Michel Digonnet
Professor (Research) of Applied Physics
2023-24 Courses
- Optics and Electronics Seminar
APPPHYS 483 (Aut) -
Independent Studies (3)
- Curricular Practical Training
APPPHYS 291 (Sum) - Directed Studies in Applied Physics
APPPHYS 290 (Aut, Win, Spr, Sum) - Research
PHYSICS 490 (Aut, Win, Spr)
- Curricular Practical Training
Stanford Advisees
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Postdoctoral Faculty Sponsor
Chun Wei Chen -
Doctoral Dissertation Advisor (AC)
Hongxiang Jia, Adele Zawada
All Publications
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Predictive comparison of anti-Stokes fluorescence cooling in oxide and non-oxide fiber hosts doped with Er3+ or Yb3+
SPIE-INT SOC OPTICAL ENGINEERING. 2019
View details for DOI 10.1117/12.2510859
View details for Web of Science ID 000468075900009
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Experimental investigations of spectroscopy and anti-Stokes fluorescence cooling in Yb-doped silicate fibers
SPIE-INT SOC OPTICAL ENGINEERING. 2019
View details for DOI 10.1117/12.2510889
View details for Web of Science ID 000468075900006
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High-resolution slow-light fiber Bragg grating temperature sensor with phase-sensitive detection
OPTICS LETTERS
2018; 43 (14): 3337–40
Abstract
This Letter reports a slow-light fiber Bragg grating (FBG) temperature sensor with a record temperature resolution of ∼0.3 m°C/√Hz, a drift of only ∼1 m°C over the typical duration of a measurement (∼30 s), and negligible self-heating. This sensor is particularly useful for applications requiring the detection of very small temperature changes, such as radiation-balanced lasers and the measurement of small absorptive losses using calorimetry. The sensor performance is demonstrated by measuring the heat generated in a pumped Yb-doped fiber. The sensor is also used to measure the slow-light FBG's very weak internal absorption loss (0.02 m-1), which is found to be only ∼2% of the total loss.
View details for DOI 10.1364/OL.43.003337
View details for Web of Science ID 000438867400036
View details for PubMedID 30004500
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Double-Ring Resonator Optical Gyroscopes
JOURNAL OF LIGHTWAVE TECHNOLOGY
2018; 36 (13): 2708–15
View details for DOI 10.1109/JLT.2018.2818754
View details for Web of Science ID 000432324800018
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Double-ring optical resonator gyroscopes using 3x3 fiber couplers
SPIE-INT SOC OPTICAL ENGINEERING. 2018
View details for DOI 10.1117/12.2300565
View details for Web of Science ID 000454355900009
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Model of anti-Stokes cooling in a Yb-doped fiber
SPIE-INT SOC OPTICAL ENGINEERING. 2018
View details for DOI 10.1117/12.2288616
View details for Web of Science ID 000436170100004
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In-situ fiber temperature sensor for anti-Stokes cooling measurements in doped fibers
SPIE-INT SOC OPTICAL ENGINEERING. 2018
View details for DOI 10.1117/12.2291135
View details for Web of Science ID 000436170100005
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Photonics sensing at the thermodynamic limit
OPTICS LETTERS
2017; 42 (10): 2018-2021
Abstract
We report a slow-light fiber Bragg grating strain sensor with a resolution limited by the extremely low thermodynamic phase fluctuations of the fiber. This was accomplished by using a short grating (4.5 mm) to enhance the thermal phase noise, an ultra-stable interrogation laser to lower the laser frequency noise, and a slow-light mode with a high group index (∼533) to suppress all other noise sources. We demonstrate that in a similar but longer grating (21 mm), the phase noise is suppressed in inverse proportion to the square root of the length, in accordance with theory, leading to a strain resolution as low as 130 fε/√Hz and a minimum detectable length of ∼3×10-15 m at 1.5 kHz.
View details for DOI 10.1364/OL.42.002018
View details for Web of Science ID 000401424900038
View details for PubMedID 28504738
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Aircraft-navigation-grade laser-driven FOG with Gaussian-noise phase modulation
OPTICS LETTERS
2017; 42 (8): 1600-1603
Abstract
A laser-driven fiber optic gyroscope (FOG) is demonstrated with an angular random walk noise of 5.5×10-4 deg/√h, a drift of 6.8×10-3 deg/h, and an inferred scale-factor stability of 0.15 ppm, making it, to the best of our knowledge, the first laser-driven FOG to satisfy the performance requirements for inertial navigation of commercial aircraft. This is achieved using Gaussian white noise phase modulation to broaden the linewidth of the source laser and to strongly suppress the narrow-linewidth optical carrier. The performance of this laser-driven FOG is shown to have better noise and only slightly higher drift than the same FOG driven by a conventional superfluorescent fiber source. This result is validated for two lasers with widely different intrinsic coherence.
