Workshop on Advanced Accelerator Concepts
AMER INST PHYSICS. 1999: 118–127
View details for Web of Science ID 000082303100009
-
Resonant, continuous wave, sum frequency mixing of two Nd3+ lasers in periodically poled lithium niobate
LASER PHYSICS
1999; 9 (1): 293-298
View details for Web of Science ID 000078848200043
-
Domain patterning in lithium niobate using spontaneous backswitching
Conference on Laser Material Crystal Growth and Nonlinear Materials and Devices
SPIE - INT SOC OPTICAL ENGINEERING. 1999: 36–43
View details for Web of Science ID 000081054100005
-
Quantum noise in a continuous-wave laser-diode-pumped Nd : YAG linear optical amplifier
OPTICS LETTERS
1998; 23 (23): 1852-1854
Abstract
We present measurements of the power noise that is due to optical amplification in a laser-diode-pumped Nd:YAG free-space traveling-wave linear amplifier in a master-oscillator-power-amplifier configuration. The quantum noise behavior of the optical amplifier was demonstrated by use of InGaAs photodetectors in a balanced detection configuration, at a total photocurrent of 100 mA and in a frequency band from 6.25 to 15.625 MHz. The experimental results are in good agreement with predictions.
View details for Web of Science ID 000077342300020
View details for PubMedID 18091935
-
Spatial and temporal filtering of a 10-W Nd : YAG laser with a Fabry-Perot ring-cavity premode cleaner
OPTICS LETTERS
1998; 23 (21): 1704-1706
Abstract
We report on the use of a fixed-spacer Fabry-Perot ring cavity to filter spatially and temporally a 10-W laser-diode-pumped Nd:YAG master-oscillator power amplifier. The spatial filtering leads to a 7.6-W TEM (00) beam with 0.1% higher-order transverse mode content. The temporal filtering reduces the relative power fluctuations at 10 MHz to 2.8x10(-9)/ radicalHz, which is 1 dB above the shot-noise limit for 50 mA of detected photocurrent.
View details for Web of Science ID 000076646900023
View details for PubMedID 18091890
-
16-mu m infrared generation by difference-frequency mixing in diffusion-bonded-stacked GaAs
OPTICS LETTERS
1998; 23 (13): 1010-1012
Abstract
Tunable 90-ps 15.6-17.6-microm coherent radiation was generated by means of difference-frequency mixing in diffusion-bonded-stacked GaAs. The sample consisted of 24 alternately rotated layers with a total length of 6 mm and with low optical loss to achieve third-order quasi-phase matching. The wavelength-tuning curve was close to the theoretical prediction, demonstrating that the bonding process maintained nonlinear optical phase matching over the entire interaction length. Maximum conversion efficiency of 0.7%, or 5% internal quantum efficiency, was measured at 16.6 microm, consistent with the theoretical predictions.
View details for Web of Science ID 000074593000010
View details for PubMedID 18087412
-
Acceleration-field calculation for a structure-based laser-driven linear accelerator
REVIEW OF SCIENTIFIC INSTRUMENTS
1998; 69 (7): 2629-2632
View details for Web of Science ID 000075279200007
-
Effects of wafer thermostability and wafer-holding materials on optical loss in GaAs annealing
JOURNAL OF APPLIED PHYSICS
1998; 83 (10): 5552-5554
View details for Web of Science ID 000073773600083
-
The physics experiment for a laser-driven electron accelerator
19th International Free Electron Laser Conference/4th FEL Users Workshop
ELSEVIER SCIENCE BV. 1998: 316–21
View details for Web of Science ID 000074395200063
-
All-reflective Michelson, Sagnac, and Fabry-Perot interferometers based on grating beam splitters
OPTICS LETTERS
1998; 23 (8): 567-569
Abstract
All-reflective Michelson, Sagnac, and Fabry-Perot interferometers based on grating beam splitters are experimentally demonstrated at a wavelength of 1064 nm. A 1200-groove/mm grating diffracting 0 and -1 orders with an efficiency of 48.2% for each order was used as a near-50/50 beam splitter. The all-reflective Sagnac and Michelson interferometers were formed by reintroducing both of the diffracted beams back to the grating. The Fabry-Perot interferometer was formed in a Littrow configuration by using a 1700-groove/mm grating with a blazing efficiency of 91% as a cavity coupler. These interferometers encompass all the fundamental configurations of all-reflective laser interferometric gravitational-wave detectors, promising improved wave-front quality by avoiding volume thermal effects in transmissive optics under high-power laser illumination.
View details for Web of Science ID 000073055500001
View details for PubMedID 18084578
-
Continuous-wave 532-nm-pumped singly resonant optical parametric oscillator based on periodically poled lithium niobate
OPTICS LETTERS
1998; 23 (3): 168-170
Abstract
We report a continuous-wave (cw) 532-nm-pumped singly resonant optical parametric oscillator (SRO) based on periodically poled lithium niobate. The pump source is a commercial 5-W cw diode-pumped, multilongitudinal-mode, intracavity-doubled Nd:YVO(4) laser. Using a four-mirror ring SRO cavity and single-pass pumping, we achieved subwatt internal oscillation threshold, 56% quantum efficiency, and output tuning from 917 to 1266 nm.
View details for Web of Science ID 000071691100008
View details for PubMedID 18084448
-
Improved GaAs bonding process for quasi-phase-matched second harmonic generation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
1998; 145 (1): 366-371
View details for Web of Science ID 000071382900067
-
Micromachined silicon deformable mirror
SPIE Conference on Adaptive Optical System Technologies
SPIE-INT SOC OPTICAL ENGINEERING. 1998: 896–901
View details for Web of Science ID 000076793400097
-
42%-efficient single-pass cw second-harmonic generation in periodically poled lithium niobate
OPTICS LETTERS
1997; 22 (24): 1834-1836
Abstract
We present a full-wafer fabrication process for periodically poled lithium niobate with a 6.5-mum domain period. Samples that were 53 mm long and 0.5 mm thick were obtained with this process for single-pass cw 1064-nm Nd:YAG second-harmonic generation. These samples exhibited 78% of the ideal nonlinear coefficient, had a measured conversion efficiency of 8.5% /W in the low-power limit, and produced 2.7 W of cw 532-nm output with 6.5 W of cw input, which corresponds to 42% power conversion efficiency.
View details for Web of Science ID 000071030800002
View details for PubMedID 18188379
-
Balanced heterodyne signal extraction in a postmodulated Sagnac interferometer at low frequency
OPTICS LETTERS
1997; 22 (19): 1485-1487
Abstract
We describe a balanced-heterodyne postmodulated Sagnac interferometer signal extraction method that is suitable for gravitational wave detection. The method is simple to implement by placement of a polarization-selective modulator after the beam splitter in the dark port of the interferometer. The postmodulated Sagnac interferometer retains its common path advantage and exhibits insensitivity to laser frequency noise below, at, and above the heterodyne frequency. Balanced detection reduces sensitivity to laser amplitude noise. In this scheme mirror displacement signals were rf demodulated and observed from 0.2 to 10kHz.
View details for Web of Science ID A1997XZ06600013
View details for PubMedID 18188276
-
Polarization-based balanced heterodyne detection method in a Sagnac interferometer for precision phase measurement
OPTICS LETTERS
1997; 22 (17): 1359-1361
Abstract
We describe a balanced heterodyne detection method for a Sagnac interferometer that uses a polarization-dependent beam splitter. The signal and the local oscillator are orthogonally polarized components of a single laser beam, permitting the detection of the signal by subtraction of two photocurrents produced in appropriate polarization projections. Using this scheme, we experimentally demonstrate a phase measurement with a sensitivity of 9x10(-10) rad/ radicalHz. The measurement is robust in the presence of laser frequency noise, as a result of preserving the common-path nature of the Sagnac interferometer, and of laser-amplitude noise, as a result of balanced detection.
View details for Web of Science ID A1997XU42500027
View details for PubMedID 18188239
-
Diffusion bonding of GaAs wafers for nonlinear optics applications
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
1997; 144 (4): 1439-1441
View details for Web of Science ID A1997WX09000061
-
Modeling of quasi-three-level lasers and operation of cw Yb:YAG lasers
APPLIED OPTICS
1997; 36 (9): 1867-1874
Abstract
We present modeling studies of quasi-three-level laser oscillators, the validity of which was revealed by Ti:Al(2)O(3)-pumped Yb:YAG laser experiments, and these results are shown to be in excellent agreement with the theory. As much as 75% slope efficiency was obtained with a hemispherical laser cavity. Previous modeling calculations of laser performance have been valid only for certain special cases, restricting application to TEM(00) Gaussian beam pumping and lasing profiles. This analysis may be applied to other longitudinally pumped quasi-three-level laser media in which the modes are not only TEM(00) Gaussian beams but also other higher-order transverse modes, including the top-hat pumping profile that can be used to model transverse pumping schemes.
View details for Web of Science ID A1997WN59800004
View details for PubMedID 18250874
-
Diode-pumped tunable Yb:YAG miniature lasers at room temperature: Modeling and experiment
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
1997; 3 (1): 100-104
View details for Web of Science ID A1997XE89500017
-
Modeling of efficient mode matching and thermal-lensing effect on a laser-beam coupling into a mode-cleaner cavity
Conference on Modeling and Simulation of Higher-Power Laser Systems IV
SPIE-INT SOC OPTICAL ENGINEERING. 1997: 57–68
View details for Web of Science ID A1997BH79W00006
-
A proposed dielectric-based laser-driven electron accelerator using crossed cylindrical laser focusing
7th Workshop on Advanced Accelerator Concepts (AAC 96)
AMER INST PHYSICS. 1997: 538–46
View details for Web of Science ID A1997BJ69X00050
-
Single axial mode operation of resonantly pumped Yb:YAG microchip lasers
ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS
1996; 79 (12): 64-70
View details for Web of Science ID A1996XG31000009
-
A proposed high-gradient laser-driven electron accelerator using crossed cylindrical laser focusing
APPLIED PHYSICS LETTERS
1996; 69 (15): 2175-2177
View details for Web of Science ID A1996VL18400009
-
93% pump depletion, 3.5-W continuous-wave, singly resonant optical parametric oscillator
OPTICS LETTERS
1996; 21 (17): 1336-1338
Abstract
We report two cw, singly resonant optical parametric oscillator (OPO) configurations based on periodically poled lithium niobate that result in significantly higher efficiency and output power than in previous studies. Using four-mirror OPO cavities and pumping with a 1.064-microm Nd:YAG laser, we observe 93% pump depletion and obtain ~86% of the converted pump photons as useful idler output. The single-beam, in-the-bucket idler output power of 3.55 W at 3.25 microm corresponds to ~80% of quantum-limited performance. We measure and compare the amplitude noise and spectral bandwidth of the two configurations. We also demonstrate >1 W of tunable cw output over the 3.3-3.9-microm spectral range.
View details for Web of Science ID A1996VE31000008
View details for PubMedID 19876344
-
Continuous-wave singly resonant optical parametric oscillator based on periodically poled LiNbO3
OPTICS LETTERS
1996; 21 (10): 713-715
Abstract
We report a continuous-wave singly resonant optical parametric oscillator (OPO) based on periodically poled lithium niobate. The simple, two-mirror OPO, pumped by a 1.064-microm Nd:YAG laser, had a 2.6-4.5-W threshold and an output of >1.2 W at 3.3 microm and was tuned over 1.45-1.62 microm (signal) and 3.98-3.11 microm (idler). The noise characteristics and the spectral properties of the device are described.
View details for Web of Science ID A1996UJ92300007
View details for PubMedID 19876134
-
Sagnac interferometer for gravitational-wave detection
PHYSICAL REVIEW LETTERS
1996; 76 (17): 3053-3056
View details for Web of Science ID A1996UF74400003
-
Multigrating quasi-phase-matched optical parametric oscillator in periodically poled LiNbO3
OPTICS LETTERS
1996; 21 (8): 591-593
Abstract
We report a widely tunable quasi-phase-matched optical parametric oscillator that uses periodically poled LiNbO(3)with a multigrating structure. The device is tuned by translation of the crystal through the resonator and pump beam, with no realignment needed. With a 1.064-microm acousto-optically Q-switched Nd:YAG pumplaser, we produced noncritically phase-matched tunable IR output from 1.36 to 4.83 microm. The threshold was 6 microJ for a 26-mm interaction length. The extraordinary polarization of LiNbO(3) has better IR transmission than does the ordinary polarization, permitting operation at longer wavelengths with d(33) quasi-phase matching than with conventional Type I birefringent phase matching.
View details for Web of Science ID A1996UE61700015
View details for PubMedID 19876093
-
Proposed structure for a crossed-laser beam, GeV per meter gradient, vacuum electron linear accelerator
APPLIED PHYSICS LETTERS
1996; 68 (6): 753-755
View details for Web of Science ID A1996TT66300009
-
Broadly tunable mid-IR radiation source based on difference frequency mixing of high power wavelength-tunable laser diodes in bulk periodically poled LiNbO3
ELECTRONICS LETTERS
1996; 32 (3): 218-219
View details for Web of Science ID A1996UL76800054
-
Diffusion bonding of GaAs wafers for nonlinear optics applications
24th State-of-the-Art Program on Compound Semiconductors (SOTAPOCS XXIV), at the 189th Meeting of the Electrochemical-Society
ELECTROCHEMICAL SOCIETY INC. 1996: 175–80
View details for Web of Science ID A1996BJ91N00019
-
Design for a GeV per meter, laser-driven electron accelerator
Conference on Generation, Amplification, and Measurement of Ultrashort Laser Pulses III
SPIE - INT SOC OPTICAL ENGINEERING. 1996: 210–219
View details for Web of Science ID A1996BF61C00024
-
Progress in quasi-phasematched optical parametric: Oscillators using periodically poled LiNbO3
Conference on Nonlinear Frequency Conversion - Materials, Devices, and Applications
SPIE - INT SOC OPTICAL ENGINEERING. 1996: 216–226
View details for Web of Science ID A1996BF87D00026
-
Squeezing in a quasi-phase-matched LiNbO3 waveguide
7th Rochester Conference on Coherence and Quantum Optics
PLENUM PRESS DIV PLENUM PUBLISHING CORP. 1996: 477–478
View details for Web of Science ID A1996BG08Q00112
-
CW DIODE-PUMPED OPTICAL PARAMETRIC OSCILLATOR IN BULK PERIODICALLY POLED LINBO3
ELECTRONICS LETTERS
1995; 31 (21): 1869-1870
View details for Web of Science ID A1995TA92000053
-
SQUEEZING IN A QUASI-PHASE-MATCHED LINBO3 WAVE-GUIDE
OPTICS LETTERS
1995; 20 (15): 1649-1651
Abstract
We report traveling-wave quadrature squeezing at 1064 nm in a quasi-phase-matched LiNbO(3) waveguide, avoiding the gain-induced diffraction encountered in bulk squeezing experiments. The 10-mm-long singlemode waveguide parametric amplifier exhibited a gain of 1.9, averaged over the 20-ps mode-locked pulses, with only 0.5 W of peak pump power at 532 nm. Independent waveguides were employed for the degenerate parametric amplifier squeezer and for the second-harmonic generator that produced the pump for the parametric amplifier. We measured phase-sensitive amplification versus pump power and found close agreement with theory. The observed 14% squeezing correlates closely with the predicted value, based on the measured phase-sensitive amplification and 40% overall detection efficiency. Impedance-matched electrically resonant detection was used to boost our squeezing measurement signals substantially above the background level.
View details for Web of Science ID A1995RM76000021
View details for PubMedID 19862112
-
FREQUENCY AND INTENSITY NOISE IN AN INJECTION-LOCKED, SOLID-STATE LASER
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1995; 12 (2): 328-334
View details for Web of Science ID A1995QF76300015
-
NEW APPLICATIONS EMERGE FOR NONLINEAR-OPTICAL MATERIALS
PHOTONICS SPECTRA
1995; 29 (1): 103-104
View details for Web of Science ID A1995QC49300040
-
QUASI-PHASE-MATCHED 1.064-MU-M-PUMPED OPTICAL PARAMETRIC OSCILLATOR IN BULK PERIODICALLY POLED LINBO3
OPTICS LETTERS
1995; 20 (1): 52-54
View details for Web of Science ID A1995QA38900018
-
Broadly tunable coherent mid-IR sources based on difference frequency mixing of high power laser diodes in periodically poled LiNbO3
1995 Annual/8th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 95)
IEEE. 1995: B312–B313
View details for Web of Science ID A1995BE49N00320
-
Quasi-phase-matched 1.064-microm-pumped optical parametric oscillator in bulk periodically poled LiNbO(3).
Optics letters
1995; 20 (1): 52-54
Abstract
We report a quasi-phase-matched optical parametric oscillator, using bulk periodically poled LiNbO(3). The optical parametric oscillator, pumped by a 1.064-microm Q-switched Nd:YAG laser, was temperature tuned over the wavelength range 1.66-2.95 microm. The oscillation threshold of approximately 0.1 mJ was more than a factor of 10 below the damage limit. The LiNbO(3) crystal, fabricated by application of an electric field to a sample with liquid and metal surface electrodes, was 0.5 mm thick with a 5.2-mm interaction length and a quasi-phase-matched period of 31 microm.
View details for PubMedID 19855794
-
QUASI-PHASEMATCHED OPTICAL PARAMETRIC OSCILLATORS USING BULK PERIODICALLY POLED LINBO3
Conference on Solid State Lasers and Nonlinear Crystals, at Photonics West 95
SPIE-INT SOC OPTICAL ENGINEERING. 1995: 154–162
View details for Web of Science ID A1995BC94Z00021
-
Proposed waveguide structure for laser driven electron acceleration
6th Advanced Accelerator Concepts Workshop
AIP PRESS. 1995: 156–162
View details for Web of Science ID A1995BE17F00011
-
THE HYPERFINE-STRUCTURE OF THE I-127(2) P(119)35-0 TRANSITION
OPTICS COMMUNICATIONS
1994; 111 (3-4): 253-258
View details for Web of Science ID A1994PJ45500011
-
CONTINUOUS-WAVE TOTAL-INTERNAL-REFLECTION OPTICAL PARAMETRIC OSCILLATOR PUMPED AT 1064 NM
OPTICS LETTERS
1994; 19 (14): 1046-1048
Abstract
We report what is to our knowledge the first cw 1064-nm-pumped optical parametric oscillator (OPO), using a critically phase-matched (theta(pm) = 45.5 degrees ), monolithic total-internal-reflection, doubly resonant OPO fabricated from congruent LiNbO(3). Frustrated total-internal-reflection provides variable output coupling for the signal and the idler. The measured finesse of 6000 at 2014 nm implies a round-trip power loss of 0.1%. The low round-trip power losses compensate the 2 degrees Poynting vector walk-off and give a threshold of 130 mW. A passive thermal feedback mechanism causes the OPO to oscillate stably in a single axial-mode pair for more than 30 min. The OPO output tunes in 0.1-nm steps from 2040 to 2225 nm by tuning the pump frequency.
View details for Web of Science ID A1994NW48300012
View details for PubMedID 19844528
-
1.9-W CW RING-CAVITY KTP SINGLY RESONANT OPTICAL PARAMETRIC OSCILLATOR
OPTICS LETTERS
1994; 19 (7): 475-477
Abstract
We report high-power and single-frequency operation of a continuous-wave singly resonant potassium titanyl phosphate (KTiOPO(4)) optical parametric oscillator in a ring-cavity configuration. The ring singly resonant optical parametric oscillator threshold is 4.3 W. When the oscillator is pumped by 6.7 W of 532-nm radiation from an 11.2-W single-frequency resonantly doubled Nd:YAG laser, 1.9 W of single-axial-mode output is generated at the idler wavelength of 1039 nm.
View details for Web of Science ID A1994NC78800017
View details for PubMedID 19844345
-
ABSOLUTE FREQUENCY STABILIZATION OF DIODE-PUMPED ND-YAG LASERS
LASER PHYSICS
1994; 4 (2): 387-391
View details for Web of Science ID A1994NP60600025
-
DESIGN AND CHARACTERIZATION OF A 5.5-W, CW, INJECTION-LOCKED, FIBER-COUPLED, LASER-DIODE-PUMPED ND-YAG MINIATURE-SLAB LASER
OPTICS LETTERS
1994; 19 (2): 114-116
View details for Web of Science ID A1994MR00700014
View details for PubMedID 19829562
-
FREQUENCY STABILIZATION AND HIGH-RESOLUTION SPECTROSCOPY USING FREQUENCY-DOUBLED ND-YAG LASERS
11th International Conference on Laser Spectroscopy
AIP PRESS. 1994: 305–7
View details for Web of Science ID A1994BA06J00065
-
INVESTIGATIONS OF DIFFUSION-BONDED STACKED GAAS FOR INFRARED QUASI-PHASEMATCHED PARAMETRIC OSCILLATION
Conference on Nonlinear Optics for High-Speed Electronics and Optical Frequency Conversion
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 316–326
View details for Web of Science ID A1994BA89H00033
-
AMPLITUDE AND FREQUENCY STABILITY OF A 5-W INJECTIN-LOCKED, LASER-DIODE PUMPED, ND-YAG MINIATURE-SLAB LASER
Topical Meeting on Advanced Solid-State Lasers
OPTICAL SOC AMERICA. 1994: 296–298
View details for Web of Science ID A1994BB93D00071
-
FREQUENCY STABILIZATION OF THE 1064-NM ND-YAG LASERS TO DOPPLER-BROADENED LINES OF IODINE
APPLIED OPTICS
1993; 32 (36): 7382-7386
Abstract
A diode-laser-pumped Nd:YAG laser is frequency stabilized by locking its frequency-doubled output to the center of unsaturated (Doppler-broadened) transitions of the (127)I(2) molecule. The successive two-sample deviation of the laser frequency (root Allan variance) is kept below 5.67 kHz, or 2 parts in 10(11) of the laser frequency, for averaging times between 10 ms and 40 s. This locking technique is simpler and requires less laser power than locking to Doppler-free lines.