View details for DOI 10.1364/OL.42.001600
View details for Web of Science ID 000399329600034
View details for PubMedID 28409808
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Observation of thermodynamic phase noise using a slow-light resonance in a fiber Bragg grating
SPIE-INT SOC OPTICAL ENGINEERING. 2017
View details for DOI 10.1117/12.2261148
View details for Web of Science ID 000404881800016
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Pseudo-random-bit-sequence phase modulation for reduced errors in a fiber optic gyroscope
OPTICS LETTERS
2016; 41 (24): 5664-5667
Abstract
Low noise and drift in a laser-driven fiber optic gyroscope (FOG) are demonstrated by interrogating the sensor with a low-coherence laser. The laser coherence was reduced by broadening its optical spectrum using an external electro-optic phase modulator driven by either a sinusoidal or a pseudo-random bit sequence (PRBS) waveform. The noise reduction measured in a FOG driven by a modulated laser agrees with the calculations based on the broadened laser spectrum. Using PRBS modulation, the linewidth of a laser was broadened from 10 MHz to more than 10 GHz, leading to a measured FOG noise of only 0.00073 deg/√h and a drift of 0.023 deg/h. To the best of our knowledge, these are the lowest noise and drift reported in a laser-driven FOG, and this noise is below the requirement for the inertial navigation of aircraft.
View details for DOI 10.1364/OL.41.005664
View details for Web of Science ID 000390403600012
View details for PubMedID 27973484
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Slow light in fiber Bragg gratings and its applications
JOURNAL OF PHYSICS D-APPLIED PHYSICS
2016; 49 (46)
View details for DOI 10.1088/0022-3727/49/46/463001
View details for Web of Science ID 000387230300001
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Observation of Unique Coupling-Independent Resonances in Coupled Spiral Resonators
JOURNAL OF LIGHTWAVE TECHNOLOGY
2016; 34 (13): 3087-3093
View details for DOI 10.1109/JLT.2016.2557229
View details for Web of Science ID 000379767000008
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Haltere-Like Optoelectromechanical Gyroscope
IEEE SENSORS JOURNAL
2016; 16 (11): 4274-4280
View details for DOI 10.1109/JSEN.2016.2539687
View details for Web of Science ID 000375563700036
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Photonic-Crystal-Based Fiber Hydrophone With Sub-100 mu Pa/root Hz Pressure Resolution
IEEE PHOTONICS TECHNOLOGY LETTERS
2016; 28 (2): 123-126
View details for DOI 10.1109/LPT.2015.2487498
View details for Web of Science ID 000366966900004
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Highly Sensitive Phase-Front-Modulation Fiber Acoustic Sensor
JOURNAL OF LIGHTWAVE TECHNOLOGY
2015; 33 (20)
View details for DOI 10.1109/JLT.2015.2464306
View details for Web of Science ID 000362364700001
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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
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High Purcell factor in fiber Bragg gratings utilizing the fundamental slow-light mode
OPTICS LETTERS
2015; 40 (15): 3440-3443
View details for DOI 10.1364/OL.40.003440
View details for Web of Science ID 000358802800002
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Noise and Bias Error Due to Polarization Coupling in a Fiber Optic Gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
2015; 33 (13): 2839-2847
View details for DOI 10.1109/JLT.2015.2416155
View details for Web of Science ID 000357602700018
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Effect of periodic modulation of the coupling ratios on the sensitivity of a CROW gyroscope
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
2015; 32 (6): 1120-1124
View details for DOI 10.1364/JOSAB.32.001120
View details for Web of Science ID 000355632200015
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Slowing down light to 300 km/s in a deuterium-loaded fiber Bragg grating
OPTICS LETTERS
2015; 40 (7): 1524-1527
Abstract
We report light propagation with a group velocity of only 300 km/s, a group index of 1010, and a group delay of 42 ns, in a strong apodized fiber Bragg grating 12.5 mm in length. The grating was fabricated in a deuterium-loaded fiber using a femtosecond laser and a phase mask, followed by annealing to reduce residual losses. Data analysis indicates a strong index modulation of 1.98×10(-3) and an ultra-low single-pass power loss of 0.010 dB.