View details for Web of Science ID A1993MU15000005
View details for PubMedID 20861952
-
LASER HETERODYNE SPECTROSCOPY OF I-127(2) HYPERFINE-STRUCTURE NEAR 532 NM
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1993; 10 (11): 1990-1997
View details for Web of Science ID A1993MF95900003
-
DIFFUSION-BONDED STACKED GAAS FOR QUASI-PHASE-MATCHED 2ND-HARMONIC GENERATION OF A CARBON-DIOXIDE LASER
ELECTRONICS LETTERS
1993; 29 (22): 1942-1944
View details for Web of Science ID A1993NE96800027
-
IODINE SPECTROSCOPY AND ABSOLUTE FREQUENCY STABILIZATION WITH THE 2ND-HARMONIC OF THE 1319-NM ND-YAG LASER
OPTICS LETTERS
1993; 18 (20): 1757-1759
Abstract
We have frequency doubled a 1319-nm Nd:YAG laser in a quasi-phase-matched LiNbO(3) waveguide and used the asymptotically equal to1-mW second-harmonic output to investigate the (127)I(2) transitions near 660 nm. We reached submegahertz laser-frequency stability at a (vacuum) wavelength of 1319.098 nm by locking the second harmonic to the center of the P(48)6-6 transition.
View details for Web of Science ID A1993MA88600023
View details for PubMedID 19823508
-
POWER AND SPECTRAL CHARACTERISTICS OF CONTINUOUS-WAVE PARAMETRIC OSCILLATORS - THE DOUBLY TO SINGLY RESONANT TRANSITION
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1993; 10 (9): 1684-1695
View details for Web of Science ID A1993LV98600024
-
QUADRUPLY RESONANT OPTICAL PARAMETRIC OSCILLATION IN A MONOLITHIC TOTAL-INTERNAL-REFLECTION RESONATOR
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1993; 10 (9): 1696-1707
View details for Web of Science ID A1993LV98600025
-
LONG-TERM STABILITY OF 2 DIODE-LASER-PUMPED NONPLANAR RING LASERS INDEPENDENTLY STABILIZED TO 2 FABRY-PEROT INTERFEROMETERS
OPTICS LETTERS
1993; 18 (12): 947-949
Abstract
We have locked two 1064-nm diode-laser-pumped Nd:YAG lasers to two ultralow-expansion glass-ceramic Fabry-Perot interferometers by using the Pound-Drever discriminator technique. The interferometers have finesses of approximately 200,000 and 5-kHz linewidths and are housed in separate temperature-stabilized vacuum vessels. Allan variance measurements of the beat note between the two lasers are as low as 10(-14) for delay times between 0.5 and 2 s and increase with the time interval for times longer than 2 s, an improvement of 4 orders of magnitude over the free-running performance. Daily variations of the beat-note frequency are less than 1 MHz, which corresponds to a relative temperature change of approximately 100 mK between the interferometers.
View details for Web of Science ID A1993LF88900005
View details for PubMedID 19823254
-
CONTINUOUS-WAVE SINGLY RESONANT OPTICAL PARAMETRIC OSCILLATOR PUMPED BY A SINGLE-FREQUENCY RESONANTLY DOUBLED ND-YAG LASER
OPTICS LETTERS
1993; 18 (12): 971-973
Abstract
We report what is to our knowledge the first demonstration of a continuous-wave singly resonant optical parametric oscillator based on potassium titanyl phosphate. The pump source used is a single-frequency resonantly doubled Nd:YAG laser. By double passing the pump through the crystal, we achieved a minimum oscillation threshold of 1.4 W. With 3.2 W of incident pump power, a maximum 1.07 W of nonresonant idler power was generated. Spectral measurement reveals that the singly resonant optical parametric oscillator operates consistently in a single axial mode with much relaxed axial mode hop tolerance to cavity length and pump-frequency fluctuations compared with doubly resonant optical parametric oscillators previously demonstrated.
View details for Web of Science ID A1993LF88900013
View details for PubMedID 19823262
-
CW OPTICAL PARAMETRIC OSCILLATORS - 25 YEARS YOUNG
6th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 93)
I E E E. 1993: 702–703
View details for Web of Science ID A1993BA47C00330
-
FREQUENCY STABILITY MEASUREMENTS OF 2 NONPLANAR RING OSCILLATORS INDEPENDENTLY STABILIZED TO 2 FABRY-PEROT INTERFEROMETERS
CONF ON FREQUENCY-STABILIZED LASERS AND THEIR APPLICATIONS
SPIE - INT SOC OPTICAL ENGINEERING. 1993: 278–288
View details for Web of Science ID A1993BY44J00030
-
CW OPTICAL PARAMETRIC OSCILLATION NEAR 2.1 MU-M, PUMPED BY 1064 NM
6th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 93)
IEEE. 1993: 105–106
View details for Web of Science ID A1993BA47C00046
-
DIODE-PUMPED SOLID-STATE LASERS
NATO Advanced Study Institute on Solid State Lasers: New Developments and Applications
PLENUM PRESS DIV PLENUM PUBLISHING CORP. 1993: 99–120
View details for Web of Science ID A1993BZ73T00007
-
2ND HARMONIC-GENERATION AT 972 NM USING A DISTRIBUTED BRAGG REFLECTION SEMICONDUCTOR-LASER
APPLIED PHYSICS LETTERS
1992; 61 (23): 2741-2743
View details for Web of Science ID A1992KB23800001
-
ABSOLUTE FREQUENCY STABILIZATION OF DIODE-LASER-PUMPED NDYAG LASERS TO HYPERFINE TRANSITIONS IN MOLECULAR-IODINE
OPTICS LETTERS
1992; 17 (17): 1204-1206
Abstract
Diode-laser-pumped Nd:YAG lasers were frequency stabilized by locking their frequency-doubled output to Doppler-free absorption lines of the (127)I(2) molecule. The successive two-sample deviation of the beat frequency between two independent iodine-stabilized lasers is less than 650 Hz, or 2.3 x 10(-12) of the laser frequency, for averaging times between 24 and 80 s.
View details for Web of Science ID A1992JK62100010
View details for PubMedID 19798134
-
SUBWAVELENGTH OPTICAL MAGNETIC-RESONANCE-IMAGING
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
1992; 9 (5): 683-699
View details for Web of Science ID A1992HQ47800006
-
SUB-HERTZ RELATIVE FREQUENCY STABILIZATION OF 2-DIODE LASER-PUMPED ND-YAG LASERS LOCKED TO A FABRY-PEROT-INTERFEROMETER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1992; 28 (4): 1106-1117
View details for Web of Science ID A1992HP65300046
-
FUSED-SILICA MONOLITHIC TOTAL-INTERNAL-REFLECTION RESONATOR
OPTICS LETTERS
1992; 17 (5): 378-380
View details for Web of Science ID A1992HF12800024
View details for PubMedID 19784334
-
FREQUENCY STABILIZATION OF ND YAG LASERS
10TH INTERNATIONAL CONF ON LASER SPECTROSCOPY ( TENICOLS 91 ) N
WORLD SCIENTIFIC PUBL CO PTE LTD. 1992: 365–367
View details for Web of Science ID A1992BV96Z00081
-
69% Efficient continuous-wave second-harmonic generation in lithium-rich lithium niobate.
Optics letters
1991; 16 (23): 1856-1858
Abstract
Lithium-rich lithium niobate fabricated by vapor transport equilibration is used to frequency double the output of an injection-locked Nd:YAG laser. Internal doubling efficiencies as high as 69% and powers of as much as 1.6 W are achieved by resonant external cavity second-harmonic generation. No evidence of photorefractive damage is observed at the operating temperature of 234 degrees C.
View details for PubMedID 19784161
-
69-PERCENT EFFICIENT CONTINUOUS-WAVE 2ND-HARMONIC GENERATION IN LITHIUM-RICH LITHIUM-NIOBATE
OPTICS LETTERS
1991; 16 (23): 1856-1858
View details for Web of Science ID A1991GT34700016
-
PERIODICALLY POLED LINBO3 FOR HIGH-EFFICIENCY 2ND-HARMONIC GENERATION
APPLIED PHYSICS LETTERS
1991; 59 (21): 2657-2659
View details for Web of Science ID A1991GP90600010
-
6.5-W, 532-NM RADIATION BY CW RESONANT EXTERNAL-CAVITY 2ND-HARMONIC GENERATION OF AN 18-W ND-YAG LASER IN LIB3O5
OPTICS LETTERS
1991; 16 (19): 1493-1495
Abstract
We report 6.5 W of TEM(00) cw 532-nm radiation generated by external resonant doubling in a LiB(3)O(5) crystal. An 18-W, cw, injection-locked single-frequency Nd:YAG laser was used to generate 532-nm second-harmonic output with a 3-dB heterodyne linewidth of 15 kHz.
View details for Web of Science ID A1991GH88000013
View details for PubMedID 19777011
-
2ND-ORDER SUSCEPTIBILITY IN ASYMMETRIC QUANTUM-WELLS AND ITS CONTROL BY PROTON-BOMBARDMENT
APPLIED PHYSICS LETTERS
1991; 58 (16): 1724-1726
View details for Web of Science ID A1991FH09700011
-
OPTICAL PARAMETRIC OSCILLATOR FREQUENCY TUNING AND CONTROL
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1991; 8 (3): 646-667
View details for Web of Science ID A1991FA75100020
-
3.5 WATT CW 532 NM RADIATION BY RESONANT EXTERNAL CAVITY SHG OF AN 8.5 WATT NDYAG LASER IN LBO
TOPICAL MEETING ON ADVANCED SOLID-STATE LASERS
OPTICAL SOC AMERICA. 1991: 308–310
View details for Web of Science ID A1991BW69Z00072
-
MEASUREMENT OF NONLINEAR OPTICAL COEFFICIENTS BY PHASE-MATCHED HARMONIC-GENERATION
CONF ON INORGANIC CRYSTALS FOR OPTICS, ELECTRO-OPTICS, AND FREQUENCY CONVERSION
SPIE - INT SOC OPTICAL ENGINEERING. 1991: 119–127
View details for Web of Science ID A1991BV30U00013
-
WORKSHOP ON LASERS AND OPTICS
CONF ON GRAVITATIONAL ASTRONOMY : INSTRUMENT DESIGN AND ASTROPHYSICAL PROSPECTS
WORLD SCIENTIFIC PUBL CO PTE LTD. 1991: 71–74
View details for Web of Science ID A1991BU48A00004
-
THE OUTPUT BEAM QUALITY OF A Q-SWITCHED ND-GLASS SLAB LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (12): 2138-2145
View details for Web of Science ID A1990EY43900014
-
MODE-LOCKED OPERATION OF A ND-YLF LASER AND AMPLIFICATION IN A Q-SWITCHED ND-GLASS SLAB LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (8): 1399-1404
View details for Web of Science ID A1990EF74900014
-
DIODE-PUMPED MOVING-DISK LASER - A NEW CONFIGURATION FOR HIGH AVERAGE POWER-GENERATION
OPTICAL AND QUANTUM ELECTRONICS
1990; 22: S33-S37
View details for Web of Science ID A1990DX08700004
-
UNIFORM REFRACTIVE-INDEX CLADDING FOR LINBO3 SINGLE-CRYSTAL FIBERS
APPLIED PHYSICS LETTERS
1990; 56 (20): 1931-1933
View details for Web of Science ID A1990DC93500001
-
ABSOLUTE AND RELATIVE NONLINEAR OPTICAL COEFFICIENTS OF KDP, KD-STAR-P, BAB2O4, LIIO3, MGO-LINBO3, AND KTP MEASURED BY PHASE-MATCHED 2ND-HARMONIC GENERATION
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (5): 922-933
View details for Web of Science ID A1990DR49800019
-
AVERAGE POWER LIMITS OF DIODE-LASER-PUMPED SOLID-STATE LASERS
APPLIED OPTICS
1990; 29 (12): 1765-1771
Abstract
We investigated the average power limits of diode laser pumped slab lasers and present design calculations for several laser configurations. In the laser designs, a number of diode lasers, each one of which is coupled to an optical fiber are employed to pump a solid state laser material in a zigzag slab or a disk geometry. The systems described here can produce multiple kilowatts of average output power with currently available diode lasers in a cost-effective manner.
View details for Web of Science ID A1990DA68000016
View details for PubMedID 20563080
-
DEMONSTRATION OF A LOW BANDWIDTH 1.06-MU-M OPTICAL PHASE-LOCKED LOOP FOR COHERENT HOMODYNE COMMUNICATION
IEEE PHOTONICS TECHNOLOGY LETTERS
1990; 2 (4): 294-296
View details for Web of Science ID A1990CX91400024
-
SLAB LASERS MOVE TO INCREASE POWER
LASER FOCUS WORLD
1990; 26 (4): 131-?
View details for Web of Science ID A1990CY52100024
-
TOMOGRAPHIC IMAGING OF MICROMETER-SIZED OPTICAL AND SOFT-X-RAY BEAMS
OPTICS LETTERS
1990; 15 (7): 396-398
Abstract
The knife-edge technique for measurements of micrometer-sized beams is extended to two-dimensional imaging by tomographic reconstruction of multiangular knife-edge data. Two-dimensional intensity distributions at optical (633-nm) and soft-x-ray (13.5-nm) wavelengths at the focal region of a Schwarzschild objective are presented. The resolution is limited by the 200-nm step size used in the data acquisition.
View details for Web of Science ID A1990CX03500017
View details for PubMedID 19767955
-
2-PHOTON-INDUCED BIREFRINGENCE IN POLYSILANES
CHEMICAL PHYSICS LETTERS
1990; 166 (4): 331-339
View details for Web of Science ID A1990CR48600001
-
ACTIVE FREQUENCY STABILIZATION OF A 1.062-MU-M, ND-GGG, DIODE-LASER-PUMPED NONPLANAR RING OSCILLATOR TO LESS THAN 3 HZ OF RELATIVE LINEWIDTH
OPTICS LETTERS
1990; 15 (4): 221-223
Abstract
We present results on the frequency stabilization of two diode-laser-pumped ring lasers that are independently locked to the same high-finesse interferometer. We measure the relative frequency stability by locking the lasers one free spectral range apart and observing the heterodyne beat note. The resultant beat note width of 2.9 Hz is consistent with the theoretical system noise-limited linewidth and is approximately 20 times that expected for shot-noise-limited performance.
View details for Web of Science ID A1990CP74400007
View details for PubMedID 19759763
-
FABRICATION OF BIREFRINGENT GRATINGS USING NONLINEAR POLYSILANE THIN-FILMS
OPTICS LETTERS
1990; 15 (4): 242-244
Abstract
Birefringence is shown to be induced in polysilane thin films by the process of chain scission induced by nonlinear absorption at visible wavelengths. This writable birefringence is easy to control and can be used for the fabrication of birefringent gratings and other optical devices.
View details for Web of Science ID A1990CP74400014
View details for PubMedID 19759770
-
QUASI-PHASE-MATCHED 2ND-HARMONIC GENERATION OF BLUE-LIGHT IN PERIODICALLY POLED LINBO3
APPLIED PHYSICS LETTERS
1990; 56 (2): 108-110
View details for Web of Science ID A1990CH19700003
-
2-PHOTON PROCESSES IN SUBSTITUTED POLYSILANES
4TH INTERNATIONAL CONF ON UNCONVENTIONAL PHOTOACTIVE SOLIDS ( 4TH UPS )
GORDON BREACH SCI PUBL LTD. 1990: 197–210
View details for Web of Science ID A1990DJ22300023
-
GROWTH OF OPTICAL-QUALITY SAPPHIRE SINGLE-CRYSTAL FIBERS
2ND SYMP ON OPTICAL FIBER MATERIALS AND PROCESSING
MATERIALS RESEARCH SOC. 1990: 273–278
View details for Web of Science ID A1990BR34P00037
-
SHORT PULSE INJECTION SEEDING OF Q-SWITCHED ND-GLASS LASER-OSCILLATORS - THEORY AND EXPERIMENT
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (1): 149-157
View details for Web of Science ID A1990CM10500020
-
OPTICAL-PROPERTIES OF LITHIUM-RICH LITHIUM-NIOBATE FABRICATED BY VAPOR TRANSPORT EQUILIBRATION
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (1): 135-138
View details for Web of Science ID A1990CM10500018
-
CHARACTERIZATION OF SINGLE-CRYSTAL SAPPHIRE FIBERS FOR OPTICAL POWER DELIVERY SYSTEMS
APPLIED PHYSICS LETTERS
1989; 55 (21): 2170-2172
View details for Web of Science ID A1989CA40100004
-
INJECTION LOCKING OF A 13-W CW ND-YAG RING LASER
OPTICS LETTERS
1989; 14 (21): 1189-1191
Abstract
A lamp-pumped, 13-W cw Nd:YAG ring laser at 1.064 microm is injection locked using a 40-mW single-frequency diodelaser-pumped Nd:YAG laser as the master oscillator. The phase fidelity of the injected slave to the master is measured using an all-optical technique.
View details for Web of Science ID A1989AX17300009
View details for PubMedID 19759630
-
EFFICIENT, SINGLE-AXIAL-MODE OPERATION OF A MONOLITHIC MGO-LINBO3 OPTICAL PARAMETRIC OSCILLATOR
OPTICS LETTERS
1989; 14 (20): 1134-1136
Abstract
A monolithic doubly resonant optical parametric oscillator (OPO) fabricated from MgO:LiNbO(3) was pumped by a cw, frequency-doubled, diode-laser-pumped Nd:YAG laser. The threshold for cw operation was 12 mW, and pump depletions of up to 78% were observed two times above threshold. The total OPO output power was 8.15 mW, with a conversion efficiency for the incident pump of 34% and combined conversion efficiency for the 1064-nm laser light of 14%. The OPO was temperature tuned from 1007 to 1129 nm, operated on a single-axial-mode pair over most of the range, and could be electric field tuned by as much as 38 nm near degeneracy.
View details for Web of Science ID A1989AV56600014
View details for PubMedID 19753079
-
30 HZ-LINEWIDTH, DIODE-LASER-PUMPED, ND-GGG NONPLANAR RING OSCILLATORS BY ACTIVE FREQUENCY STABILIZATION
ELECTRONICS LETTERS
1989; 25 (13): 810-812
View details for Web of Science ID A1989AD62200002
-
PHOTOIONIZATION-PUMPED GAIN AT 185NM IN A LASER-ABLATED INDIUM PLASMA
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1989; 6 (6): 1209-1216
View details for Web of Science ID A1989U943600015
-
COMPACT SCANNING SOFT-X-RAY MICROSCOPE USING A LASER-PRODUCED PLASMA SOURCE AND NORMAL-INCIDENCE MULTILAYER MIRRORS
OPTICS LETTERS
1989; 14 (11): 539-541
Abstract
We have constructed a scanning soft-x-ray microscope that uses a laser-produced plasma as the soft-x-ray source and normal-incidence multilayer-coated mirrors in a Schwarzschild configuration as the focusing optics. The microscope operates at a wavelength of 14 nm, has a spatial resolution of 0.5 microm, and has a soft-x-ray photon flux through the focus of 10(4)-10(5) sec(-1) when operated with only 170 mW of average laser power. The microscope is compact; the complete system, including the laser, fits on a single optical table.
View details for Web of Science ID A1989U834700001
View details for PubMedID 19752889
-
BARIUM BORATE OPTICAL PARAMETRIC OSCILLATOR
IEEE JOURNAL OF QUANTUM ELECTRONICS
1989; 25 (6): 1196-1199
View details for Web of Science ID A1989AC21700010
-
BLUE-LIGHT GENERATION BY FREQUENCY DOUBLING IN PERIODICALLY POLED LITHIUM-NIOBATE CHANNEL WAVE-GUIDE
ELECTRONICS LETTERS
1989; 25 (11): 731-732
View details for Web of Science ID A1989AA39800033
-
EIGENPOLARIZATION THEORY OF MONOLITHIC NONPLANAR RING OSCILLATORS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1989; 25 (4): 767-790
View details for Web of Science ID A1989U036500017
-
NONLINEAR FREQUENCY-CONVERSION ENHANCES DIODE-PUMPED LASERS
LASER FOCUS WORLD
1989; 25 (3): 77-?
View details for Web of Science ID A1989T597100020
-
OBSERVATION OF EXTREMELY LARGE QUADRATIC SUSCEPTIBILITY AT 9.6-10.8-MU-M IN ELECTRIC-FIELD-BIASED ALGAAS QUANTUM WELLS
PHYSICAL REVIEW LETTERS
1989; 62 (9): 1041-1044
View details for Web of Science ID A1989T371600016
-
Observation of extremely large quadratic susceptibility at 9.6-10.8 microm in electric-field-biased AlGaAs quantum wells.
Physical review letters
1989; 62 (9): 1041-1044
View details for PubMedID 10040409
-
2ND-HARMONIC GENERATION OF GREEN LIGHT IN PERIODICALLY POLED PLANAR LITHIUM-NIOBATE WAVE-GUIDE
ELECTRONICS LETTERS
1989; 25 (3): 174-175
View details for Web of Science ID A1989T234500002
-
MONOLITHIC MGO-LINBO3 DOUBLY RESONANT OPTICAL PARAMETRIC OSCILLATOR PUMPED BY A FREQUENCY-DOUBLED DIODE-LASER-PUMPED ND-YAG LASER
OPTICS LETTERS
1989; 14 (1): 66-68
Abstract
We have demonstrated a monolithic MgO:LiNbO(3) doubly resonant optical parametric oscillator (OPO) using an allsolid- state pump. The pump laser was a single-axial-mode monolithic Nd:YAG nonplanar ring oscillator whose diode-laser pump was modulated at 325 kHz to produce relaxation oscillation spikes to higher peak powers at 1.06 microm that were frequency doubled in a resonant cavity to 532 nm. Pump depletions for the OPO of greater than 60% were observed when pumping six times above the calculated 40-mW threshold. The OPO output was temperature tuned from 1.01 to 1.13 microm, producing single-axial-mode output over much of the range. By changing the voltage applied across the OPO, the output wavelength was scanned as much as 11 nm in 310 V.