View details for DOI 10.1364/OL.40.001524
View details for Web of Science ID 000352154600100
View details for PubMedID 25831375
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Sensitivity limit of a coupled-resonator optical waveguide gyroscope with separate input/output coupling
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
2015; 32 (2): 339-344
View details for DOI 10.1364/JOSAB.32.000339
View details for Web of Science ID 000349288300022
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Strong Slow-Light Resonances in Apodized Deuterium-Loaded Femtosecond Fiber Bragg Gratings
Conference on Slow Light, Fast Light, and Opto-Atomic Precision Metrology VIII
SPIE-INT SOC OPTICAL ENGINEERING. 2015
View details for DOI 10.1117/12.2081508
View details for Web of Science ID 000354263300004
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Rotation sensitivity analysis of a two-dimensional array of coupled resonators
Conference on Slow Light, Fast Light, and Opto-Atomic Precision Metrology VIII
SPIE-INT SOC OPTICAL ENGINEERING. 2015
View details for DOI 10.1117/12.2086775
View details for Web of Science ID 000354263300013
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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
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Coupled Spiral Interferometer Gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
2014; 32 (22): 4360-4364
View details for DOI 10.1109/JLT.2014.2355817
View details for Web of Science ID 000366001900001
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Coupled Spiral Interferometers
JOURNAL OF LIGHTWAVE TECHNOLOGY
2014; 32 (21): 4162-4168
View details for DOI 10.1109/JLT.2014.2348533
View details for Web of Science ID 000350552200025
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Piconewton force measurement using a nanometric photonic crystal diaphragm
OPTICS LETTERS
2014; 39 (15): 4533-4536
Abstract
A compact force fiber sensor capable of measuring forces at the piconewton level is reported. It consists of a miniature Fabry-Perot cavity fabricated at the tip a single-mode fiber, in which the external reflector is a compliant photonic-crystal diaphragm that deflects when subjected to a force. In the laboratory environment, this sensor was able to detect a force of only ∼4 pN generated by the radiation pressure of a laser beam. Its measured minimum detectable force (MDF) at 3 kHz was as weak as 1.3 pN/√Hz. In a quiet environment, the measured noise was ∼16 times lower, and the MDF predicted to be ∼76 fN/√Hz.
View details for DOI 10.1364/OL.39.004533
View details for Web of Science ID 000339878900064
View details for PubMedID 25078221
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Thermal Sensitivity of the Birefringence of Air-Core Fibers and Implications for the RFOG
JOURNAL OF LIGHTWAVE TECHNOLOGY
2014; 32 (14)
View details for DOI 10.1109/JLT.2014.2326163
View details for Web of Science ID 000342132200008
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Observation of similar to 20 ns group delay in a low-loss apodized fiber Bragg grating
OPTICS LETTERS
2014; 39 (13): 3978-3981
Abstract
We report a record group delay of 19.5 ns (an equivalent group index of 292) measured in a strongly apodized, 2 cm long, femtosecond fiber Bragg grating (FBG). This significant (~4-fold) improvement over the previous record results from the presence of a Fabry-Perot arising from the apodization. The measured group-index spectrum is well explained by a model that accounts for the apodized profiles of the index modulation, propagation loss, and birefringence of the grating. The peak power loss inferred from this model is only ~0.12 m⁻¹, which is one of the lowest values reported for an FBG.