View details for Web of Science ID A1989R542200023
View details for PubMedID 19749825
-
MONOLITHIC OPTICAL PARAMETRIC OSCILLATORS FOR QUANTUM OPTICS
6TH ROCHESTER CONF ON COHERENCE AND QUANTUM OPTICS
PLENUM PRESS DIV PLENUM PUBLISHING CORP. 1989: 787–791
View details for Web of Science ID A1989BS16R00144
-
3-DIMENSIONAL BEAM-DEFLECTION OPTICAL TOMOGRAPHY OF A SUPERSONIC JET
APPLIED OPTICS
1988; 27 (24): 5202-5212
Abstract
We report 3-D imaging of density in a supersonic expansion using beam-deflection optical tomography. Quantitative high-resolution images with absolute accuracy of 3%, dynamic range of 500:1, and spatial resolution to within a factor of 1.7 of the diffraction limit were produced with a He-Ne laser and simple apparatus. Theory shows that the spatial frequency content of beam-deflection measurements is well suited for tomographic reconstruction. The theory for the diffraction-limited resolution for tomography is presented.
View details for Web of Science ID A1988R540800037
View details for PubMedID 20539720
-
EFFICIENT MONOLITHIC MGO-LINBO3 SINGLY RESONANT OPTICAL PARAMETRIC OSCILLATOR
OPTICS LETTERS
1988; 13 (12): 1102-1104
Abstract
We have operated a monolithic MgO:LiNbO(3) singly resonant optical parametric oscillator (OPO) as both a standing-wave and a ring-geometry resonator. The OPO was pumped by the second harmonic of an amplified single-mode diode-laser-pumped Nd:YAG laser. Pump depletions of greater than 60% were observed when pumping four times greater than the 35-W threshold. The OPO output at the resonant signal tuned with temperature from 834 to 958 nm, while the corresponding idler tuned from 1.47 to 1.2 microm. The spectral characteristics of the OPO signal output and the relative merits of a standing wave versus a ring geometry are discussed.
View details for Web of Science ID A1988R274000016
View details for PubMedID 19746138
-
VISIBLE BAB2O4 OPTICAL PARAMETRIC OSCILLATOR PUMPED AT 355 NM BY A SINGLE-AXIAL-MODE PULSED-SOURCE
APPLIED PHYSICS LETTERS
1988; 53 (21): 2014-2016
View details for Web of Science ID A1988Q958500006
-
EFFICIENT 2ND HARMONIC-GENERATION OF A DIODE-LASER-PUMPED CW ND-YAG LASER USING MONOLITHIC MGO-LINBO3 EXTERNAL RESONANT CAVITIES
IEEE JOURNAL OF QUANTUM ELECTRONICS
1988; 24 (6): 913-919
View details for Web of Science ID A1988P075300009
-
CONTINUOUS-WAVE MODE-LOCKED ND-GLASS LASER PUMPED BY A LASER DIODE
OPTICS LETTERS
1988; 13 (6): 458-460
Abstract
We have demonstrated a diode-laser-pumped, cw, mode-locked Nd:glass laser oscillator. With a 0.5% output coupler the pump threshold for mode-locked operation was 22.9 mW. The mode-locked pulse width was shorter than 36.5 psec, which was the response time of the fast photodiode and the sampling oscilloscope. Diode-laser-pumped mode-locked operation was also extended to Nd:YAG.
View details for Web of Science ID A1988N681700010
View details for PubMedID 19745931
-
DIODE LASER-PUMPED SOLID-STATE LASERS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1988; 24 (6): 895-912
View details for Web of Science ID A1988P075300008
-
SPECTROSCOPY AND DIODE LASER-PUMPED OPERATION OF TM, HO-YAG
IEEE JOURNAL OF QUANTUM ELECTRONICS
1988; 24 (6): 924-933
View details for Web of Science ID A1988P075300011
-
ND-MGO-LINBO3 CONTINUOUS-WAVE LASER PUMPED BY A LASER DIODE
OPTICS LETTERS
1988; 13 (3): 209-211
Abstract
Diode-pumped laser oscillation was achieved in Nd:MgO:LiNbO(3). The absorbed pump power thresholds were as low as 1.9 mW for the high-gain or pi polarization and 8 mW for the low-gain polarization. A cw output power of 2 mW was obtained for the pi polarization at lambda = 1.085 microm for 9 mW of absorbed pump power. A slope efficiency of 37% was achieved. The diode-pumped Nd:MgO:LiNbO(3) lasers operated for extended periods of time without exhibiting any reduction in output power.
View details for Web of Science ID A1988M514600010
View details for PubMedID 19742030
-
DIODE-LASER-ARRAY-PUMPED NEODYMIUM SLAB OSCILLATORS
OPTICS LETTERS
1988; 13 (3): 204-206
Abstract
A high-power multistripe diode-laser array has been used to pump miniature zigzag slab oscillators of Nd:YAG and Nd:glass. With Nd:YAG we have demonstrated output at 1.06 microm of 70-kW peak power and 585-mW average power with an electrical-to-optical efficiency of 4%. In this experiment the Nd:glass lasers were limited to 160-mW average power and less efficiency than the Nd:YAG. The differences between these materials are discussed.
View details for Web of Science ID A1988M514600008
View details for PubMedID 19742028
-
COHERENT 70.9-NM RADIATION GENERATED IN NEON BY FREQUENCY TRIPLING THE 5TH HARMONIC OF A ND-YAG LASER
OPTICS LETTERS
1988; 13 (3): 221-223
Abstract
We have produced coherent radiation in the XUV region at 70.9 nm by frequency tripling the fifth harmonic of Nd:YAG laser radiation in neon. BaB(2)O(4) was used to generate the fifth harmonic at 212.8 nm with an output pulse energy of 20 mJ and a pulse width of 5 nsec. Subsequent frequency tripling in neon gas generated 10 W of peak power at 70.9 nm.
View details for Web of Science ID A1988M514600014
View details for PubMedID 19742034
-
ENERGY-TRANSFER AND INVERSION SATURATION IN TM,HO-YAG
JOURNAL OF LUMINESCENCE
1988; 40-1: 509-510
View details for Web of Science ID A1988M245200225
-
MEASUREMENT OF SOFT-X-RAY MULTILAYER MIRROR REFLECTANCE AT NORMAL INCIDENCE USING LASER-PRODUCED PLASMAS
APPLIED PHYSICS LETTERS
1988; 52 (4): 269-271
View details for Web of Science ID A1988L732400008
-
QUANTITATIVE 3-DIMENSIONAL OPTICAL TOMOGRAPHIC IMAGING OF SUPERSONIC FLOWS
SCIENCE
1987; 238 (4834): 1700-1702
Abstract
Three-dimensional imaging of the density of nitrogen in a supersonic expansion from a nozzle by means of beam-deflection optical tomography is described. With a very simple apparatus, images could be obtained with high absolute accuracy, high spatial resolution, and wide dynamic range.
View details for Web of Science ID A1987L276300042
View details for PubMedID 17737671
-
BEAM DEFLECTION OPTICAL TOMOGRAPHY FACILITATES FLOW-ANALYSIS
LASER FOCUS-ELECTRO-OPTICS
1987; 23 (12): 145-147
View details for Web of Science ID A1987L293300020
-
2ND-HARMONIC GENERATION OF A CONTINUOUS-WAVE DIODE-PUMPED ND-YAG LASER USING AN EXTERNALLY RESONANT CAVITY
OPTICS LETTERS
1987; 12 (12): 1014-1016
Abstract
We report 13% second-harmonic conversion efficiency of a 15-mW, cw, diode-laser-pumped Nd:YAG oscillator. 2 mW of single-axial-mode 532-mm radiation was generated by externally resonant second-harmonic generation in a monolithic MgO:LiNbO(3) nonlinear crystal cavity. The measured finesse of 450 for the monolithic external cavity indicated that absorption and scatter losses in the doubler were less than 0.8%.
View details for Web of Science ID A1987L073900013
View details for PubMedID 19741946
-
MGO-LINBO3 SINGLE-CRYSTAL FIBER WITH MAGNESIUM-ION IN-DIFFUSED CLADDING
OPTICS LETTERS
1987; 12 (11): 938-940
Abstract
A Mg-ion in-diffusion process was applied to form an optical guiding structure in LiNbO(3) single-crystal fibers. A parabolic refractive-index profile was formed in a 56-microm-diameter, c-axis MgO:LiNbO(3) fiber, yielding quasi-single-mode (two modes) propagation.
View details for Web of Science ID A1987K531500029
View details for PubMedID 19741922
-
STOICHIOMETRIC LINBO3 SINGLE-CRYSTAL FIBERS FOR NONLINEAR OPTICAL APPLICATIONS
JOURNAL OF CRYSTAL GROWTH
1987; 85 (1-2): 264-269
View details for Web of Science ID A1987L041200038
-
CONTINUOUS-WAVE OPERATION OF A ROOM-TEMPERATURE, DIODE-LASER-PUMPED, 946-NM ND-YAG LASER
OPTICS LETTERS
1987; 12 (10): 809-811
Abstract
Single-stripe diode-laser-pumped operation of a continuous-wave 946-nm Nd:YAG laser with less than 10-mW threshold has been demonstrated. A slope efficiency of 16% near threshold was shown with a projected slope efficiency well above a threshold of 34% based on results under Rhodamine 6G dye-laser pumping. Nonlinear crystals for second-harmonic generation of this source were evaluated. KNbO(3) and periodically poled LiNbO(3) appear to be the most promising.
View details for Web of Science ID A1987K181100017
View details for PubMedID 19741880
-
2ND HARMONIC-GENERATION AND ACCURATE INDEX OF REFRACTION MEASUREMENTS IN FLUX-GROWN KTIOPO4
APPLIED OPTICS
1987; 26 (12): 2390-2394
Abstract
Accurate index of refraction measurements have been performed in flux-grown KTiOPO(4). These measurements give good agreement between experiment and theory for angle phase matching in Type II second harmonic generation at 1.064 microm. These refractive-index data have allowed us to calculate the propagation angles for second harmonic generation at wavelengths of interest other than 1.064 microm such as 1.34 microm. Type II second harmonic energy conversion efficiency of 1.064 micro m of up to 59% in this material has also been demonstrated with higher efficiencies possible. Limits to conversion efficiency are discussed.
View details for Web of Science ID A1987H808600021
View details for PubMedID 20489880
-
MODELING AND CW OPERATION OF A QUASI-3-LEVEL 946 NM ND-YAG LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1987; 23 (5): 605-612
View details for Web of Science ID A1987H022700020
-
COHERENT LASER-RADAR AT 1.06 MU-M USING ND-YAG LASERS
OPTICS LETTERS
1987; 12 (4): 239-241
Abstract
A coherent laser radar system operating at the 1.06-microm Nd:YAG laser wavelength has been built and operated. A laser-diode-pumped monolithic ring laser served as the master oscillator. A single flash-lamp-pumped zigzag slab amplified the oscillator output to a power of 2.3 kW. Single-mode optical fiber was used to collect and mix the return signal with the local-oscillator output. Signals from clouds at a range of 2.7 km and from atmospheric aerosols at a range of 600 m were detected.
View details for Web of Science ID A1987G543100005
View details for PubMedID 19738851
-
FREQUENCY STABILITY AND OFFSET LOCKING OF A LASER-DIODE-PUMPED ND-YAG MONOLITHIC NONPLANAR RING OSCILLATOR
OPTICS LETTERS
1987; 12 (3): 175-177
Abstract
The frequency stability of laser-diode-pumped, monolithic Nd:YAG solid-state unidirectional nonplanar ring oscillators was studied by heterodyne measurements. We obtained cw single-axial- and transverse-mode power of 25 mW at 1064 nm at a slope efficiency of 19%. Two independent oscillators were offset locked at 17 MHz with frequency fluctuations of less than +/-40 kHz for periods of 8 min.
View details for Web of Science ID A1987G161000012
View details for PubMedID 19738830
-
BEAM-DEFLECTION OPTICAL TOMOGRAPHY OF A FLAME
OPTICS LETTERS
1987; 12 (3): 155-157
Abstract
We report three-dimensional index-of-refraction measurements in a methane-air slot diffusion flame and a methane-air slot subsonic jet using beam-deflection optical tomography. The horizontal and vertical spatial resolutions are 0.26 and 0.635 mm, respectively. The peak temperature is calculated from the index-of-refraction map for the flame and compared with thermocouple temperature measurements.
View details for Web of Science ID A1987G161000005
View details for PubMedID 19738823
-
BEAM-DEFLECTION OPTICAL TOMOGRAPHY
OPTICS LETTERS
1987; 12 (2): 72-74
Abstract
We report two-dimensional density measurements in a supersonic expansion using beam-deflection optical tomography. Quantitative, high-resolution images with absolute accuracy to 3.5% and spatial resolution to 50 microm were taken with a helium-neon laser and simple apparatus.
View details for Web of Science ID A1987F829900002
View details for PubMedID 19738796
-
V. Inorganic nonlinear materials for frequency conversion.
Applied optics
1987; 26 (2): 224-227
View details for DOI 10.1364/AO.26.000224
View details for PubMedID 20454115
-
RESEARCH ON NONLINEAR OPTICAL-MATERIALS - AN ASSESSMENT
APPLIED OPTICS
1987; 26 (2): 211-234
Abstract
The seven papers making up this assessment are based on the Workshop on Nonlinear Optical Materials held in April 1986.
View details for Web of Science ID A1987F775000016
View details for PubMedID 20454110
-
2-STEP EXCITATION AND BLUE FLUORESCENCE UNDER CONTINUOUS-WAVE PUMPING IN ND-YLF
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1986; 3 (11): 1519-1525
View details for Web of Science ID A1986E738300003
-
A PROPOSED 1-KW AVERAGE POWER MOVING SLAB ND-GLASS LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1986; 22 (10): 2052-2057
View details for Web of Science ID A1986E025800017
-
FERROELECTRIC DOMAIN-STRUCTURES IN LINBO3 SINGLE-CRYSTAL FIBERS
JOURNAL OF CRYSTAL GROWTH
1986; 78 (1): 135-143
View details for Web of Science ID A1986E625000018
-
40-W AVERAGE POWER, 30-HZ MOVING-SLAB ND - GLASS-LASER
OPTICS LETTERS
1986; 11 (10): 617-619
Abstract
A moving-slab-geometry Nd:glass laser has been designed and demonstrated. An average power output of 43.8 W has been achieved at 2.76-kW input power and at 2.06% slope efficiency. The moving-slab laser has the potential for scaling to kilowatt average power levels.
View details for Web of Science ID A1986E190100008
View details for PubMedID 19738706
-
BROADLY TUNABLE INFRARED PARAMETRIC OSCILLATOR USING AGGASE2
APPLIED PHYSICS LETTERS
1986; 49 (11): 608-610
View details for Web of Science ID A1986D946300002
-
QUANTITATIVE OPTICAL TOMOGRAPHIC IMAGING OF A SUPERSONIC JET
OPTICS LETTERS
1986; 11 (7): 413-415
Abstract
Two-dimensional quantitative images of the density of chlorine in a supersonic expansion are produced with an absolute accuracy of 5% in 150-microm pixels by using optical absorption tomography. An incoherent arc-lamp source provides ample ultraviolet radiation for high-resolution optical absorption tomographic measurements. A measurement of the chlorine absorption coefficient is reported.
View details for Web of Science ID A1986C992500003
View details for PubMedID 19730648
-
MONOLITHIC ND-YAG FIBER LASER
OPTICS LETTERS
1986; 11 (7): 437-439
Abstract
A single-crystal Nd:YAG fiber with polished and coated endfaces has been operated as a monolithic, guided-wave laser oscillator. The 47-microm-diameter, 7-mm-length fiber oscillator operated with a threshold of 3.7 mW and a slope efficiency of 10.5%. Seventy-five percent of the laser power was in the fundamental spatial mode.
View details for Web of Science ID A1986C992500011
View details for PubMedID 19730656
-
FAN-BEAM-TOMOGRAPHY NOISE THEORY
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
1986; 3 (5): 624-633
View details for Web of Science ID A1986C753800005
-
EFFICIENT GAALAS DIODE-LASER-PUMPED OPERATION OF ND-YLF AT 1.047-MU-M WITH INTRACAVITY DOBLING TO 523.6 NM
OPTICS LETTERS
1986; 11 (4): 204-206
View details for Web of Science ID A1986A700100005
View details for PubMedID 19730580
-
GENERATION OF 22 MW OF 532-NM RADIATION BY FREQUENCY DOUBLING IN TI-MGO-LINBO3 WAVE-GUIDES
OPTICS LETTERS
1986; 11 (4): 230-232
View details for Web of Science ID A1986A700100014
View details for PubMedID 19730589
-
62-DB-GAIN MULTIPLE-PASS SLAB GEOMETRY ND-YAG AMPLIFIER
OPTICS LETTERS
1986; 11 (4): 216-218
View details for Web of Science ID A1986A700100009
View details for PubMedID 19730584
-
ND-MGO-LINBO3 SPECTROSCOPY AND LASER DEVICES
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
1986; 3 (1): 140-148
View details for Web of Science ID A1986AYG4400020
-
MONOLITHIC, UNIDIRECTIONAL SINGLE-MODE ND-YAG RING LASER
OPTICS LETTERS
1985; 10 (2): 65-67
Abstract
We have built a nonplanar ring oscillator with the resonator contained entirely within a Nd:YAG crystal. When the oscillator was placed in a magnetic field, unidirectional oscillation was obtained with a pump-limited, single-axial-mode output of 163 mW.
View details for Web of Science ID A1985AAU3100005
View details for PubMedID 19724347
-
SINGLE-CRYSTAL FIBER APPLICATIONS INCLUDE NONLINEAR OPTICAL EFFECTS
LASER FOCUS-ELECTRO-OPTICS
1985; 21 (10): 60-?
View details for Web of Science ID A1985AST5800011
-
CHARACTERIZATION OF PROTON-EXCHANGED WAVE-GUIDES IN MGO-LINBO3
OPTICS LETTERS
1985; 10 (5): 235-237
Abstract
We report the fabrication and characterization of proton-exchanged waveguides in MgO-doped LiNbO(3), a high-optical-damage-threshold material. Results indicate waveguide characteristics similar to those of waveguides fabricated in undoped LiNbO(3) except for slower diffusion rates and freedom from etching of the y face when pure benzoic acid is used as a proton source. An optical-damage threshold of 70 kW/cm(2) was measured at 0.5145 microm in a MgO:LiNbO(3) waveguide, corresponding to a factor-of-2 improvement over undoped LiNbO(3).
View details for Web of Science ID A1985AGA8900014
View details for PubMedID 19724405
-
EFFICIENT 2ND HARMONIC-GENERATION OF 10-MU-M RADIATION IN AGGASE2
APPLIED PHYSICS LETTERS
1985; 47 (8): 786-788
View details for Web of Science ID A1985ARS4600008
-
THE SLAB GEOMETRY LASER .2. THERMAL EFFECTS IN A FINITE SLAB
IEEE JOURNAL OF QUANTUM ELECTRONICS
1985; 21 (8): 1195-1210
View details for Web of Science ID A1985AQB9900012
-
A GUIDED WAVE MONOLITHIC RESONATOR RUBY FIBER LASER
OPTICS COMMUNICATIONS
1985; 56 (1): 41-45
View details for Web of Science ID A1985AUY4900010
-
HIGH-SPEED HIGH-RESOLUTION FIBER DIAMETER VARIATION MEASUREMENT SYSTEM
APPLIED OPTICS
1985; 24 (15): 2362-2368
Abstract
A fiber diameter variation measurement system is described which is capable of measuring transparent fibers with 0.02% diameter resolution and 6-microm axial resolution at a measurement rate of 1 kHz and with a working distance of >100 mm. The principles of its operation are discussed in detail, and experimental confirmation of its performance is reported. A theoretical calculation of the optimum obtainable diameter resolution for a given set of experimental parameters is also presented.
View details for Web of Science ID A1985AMV8800023
View details for PubMedID 18223891
-
STATIC GAS CONDUCTION COOLED SLAB GEOMETRY ND-GLASS LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1985; 21 (5): 412-414
View details for Web of Science ID A1985AHX8400001
-
PROGRESS IN HIGH PEAK AND AVERAGE POWER LASERS FOR SOFT-X-RAY PRODUCTION
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1984; 448: 2-7
View details for Web of Science ID A1984SQ18200001
-
FREQUENCY JITTER AND LINEWIDTH OF A SINGLE-MODE MONOLITHIC ND-YAG LASER
OPTICAL SOC AMER. 1984: 438–38
View details for Web of Science ID A1984SU90700037
-
EXPERIMENTAL OPTICAL FAN BEAM TOMOGRAPHY
APPLIED OPTICS
1984; 23 (16): 2678-2685
View details for Web of Science ID A1984TF09500009
View details for PubMedID 18213056
-
OPTICAL TOMOGRAPHY - EXPERIMENTAL-VERIFICATION OF NOISE THEORY
OPTICS LETTERS
1984; 9 (7): 270-272
Abstract
Optical absorption tomography is used to map the iodine-vapor density in a plane. Two-dimensional images are obtained with 1-cm spatial resolution by using a fan-beam geometry with a 56-cm-diameter source circle. Experimental results confirm a theoretical analysis of noise in the reconstructed image, including the effects of correlated noise, position within the image, and spatial averaging.