View details for DOI 10.1364/OL.39.003978
View details for Web of Science ID 000338933200073
View details for PubMedID 24978786
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Thermal phase noise in Fabry-Perot resonators and fiber Bragg gratings
PHYSICAL REVIEW A
2014; 89 (3)
View details for DOI 10.1103/PhysRevA.89.033818
View details for Web of Science ID 000333175500011
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Sensitivity analysis of linear CROW gyroscopes and comparison to a single-resonator gyroscope
Conference on Advances in Slow and Fast Light VII
SPIE-INT SOC OPTICAL ENGINEERING. 2014
View details for DOI 10.1117/12.2047553
View details for Web of Science ID 000335905800002
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Low noise and low drift in a laser-driven fiber optic gyroscope with a 1-km coil
23rd International Conference on Optical Fibre Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2014
View details for DOI 10.1117/12.2059692
View details for Web of Science ID 000349299300013
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Miniature fiber acoustic sensors using a photonic-crystal membrane
OPTICAL FIBER TECHNOLOGY
2013; 19 (6): 785-792
View details for DOI 10.1016/j.yofte.2013.07.009
View details for Web of Science ID 000328105600010
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Time-Division-Multiplexed Interferometric Sensor Arrays
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (16): 3001-3008
View details for DOI 10.1109/JLT.2013.2272718
View details for Web of Science ID 000322145100001
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Modeling Coherent Backscattering Errors in Fiber Optic Gyroscopes for Sources of Arbitrary Line Width
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (13): 2070-2078
View details for DOI 10.1109/JLT.2013.2261283
View details for Web of Science ID 000319682100002
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Experimental Observation of Low Noise and Low Drift in a Laser-Driven Fiber Optic Gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (13): 2079-2085
View details for DOI 10.1109/JLT.2013.2261285
View details for Web of Science ID 000319682100003
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Slow-Light Fiber-Bragg-Grating Strain Sensor With a 280-femtostrain/root Hz Resolution
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (11): 1804-1808
View details for DOI 10.1109/JLT.2013.2258658
View details for Web of Science ID 000318702800002
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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
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Experimental Assessment of the Accuracy of an Advanced Photonic-Bandgap-Fiber Model
JOURNAL OF LIGHTWAVE TECHNOLOGY
2013; 31 (7): 1015-1022
View details for DOI 10.1109/JLT.2013.2238608
View details for Web of Science ID 000314694100001
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Modeling Loss and Backscattering in a Photonic-Bandgap Fiber Using Strong Perturbation
Conference on Photonic and Phononic Properties of Engineered Nanostructures III
SPIE-INT SOC OPTICAL ENGINEERING. 2013
View details for DOI 10.1117/12.2006446
View details for Web of Science ID 000322962900014
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Compact Coupled Resonators for Slow-Light Sensor Applications
Conference on Advances in Slow and Fast Light VI
SPIE-INT SOC OPTICAL ENGINEERING. 2013
View details for DOI 10.1117/12.2013174
View details for Web of Science ID 000325365200003
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Modeling and Demonstration of Thermally Stable High-Sensitivity Reproducible Acoustic Sensors
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
2012; 21 (6): 1347-1356
View details for DOI 10.1109/JMEMS.2012.2196494
View details for Web of Science ID 000311854500013
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Resonant Fiber Optic Gyroscope Using an Air-Core Fiber
JOURNAL OF LIGHTWAVE TECHNOLOGY
2012; 30 (7): 931-937
View details for DOI 10.1109/JLT.2011.2177959
View details for Web of Science ID 000300578100001
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Sensing With Slow Light in Fiber Bragg Gratings
IEEE SENSORS JOURNAL
2012; 12 (1): 156-163
View details for DOI 10.1109/JSEN.2011.2135343
View details for Web of Science ID 000297631700026
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Improving fiber optic gyroscope performance using a laser and photonic-bandgap fiber
22nd International Conference on Optical Fiber Sensors (OFS)
SPIE-INT SOC OPTICAL ENGINEERING. 2012
View details for DOI 10.1117/12.2000380
View details for Web of Science ID 000313011500009
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Slow Light in Fiber Sensors
Conference on Advances in Slow and Fast Light V
SPIE-INT SOC OPTICAL ENGINEERING. 2012
View details for DOI 10.1117/12.915293
View details for Web of Science ID 000305324800014
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Rotation Sensitivity of Gyroscopes Based on Distributed-Coupling Loop Resonators
JOURNAL OF LIGHTWAVE TECHNOLOGY
2011; 29 (20): 3048-3053
View details for DOI 10.1109/JLT.2011.2162611
View details for Web of Science ID 000295512100002
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Miniature photonic-crystal hydrophone optimized for ocean acoustics
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
2011; 129 (4): 1837-1850
Abstract
This work reports on an optical hydrophone that is insensitive to hydrostatic pressure, yet capable of measuring acoustic pressures as low as the background noise in the ocean in a frequency range of 1 Hz to 100 kHz. The miniature hydrophone consists of a Fabry-Perot interferometer made of a photonic-crystal reflector interrogated with a single-mode fiber and is compatible with existing fiber-optic technologies. Three sensors with different acoustic power ranges placed within a sub-wavelength sized hydrophone head allow a high dynamic range in the excess of 160 dB with a low harmonic distortion of better than -30 dB. A method for suppressing cross-coupling between sensors in the same hydrophone head is also proposed. A prototype was fabricated, assembled, and tested. The sensitivity was measured from 100 Hz to 100 kHz, demonstrating a sound-pressure-equivalent noise spectral density down to 12 μPa/Hz(1/2), a flatband wider than 10 kHz, and very low distortion.