View details for Web of Science ID A1984SX63400002
View details for PubMedID 19721567
-
PROGRESS IN OPTICAL PARAMETRIC OSCILLATORS
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1984; 461: 27-32
View details for Web of Science ID A1984SS86400006
-
POTENTIAL FOR COHERENT DOPPLER WIND VELOCITY LIDAR USING NEODYMIUM LASERS
APPLIED OPTICS
1984; 23 (15): 2477-2481
View details for Web of Science ID A1984TC46700005
View details for PubMedID 18213022
-
AGGAS2 INFRARED PARAMETRIC OSCILLATOR
APPLIED PHYSICS LETTERS
1984; 45 (4): 313-315
View details for Web of Science ID A1984TF38000005
-
LASER ASSISTED GROWTH OF OPTICAL-QUALITY SINGLE-CRYSTAL FIBERS
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1984; 460: 26-32
View details for Web of Science ID A1984TP29300005
-
THE SLAB GEOMETRY LASER .1. THEORY
IEEE JOURNAL OF QUANTUM ELECTRONICS
1984; 20 (3): 289-301
View details for Web of Science ID A1984SM30100017
-
RECENT ADVANCES IN LASER SOURCES
INSTITUTE OF PHYSICS CONFERENCE SERIES
1984: 27-36
View details for Web of Science ID A1984ACL2600003
-
LASER-HEATED MINIATURE PEDESTAL GROWTH APPARATUS FOR SINGLE-CRYSTAL OPTICAL FIBERS
REVIEW OF SCIENTIFIC INSTRUMENTS
1984; 55 (11): 1791-1796
View details for Web of Science ID A1984TV30900013
-
VARIABLE LASER ATTENUATORS - OLD AND NEW
LASER FOCUS WITH FIBEROPTIC TECHNOLOGY
1983; 19 (4): 55-?
View details for Web of Science ID A1983QK15100004
-
REDUCED THERMAL FOCUSING AND BIREFRINGENCE IN ZIG-ZAG SLAB GEOMETRY CRYSTALLINE LASERS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1983; 19 (9): 1351-1354
View details for Web of Science ID A1983RQ50600007
-
REMOTE MEASUREMENTS OF TRACE SPECIES IN THE TROPOSPHERE
AIAA JOURNAL
1982; 20 (3): 395-403
View details for Web of Science ID A1982NE08700017
-
SLAB-GEOMETRY ND-GLASS LASER PERFORMANCE STUDIES
OPTICS LETTERS
1982; 7 (9): 405-407
Abstract
Slab-geometry solid-state lasers potentially provide significant performance improvements relative to conventional rod-geometry lasers. We have used a Nd:glass laser test-bed facility to verify the predicted slab-configuration advantages.
View details for Web of Science ID A1982PE07300004
View details for PubMedID 19714037
-
GROWTH AND CHARACTERIZATION OF SINGLE-CRYSTAL REFRACTORY OXIDE FIBERS
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1982; 320: 50-55
View details for Web of Science ID A1982PX15000009
-
PROGRESS IN SLAB GEOMETRY SOLID-STATE LASERS
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1982; 335: 104-108
View details for Web of Science ID A1982QM83500016
-
COHERENT ANTI-STOKES RAMAN-SCATTERING (CARS) OF LARGE C2H4AR CLUSTERS
CHEMICAL PHYSICS LETTERS
1982; 88 (5): 477-480
View details for Web of Science ID A1982NV16900008
-
SUB-MEGAHERTZ FREQUENCY-STABILIZED ND-YAG OSCILLATOR
OPTICS LETTERS
1982; 7 (9): 408-410
Abstract
We have demonstrated a 5-msec, quasi-cw 10-Hz repetition-rate pulsed single-frequency Nd:YAG oscillator with a feedback-stabilized frequency bandwidth of less than 200 kHz.
View details for Web of Science ID A1982PE07300005
View details for PubMedID 19714038
-
HIGH-RESOLUTION CONTINUOUS-WAVE COHERENT ANTI-STOKES RAMAN-SPECTROSCOPY IN A SUPERSONIC JET
OPTICS LETTERS
1982; 7 (9): 434-436
Abstract
We have obtained high-resolution cw coherent anti-Stokes Raman spectra of the nu(1) Q branch of methane in an underexpanded supersonic jet at temperatures as low as 31.5 K and pressures below 2 Torr.
View details for Web of Science ID A1982PE07300014
View details for PubMedID 19714047
-
ELECTRONIC LINEWIDTH NARROWING METHOD FOR SINGLE AXIAL MODE-OPERATION OF Q-SWITCHED ND-YAG LASERS
OPTICS COMMUNICATIONS
1981; 37 (6): 411-416
View details for Web of Science ID A1981LX60100008
-
SIMULTANEOUS REMOTE MEASUREMENTS OF ATMOSPHERIC-TEMPERATURE AND HUMIDITY USING A CONTINUOUSLY TUNABLE IR LIDAR
APPLIED OPTICS
1981; 20 (18): 3211-3217
Abstract
The possibility of accurate remote measurements of temperature and humidity using a three-wavelength differential absorption technique is discussed. Selection of water vapor absorption lines for the measurement promises highest accuracy for temperature measurements and also allows the simultaneous determination of absolute humidity. Preliminary measurements of average temperature and humidity over a 775-m long path using a continuously tunable infrared lidar are reported. For the temperature measurements a relative accuracy of 1.4 degrees C was observed. The absolute error, however, is presently ~5 degrees C due to inaccuracies in the wavelength selection of the lidar transmitter. Humidity was measured with a 1.5% relative error limited by return signal fluctuations. The method is feasible for depth resolved measurements of temperature and humidity.
View details for Web of Science ID A1981MG52800023
View details for PubMedID 20333123
-
EFFICIENT 2ND-HARMONIC GENERATION OF ND-YAG LASER-RADIATION USING WARM PHASEMATCHING LINBO3
APPLIED PHYSICS LETTERS
1981; 39 (1): 17-19
View details for Web of Science ID A1981LW91100007
-
A 100-MU-SEC, RELIABLE, 10-HZ PULSED SUPERSONIC MOLECULAR-BEAM SOURCE
JOURNAL OF CHEMICAL PHYSICS
1981; 74 (4): 2174-2179
View details for Web of Science ID A1981LE27100017
-
OBSERVATION OF SATURATION BROADENING OF THE COHERENT ANTI-STOKES RAMAN-SPECTRUM (CARS) OF ACETYLENE IN A PULSED MOLECULAR-BEAM
CHEMICAL PHYSICS LETTERS
1981; 80 (2): 253-256
View details for Web of Science ID A1981LU69700010
-
RADIAL INTENSITY FILTERS USING RADIAL BIREFRINGENT ELEMENTS
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA
1981; 71 (10): 1264-1272
View details for Web of Science ID A1981MJ82000017
-
PULSED SUPERSONIC MOLECULAR-BEAM COHERENT ANTI-STOKES RAMAN-SPECTROSCOPY OF C2H2
OPTICS LETTERS
1981; 6 (2): 90-92
Abstract
We have obtained a high-resolution coherent anti-Stokes Raman spectrum of C(2)H(2) in a pulsed molecular beam and have used the resolved Q-branch spectrum to study the properties of the expansion. Cluster formation limited the minimum observed rotational temperature in the pure-acetylene expansion to 30 K.
View details for Web of Science ID A1981LA72800014
View details for PubMedID 19701337
-
STEADY-STATE STIMULATED RAMAN-SCATTERING BY A MULTIMODE LASER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1980; 16 (8): 850-853
View details for Web of Science ID A1980KE73900009
-
30-MHZ RESOLUTION DIGITAL WAVELENGTH METER FOR PULSED OR CW LASER SOURCES
AMER INST PHYSICS. 1980: 1566–66
View details for Web of Science ID A1980KZ64400055
-
EFFICIENT SHG OF ND-YAG WITH HIGH OPTICAL-QUALITY, HOT PHASE-MATCHING LINBO3
AMER INST PHYSICS. 1980: 1582–82
View details for Web of Science ID A1980KZ64400135
-
MULTIPLE-PASS RAMAN GAIN CELL
APPLIED OPTICS
1980; 19 (2): 301-312
Abstract
The application of a multiple-pass Herriott cell to stimulated Raman scattering (SRS) is evaluated and demonstrated. The cell combines a long optical path length with periodic refocusing to enhance Raman gain. This technique is especially useful for reducing SRS threshold pump power in the IR where the Raman gain is low. This paper presents an analysis and design procedure for a multiple-pass Raman gain cell and gives experimental results for SRS in H(2) gas.
View details for Web of Science ID A1980JB72800032
View details for PubMedID 20216846
-
COMPUTER-CONTROLLABLE WEDGED-PLATE OPTICAL-VARIABLE ATTENUATOR
APPLIED OPTICS
1980; 19 (14): 2408-2412
Abstract
A computer-controllable variable optical attenuator has been developed and tested that has a wide dynamic range, wide spectral range, and is suitable for applications with high peak and average power laser sources. The device is based on Fresnel transmission through two pairs of wedged plates. A 35-dB dynamic range, an insertion loss of 1%, a precision of better than 1% and beam offset and deflection of <0.5 mm and 0.5 mrad, respectively, are demonstrated.
View details for Web of Science ID A1980KD45000031
View details for PubMedID 20234426
-
STABLE SINGLE-AXIAL-MODE OPERATION OF AN UNSTABLE-RESONATOR ND-YAG OSCILLATOR BY INJECTION LOCKING
OPTICS LETTERS
1980; 5 (3): 96-98
View details for Web of Science ID A1980JG94200006
View details for PubMedID 19693136
-
REMOTE SINGLE-ENDED MEASUREMENTS OF ATMOSPHERIC-TEMPERATURE AND HUMIDITY AT 1.77 MU-M USING A CONTINUOUSLY TUNABLE SOURCE
OPTICS LETTERS
1980; 5 (10): 452-454
Abstract
Simultaneous remote measurements of temperature and humidity using a narrow-linewidth, continuously tunable, LiNbO(3) optical parametric oscillator as a transmitter source are reported. Relative measurement errors of 1.0 degrees C for temperature and better than 1% for humidity over a 45-sec averaging time are observed. The absolute accuracy is limited by the accuracy of available spectroscopic data.
View details for Web of Science ID A1980KJ66000015
View details for PubMedID 19693260
-
FREQUENCY-CONVERSION VIA STIMULATED RAMAN-SCATTERING
ELECTRO-OPTICAL SYSTEMS DESIGN
1980; 12 (2): 24-?
View details for Web of Science ID A1980JH38100001
-
RADIAL BIREFRINGENT ELEMENT AND ITS APPLICATION TO LASER RESONATOR DESIGN
OPTICS LETTERS
1980; 5 (11): 491-493
Abstract
We have invented a quasi-Gaussian profile-transmittance filter based on radially varying the phase retardation in a birefringent element. The radial birefringent element has been applied to resonator design and has demonstrated its usefulness in generating an improved resonator spatial-mode profile.
View details for Web of Science ID A1980KN80800013
View details for PubMedID 19701282
-
OPTICAL PARAMETRIC AMPLIFICATION
IEEE JOURNAL OF QUANTUM ELECTRONICS
1979; 15 (6): 432-444
View details for Web of Science ID A1979HB48000008
-
VERY HIGH-RESOLUTION CARS SPECTROSCOPY IN A MOLECULAR-BEAM
IEEE JOURNAL OF QUANTUM ELECTRONICS
1979; 15 (2): 63-65
View details for Web of Science ID A1979GH71100002
-
2-DIMENSIONAL REMOTE AIR-POLLUTION MONITORING VIA TOMOGRAPHY
OPTICS LETTERS
1979; 4 (3): 75-77
Abstract
We propose to apply computerized tomography to measure a two-dimensional pollutant-concentration map over an area that may contain several potential sources of pollution. A tunable-laser source at the center of the area generates secondary or virtual light sources around the perimeter of the area that play the role of x rays in conventional computerized tomography of the human body.