View details for DOI 10.1121/1.3543949
View details for Web of Science ID 000289298600026
View details for PubMedID 21476640
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Slow Light in Fiber Bragg Gratings
Conference on Advances in Slow and Fast Light IV
SPIE-INT SOC OPTICAL ENGINEERING. 2011
View details for DOI 10.1117/12.880795
View details for Web of Science ID 000293700300010
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Fabry-Perot Fiber Sensors with Reproducible Displacement Sensitivities
16th International Conference on Optical MEMS and Nanophotonics (OMN)
IEEE. 2011: 191–192
View details for Web of Science ID 000297850100081
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Tactical-grade interferometric fiber optic gyroscope driven with a narrow-linewidth laser
21st International Conference on Optical Fiber Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2011
View details for DOI 10.1117/12.886025
View details for Web of Science ID 000293567800067
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Near shot-noise-limited performance of an open-loop laser-driven interferometric fiber optic gyroscope
21st International Conference on Optical Fiber Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2011
View details for DOI 10.1117/12.899550
View details for Web of Science ID 000293567800362
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Optimization of the splice loss between photonic-bandgap fibers and conventional single-mode fibers
OPTICS LETTERS
2010; 35 (12): 1938-1940
Abstract
To understand the loss limitations of a splice between a hollow-core fiber and a conventional fiber, we use a numerical model to calculate the expected coupling loss between the NKT Photonics' HC-1550-02 fiber and a single-mode fiber (SMF) of arbitrary step-index profile. When the SMF parameters are optimized, the splice loss is predicted to be as low as approximately 0.6 dB. This minimum is believed to be largely due to mode-shape mismatch. These predictions are confirmed experimentally by optimizing the splice loss between this photonic-bandgap fiber and five SMFs with different mode-field diameters (MFDs) and V numbers. With the SMF-28 fiber, the measured loss is 1.3 dB, in excellent agreement with theory. Using a SMF with parameters close to the optimum values (MFD=7.2 microm and V=2.16), this loss was reduced to a new record value of 0.79 dB.
View details for Web of Science ID 000279435800004
View details for PubMedID 20548345
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Birefringence Analysis of Photonic-Bandgap Fibers Using the Hexagonal Yee's Cell
IEEE JOURNAL OF QUANTUM ELECTRONICS
2010; 46 (6): 920-930
View details for DOI 10.1109/JQE.2010.2040369
View details for Web of Science ID 000275367900004
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Measurement of reduced backscattering noise in laser-driven fiber optic gyroscopes
OPTICS LETTERS
2010; 35 (2): 121-123
Abstract
We report what we believe to be the first demonstration of a laser-driven fiber optic gyroscope (FOG) built with an air-core fiber. Its phase noise is measured to be 130 murad/ radicalHz. When the sensing fiber is replaced with a conventional fiber, this figure drops to 12 murad/ radicalHz. Comparison between these values suggests that the air-core fiber gyro is most likely not limited solely by backscattering noise but by reflections at the solid-core/air-core interface. By minimizing additional noise sources and reducing the air-core fiber loss to its theoretical limit (approximately 0.1 dB/km), we predict that the backscattering noise of the laser-driven air-core FOG will drop below the level of current FOGs. Compared with commercial FOGs, this FOG will exhibit a lower noise, improved thermal and mean-wavelength stability, and reduced magnetic-field sensitivity.
View details for Web of Science ID 000273879200010
View details for PubMedID 20081941
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Coupled resonator gyroscopes: what works and what does not
Conference on Advances in Slow and Fast Light III
SPIE-INT SOC OPTICAL ENGINEERING. 2010
View details for DOI 10.1117/12.848637
View details for Web of Science ID 000284309300006
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High-Sensitivity Thermally Stable Acoustic Fiber Sensor
2010 IEEE Sensors Conference
IEEE. 2010: 1148–1151
View details for Web of Science ID 000287982100253
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Asymmetrical Spectral Response in Fiber Fabry-Perot Interferometers (vol 27, pg 5648, 2009)
JOURNAL OF LIGHTWAVE TECHNOLOGY
2010; 28 (1): 188-188
View details for DOI 10.1109/JLT.2009.2039364
View details for Web of Science ID 000273569000001
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Asymmetrical Spectral Response in Fiber Fabry-Perot Interferometers
JOURNAL OF LIGHTWAVE TECHNOLOGY
2009; 27 (24): 5648-5656
View details for DOI 10.1109/JLT.2009.2032135
View details for Web of Science ID 000272479900001
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Ring-coupled Mach-Zehnder interferometer optimized for sensing
APPLIED OPTICS
2009; 48 (26): 4874-4879
Abstract
We demonstrate numerically that the theoretical maximum sensitivity of a ring-coupled Mach-Zehnder interferometer (MZI) optimized as a sensor is about 30% greater than the optimized sensitivity of a conventional single-bus ring sensor with an identical ring perimeter and loss. The ring-coupled MZI sensor also achieves its greater sensitivity with a 25% lower circulating power, which is useful for the suppression of undesirable nonlinear effects.
View details for Web of Science ID 000270117600004
View details for PubMedID 19745847
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Performance comparison of slow-light coupled-resonator optical gyroscopes
LASER & PHOTONICS REVIEWS
2009; 3 (5): 452-465
View details for DOI 10.1002/lpor.200810052
View details for Web of Science ID 000269922000003
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Modeling of the Propagation Loss and Backscattering in Air-Core Photonic-Bandgap Fibers
JOURNAL OF LIGHTWAVE TECHNOLOGY
2009; 27 (17): 3783-3789
View details for DOI 10.1109/JLT.2008.2010876
View details for Web of Science ID 000269214300006
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Classification of the Core Modes of Hollow-Core Photonic-Bandgap Fibers
IEEE JOURNAL OF QUANTUM ELECTRONICS
2009; 45 (9): 1192-1200
View details for DOI 10.1109/JQE.2009.2019767
View details for Web of Science ID 000269389600001
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Measurements of the Birefringence and Verdet Constant in an Air-Core Fiber
JOURNAL OF LIGHTWAVE TECHNOLOGY
2009; 27 (15): 3194-3201
View details for DOI 10.1109/JLT.2008.2009546
View details for Web of Science ID 000268284200010
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Laser-driven photonic-bandgap fiber optic gyroscope with negligible Kerr-induced drift
OPTICS LETTERS
2009; 34 (7): 875-877
Abstract
We predict theoretically and confirm experimentally that the Kerr-induced phase drift of a fiber optic gyroscope (FOG) operated with a laser instead of a broadband source is virtually eliminated when the sensing coil is made of an air-core photonic-bandgap fiber. This is the first demonstration of a laser-driven FOG with a Kerr-induced drift low enough to meet the inertial navigation requirement for a 10-h transcontinental flight.
View details for Web of Science ID 000265429100005
View details for PubMedID 19340156
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Performance Limitation of a Coupled Resonant Optical Waveguide Gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
2009; 27 (1-4): 47-54
View details for DOI 10.1109/JLT.2008.927753
View details for Web of Science ID 000263768300006
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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
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Coupled resonator optical waveguide sensors: sensitivity and the role of slow light
Conference on Fiber Optic Sensors and Applications VI
SPIE-INT SOC OPTICAL ENGINEERING. 2009
View details for DOI 10.1117/12.833477
View details for Web of Science ID 000299088400016
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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
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Controlling uncoupled resonances in photonic crystals through breaking the mirror symmetry
OPTICS EXPRESS
2008; 16 (17): 13090-13103
Abstract
We show that modes in a photonic crystal slab that are uncoupled to outside radiation in a symmetric structure can be excited by breaking the mirror symmetry through introducing a protrusion on the side of the photonic crystal holes. We show that coupling to these resonances can be controlled by the strength of this asymmetry, and that it is also possible to choose among modes to couple to, through the shape of the asymmetry introduced. We provide simple theoretical arguments that explain the effect, and present eigenmode simulations and time-domain simulations. We confirm this predicted behavior with measurements on a photonic crystal with a broken mirror symmetry that exhibits an additional sharp resonant feature with a linewidth of 0.5 nm, in agreement with both calculated and simulated predictions.