View details for Web of Science ID A1979GL34900001
View details for PubMedID 19687805
-
DEPENDENCE OF RAMAN GAIN ON PUMP LASER BANDWIDTH
IEEE JOURNAL OF QUANTUM ELECTRONICS
1979; 15 (7): 648-655
View details for Web of Science ID A1979HE83100023
-
OPTICAL PARAMETRIC OSCILLATOR THRESHOLD AND LINEWIDTH STUDIES
IEEE JOURNAL OF QUANTUM ELECTRONICS
1979; 15 (6): 415-431
View details for Web of Science ID A1979HB48000007
-
RESOLVED STRUCTURE WITHIN THE BROAD-BAND VIBRATIONAL RAMAN LINE OF LIQUID H2O FROM POLARIZATION COHERENT ANTI-STOKES RAMAN-SPECTROSCOPY
PHYSICAL REVIEW LETTERS
1979; 43 (5): 398-401
View details for Web of Science ID A1979HE02200024
-
16-MU-M GENERATION BY CO2-PUMPED ROTATIONAL RAMAN-SCATTERING IN H-2
OPTICS LETTERS
1978; 3 (4): 144-146
Abstract
We have generated 50 mJ of 16.9-microm radiation by stimulated rotational Raman scattering in 3 atm of H(2) gas pumped by a CO(2) TEA-laser source. Threshold was reached by injection of a few microjoules of 16.9-microm radiation generated by four-wave mixing. We achieved 25% peak power, or 40% peak photon conversion efficiency.
View details for Web of Science ID A1978FR01600009
View details for PubMedID 19684725
-
CONTINUOUSLY TUNABLE IR LIDAR WITH APPLICATIONS TO REMOTE MEASUREMENTS OF SO2 AND CH4
APPLIED OPTICS
1978; 17 (22): 3555-3561
Abstract
Remote atmospheric measurements of SO(2) and CH(4) were performed using a differential absorption lidar with a continuously tunable LiNbO(3) parametric oscillator and amplifier source in the 1.4-4.0-microm region. A comparison of injected gas concentration in a remotely located sample chamber showed excellent agreement with a SO(2) detection sensitivity of 0.9 ppm-km. An ambient level measurement of methane at the 1.66-microm overtone transition gave 3.9 +/- 0.7 ppm Performance predictions indicate an order of magnitude gain in sensitivity is possible with recently demonstrated tunable source improvements. The wide tuning range capability allows the measurement of numerous other pollutant molecules in the 1.4-4.0-microm region.
View details for Web of Science ID A1978FW64000020
View details for PubMedID 20204030
-
REMOTE SO2 MEASUREMENTS AT 4-MU-M WITH A CONTINUOUSLY TUNABLE SOURCE
OPTICS LETTERS
1978; 2 (6): 163-165
View details for Web of Science ID A1978FA61200009
View details for PubMedID 19684673
-
UNSTABLE-RESONATOR YAG
LASER FOCUS WITH FIBEROPTIC TECHNOLOGY
1978; 14 (7): 48-?
View details for Web of Science ID A1978FF43900006
-
CW COHERENT ANTI-STOKES RAMAN-SPECTRUM OF V1 BAND OF CH4 AND ITS PRESSURE-DEPENDENCE
CANADIAN JOURNAL OF PHYSICS
1978; 56 (2): 248-250
View details for Web of Science ID A1978ES41000008
-
Absolute Raman frequency measurement of the Q(2) line in D(2) using cw CARS.
Optics letters
1977; 1 (5): 149-151
Abstract
Coherent anti-Stokes Raman spectroscopy (CARS) is combined with high-resolution interferometry to measure the absolute Raman shift of the Q(2) vibrational line in D(2). The preliminary value found is 2987.237(1) +/- 0.001 cm(-1). Such precision is essential for the testing of ab initio energy-level calculations for the hydrogen isotopes.
View details for PubMedID 19680361
-
OPTICALLY PUMPED HG2 STUDIES
JOURNAL OF CHEMICAL PHYSICS
1977; 67 (6): 2536-2546
View details for Web of Science ID A1977DW96000020
-
OPTICALLY PUMPED ATOMIC MERCURY PHOTODISSOCIATION LASER
JOURNAL OF APPLIED PHYSICS
1977; 48 (6): 2505-2508
View details for Web of Science ID A1977DJ59500059
-
TUNABLE IR GENERATION BY COHERENT RAMAN MIXING IN H-2
APPLIED PHYSICS LETTERS
1977; 30 (7): 330-332
View details for Web of Science ID A1977CY68600012
-
200 MJ UNSTABLE RESONATOR ND-YAG OSCILLATOR
OPTICS COMMUNICATIONS
1977; 21 (1): 5-7
View details for Web of Science ID A1977DF72800002
-
OPTICALLY PUMPED SUPERFLUORESCENT NA-2 MOLECULAR LASER
JOURNAL OF APPLIED PHYSICS
1976; 47 (4): 1515-1518
View details for Web of Science ID A1976BL70300050
-
PYROELECTRIC SPUTTERED THIN-FILM DETECTORS
FERROELECTRICS
1976; 10 (1-4): 215-215
View details for Web of Science ID A1976BS78500043
-
ACCURATE 2ND-ORDER SUSCEPTIBILITY MEASUREMENTS OF VISIBLE AND INFRARED NONLINEAR CRYSTALS
PHYSICAL REVIEW B
1976; 14 (4): 1693-1706
View details for Web of Science ID A1976CB82800039
-
PROPOSED ATOMIC MERCURY ANTI-STOKES FREQUENCY CONVERTER
APPLIED PHYSICS LETTERS
1975; 27 (5): 300-302
View details for Web of Science ID A1975AN05600018
-
BOND-ORBITAL MODEL FOR SECOND-ORDER SUSCEPTIBILITIES
IEEE JOURNAL OF QUANTUM ELECTRONICS
1975; QE11 (1): 40-45
View details for Web of Science ID A1975V178600006
-
REMOTE AIR-POLLUTION MEASUREMENT
OPTICAL AND QUANTUM ELECTRONICS
1975; 7 (3): 147-177
View details for Web of Science ID A1975AC30500004
-
GROWTH AND APPLICATION OF [01.4] LINBO3
OPTICS COMMUNICATIONS
1974; 12 (4): 427-429
View details for Web of Science ID A1974V119900021
-
RAMAN-SPECTROSCOPY WITH INTENSE, COHERENT, ANTI-STOKES BEAMS
JOURNAL OF CHEMICAL PHYSICS
1974; 61 (6): 2466-2467
View details for Web of Science ID A1974U178400044
-
OPTICAL BACKWARD MIXING IN SODIUM NITRITE
OPTICS COMMUNICATIONS
1974; 11 (1): 57-61
View details for Web of Science ID A1974T208200017
-
EXPERIMENTAL AND THEORETICAL STUDIES OF THIRD-HARMONIC GENERATION INCHALCOPYRITE CDGEAS2
IEEE JOURNAL OF QUANTUM ELECTRONICS
1974; QE10 (1): 71-81
View details for Web of Science ID A1974R835100013
-
REMOTE DETECTION OF CO BY PARAMETRIC TUNABLE LASER
APPLIED PHYSICS LETTERS
1974; 24 (5): 242-244
View details for Web of Science ID A1974S290700013
-
SECOND-HARMONIC GENERATION AND INFRARED MIXING IN AGGASE2
APPLIED PHYSICS LETTERS
1974; 24 (2): 65-68
View details for Web of Science ID A1974S017200010
-
170 PSEC PYROELECTRIC DETECTOR
OPTICS COMMUNICATIONS
1974; 10 (4): 374-377
View details for Web of Science ID A1974T124000021
-
1.4-4-MU-M HIGH-ENERGY ANGLE-TUNED LINBO3 PARAMETRIC OSCILLATOR
APPLIED PHYSICS LETTERS
1974; 25 (9): 520-522
View details for Web of Science ID A1974U387800021
-
SUPERCONDUCTING, MAGNETICALLY LEVITATED MERRY-GO-ROUND
AMERICAN JOURNAL OF PHYSICS
1974; 42 (2): 111-125
View details for Web of Science ID A1974S075600006
-
EXPERIMENTS ON INTERACTION OF LIGHT AND SOUND FOR ADVANCED LABORATORY
AMERICAN JOURNAL OF PHYSICS
1973; 41 (3): 314-325
View details for Web of Science ID A1973P129900002
-
POLLUTANT DETECTION BY ABSORPTION USING MIE SCATTERING AND TOPOGRAPHIC TARGETS AS RETROREFLECTORS
APPLIED OPTICS
1973; 12 (7): 1496-1505
Abstract
Remote pollutant measurement by absorption using topographical reflectors or atmospheric Mie scattering as a distributed reflector offers increased range and sensitivity compared to that achieved by Raman or resonance backscattering methods. The use of opographical reflectors offers the advantage of a single-ended absorption measurement for ranges up to 10 km and sensitivities to ess than 0.01 ppm for a 10-mJ, 100-nsec transmitted pulse. The distributed Mie reflector permits absorption measurements over a depth ctau/2, determined by the pulse length tau, and allows ranging by time-of-flight measurement. For a 100-mJ, 100-nsec pulse sensitivities to 0.3 ppm at a 15-m depth resolution to ranges of 1-4 km are possible. This sensitivity is 10(4)to 10(5) times better than that achieved by the Raman method.
View details for Web of Science ID A1973P973200032
View details for PubMedID 20125553
-
OPTICALLY PUMPED MOLECULAR IODINE VAPOR-PHASE LASER
APPLIED PHYSICS LETTERS
1972; 20 (11): 463-?
View details for Web of Science ID A1972M585100025
-
SINGLY RESONANT CDSE INFRARED PARAMETRIC OSCILLATOR
APPLIED PHYSICS LETTERS
1972; 21 (5): 189-?
View details for Web of Science ID A1972N159700004
-
SUBNANOSECOND PYROELECTRIC DETECTOR
APPLIED PHYSICS LETTERS
1972; 21 (10): 512-?
View details for Web of Science ID A1972N990600024
-
PYROELECTRIC COEFFICIENT DIRECT MEASUREMENT TECHNIQUE AND APPLICATION TO A NSEC RESPONSE TIME DETECTOR
FERROELECTRICS
1972; 3 (2-3-): 333-?
View details for Web of Science ID A1972M319500033
-
EFFICIENT PARAMETRIC MIXING IN CDSE
APPLIED PHYSICS LETTERS
1971; 19 (12): 527-?
View details for Web of Science ID A1971L075500011
-
COMPARISON OF LASER METHODS FOR REMOTE DETECTION OF ATMOSPHERIC POLLUTANTS
PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS
1971; 59 (12): 1644-?
View details for Web of Science ID A1971L110200001
-
CDGEAS2-A NEW NONLINEAR CRYSTAL PHASEMATCHABLE AT 10.6 MU-M
APPLIED PHYSICS LETTERS
1971; 19 (7): 237-?
View details for Web of Science ID A1971K523400013
-
GROWTH OF HIGH-QUALITY LINBO3 CRYSTALS FROM CONGRUENT MELT
JOURNAL OF APPLIED PHYSICS
1970; 41 (6): 2320-?
View details for Web of Science ID A1970G687900009