View details for Web of Science ID 000259268700070
View details for PubMedID 18711548
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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
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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
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Laser-driven fiber optic gyroscope with reduced noise
19th International Conference on Optical Fibre Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2008
View details for DOI 10.1117/12.786167
View details for Web of Science ID 000258398100167
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Photonic-crystal-diaphragm-based fiber-tip hydrophone optimized for ocean acoustics
19th International Conference on Optical Fibre Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2008
View details for DOI 10.1117/12.785919
View details for Web of Science ID 000258398100003
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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
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External fibre Fabry-Perot acoustic sensor based on a photonic-crystal mirror
18th International Conference on Optical Fibre Sensors
IOP PUBLISHING LTD. 2007: 3049–54
View details for DOI 10.1088/0957-0233/18/10/S01
View details for Web of Science ID 000249982100002
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Sensitivity and stability of an air-core fibre-optic gyroscope
18th International Conference on Optical Fibre Sensors
IOP PUBLISHING LTD. 2007: 3089–97
View details for DOI 10.1088/0957-0233/18/10/S07
View details for Web of Science ID 000249982100008
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Noise analysis of an air-core fiber optic gyroscope
IEEE PHOTONICS TECHNOLOGY LETTERS
2007; 19 (17-20): 1520-1522
View details for DOI 10.1109/LPT.2007.903878
View details for Web of Science ID 000250212600078
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Polarization controller for hollow-core fiber
OPTICS LETTERS
2007; 32 (11): 1524-1526
Abstract
We demonstrate a universal polarization controller for hollow-core fibers, a simple device consisting of three twisted fiber sections that makes use of the inherent birefringence of the air-core fiber. The device 5% bandwidth at 1550 nm is calculated from measured data to be approximately 13 nm.
View details for Web of Science ID 000247756600060
View details for PubMedID 17546176
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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
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Determination of the mode reflection coefficient in air-core photonic bandgap fibers
OPTICS EXPRESS
2007; 15 (9): 5342-5359
Abstract
Using an eigenmode decomposition technique, we numerically determine the backreflection coefficient of the modes of air-core photonic bandgap fibers for flat terminations. This coefficient is found to be very small for the fundamental air-guided mode, of the order of 10(-5) to 10(-6), in contrast with the surface and bulk modes, which exhibit significantly higher reflections, by about three to four orders of magnitude. For the Crystal Fibre HC-1550-2 fiber, we find a reflection coefficient of 1.9x10(-6) for an air termination, and approximately 3.3% for a silica termination. We also find that the Fresnel approximation is ill suited for the determination of the modal reflection coefficient, and instead propose a more accurate new formula based on an averaged modal index.
View details for Web of Science ID 000246395000009
View details for PubMedID 19532788
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Observation of mode coupling in bitapered air-core photonic bandgap fibers
OPTICS COMMUNICATIONS
2007; 271 (2): 391-395
View details for DOI 10.1016/j.optcom.2006.10.039
View details for Web of Science ID 000244488900014
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Reduced thermal sensitivity of a fiber-optic gyroscope using an air-core photonic-bandgap fiber
JOURNAL OF LIGHTWAVE TECHNOLOGY
2007; 25 (3): 861-865
View details for DOI 10.1109/JLT.2006.889658
View details for Web of Science ID 000245831900027
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Quasi-phase-matched grating characterization using minimum-phase functions
OPTICS COMMUNICATIONS
2007; 269 (1): 199-205
View details for DOI 10.1016/j.optcom.2006.07.047
View details for Web of Science ID 000242671000030
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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
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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
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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
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Silicon-nanocrystal-coated silica microsphere thermooptical switch
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
2006; 12 (6): 1476-1479
View details for DOI 10.1109/JSTQE.2006.885389
View details for Web of Science ID 000243013700020
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Air-core photonic-bandgap fiber-optic gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (8): 3169-3174
View details for DOI 10.1109/JLT.2006.880689
View details for Web of Science ID 000239889600024
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Pickup suppression in Sagnac-based fiber-optic acoustic sensor array
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (7): 2889-2897
View details for DOI 10.1109/JLT.2006.875954
View details for Web of Science ID 000238897200041
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Modeling and measurement of the acoustic lead sensitivity in Sagnac fiber sensor arrays
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (7): 2877-2888
View details for DOI 10.1109/JLT.2006.875955
View details for Web of Science ID 000238897200040
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Minimum-phase-function-based processing in frequency-domain optical coherence tomography systems
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
2006; 23 (7): 1669-1677
Abstract
We present a simple processing technique that uses the concept of minimum-phase functions to improve frequency-domain optical coherence tomography systems. Our approach removes the autocorrelation noise and therefore increases both the accessible depth range and the recovery accuracy. To our knowledge, this is the first time that the concept of minimum-phase functions has been applied to improve optical coherence tomography.
View details for Web of Science ID 000238626900015
View details for PubMedID 16783430
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Bending-induced birefringence of optical fiber cladding modes
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (6): 2336-2339
View details for DOI 10.1109/JLT.2006.874566
View details for Web of Science ID 000238367600009
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A fast and accurate numerical tool to model the modal properties of photonic-bandgap fibers
OPTICS EXPRESS
2006; 14 (7): 2979-2993
Abstract
We describe a finite-difference numerical method that allows us to simulate the modes of air-core photonic-bandgap fibers (PBF) of any geometry in minutes on a standard PC. The modes' effective indices and fields are found by solving a vectorial transverse magnetic-field equation in a matrix form, which can be done quickly because this matrix is sparse and because we reduce its bandwidth by rearranging its elements. The Stanford Photonic-Bandgap Fiber code, which is based on this method, takes about 4 minutes to model 20 modes of a typical PBF on a PC. Other advantages include easy coding, faithful modeling of the abrupt discontinuities in the index profile, high accuracy, and applicability to waveguides of arbitrarily complex profile.
View details for Web of Science ID 000236552800053
View details for PubMedID 19516437
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A new iterative technique to characterize and design transmission fiber Bragg gratings
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (4): 1913-1921
View details for DOI 10.1109/JLT.2006.871112
View details for Web of Science ID 000236815200032
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Characterization of fiber Bragg gratings using spectral interferometry based on minimum-phase functions
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (4): 1739-1757
View details for DOI 10.1109/JLT.2006.871111
View details for Web of Science ID 000236815200014
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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
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Origin of apparent resonance mode splitting in bent long-period fiber gratings
JOURNAL OF LIGHTWAVE TECHNOLOGY
2006; 24 (2): 1027-1034
View details for DOI 10.1109/JLT.2005.862430
View details for Web of Science ID 000235297600048
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A polarization controller for air-core photonic-bandgap fiber
Conference on Optical Fiber Communications/National Fiber Optic Engineers Conference
OPTICAL SOC AMERICA. 2006: 681–683
View details for Web of Science ID 000259602600200
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Measurement of the nonlinear coefficient profile of quasi-phase-matched gratings using iterative error-reduction algorithms
Conference on Nonlinear Frequency Generation and Conversion - Materials, Devices and Applications V
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.647266
View details for Web of Science ID 000237155500014
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Transmission properties of tapered air-core photonic bandgap fibers
Conference on Active and Passive Optical Components for Communication VI
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.685420
View details for Web of Science ID 000242037000026
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Frequency-domain optical coherence tomography based on minimum-phase functions
Conference on Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.648276
View details for Web of Science ID 000237132000026
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Characterization of fiber Bragg gratings using spectral interferometry based on minimum-phase functions
Conference on Optical Components and Materials III
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.647248
View details for Web of Science ID 000237161900005
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Silicon-nanocrystal-coated silica microsphere then-nooptical switch
Conference on Silicon Photonics
SPIE-INT SOC OPTICAL ENGINEERING. 2006
View details for DOI 10.1117/12.669392
View details for Web of Science ID 000237274900023
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Understanding air-core photonic-bandgap fibers: Analogy to conventional fibers
JOURNAL OF LIGHTWAVE TECHNOLOGY
2005; 23 (12): 4169-4177
View details for DOI 10.1109/JLT.2005.859406
View details for Web of Science ID 000234417100022
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Phase sensitivity to temperature of the fundamental mode in air-guiding photonic-bandgap fibers
OPTICS EXPRESS
2005; 13 (18): 6669-6684
Abstract
Because in an air-core photonic-bandgap fiber the fundamental mode travels mostly in air, as opposed to silica in a conventional fiber, the phase of this mode is expected to have a much lower dependence on temperature than in a conventional fiber. We confirm with interferometric measurements in air-core fibers from two manufacturers that their thermal phase sensitivity is indeed ~3 to ~6 times smaller than in an SMF28 fiber, in agreement with an advanced theoretical model. With straightforward fiber design changes (thinner jacket and thicker outer cladding), this sensitivity could be further reduced down to ~11 times that of a standard fiber. This feature is anticipated to have important benefits in fiber optic systems and sensors, especially in the fiber optic gyroscope where it translates into a lower Shupe effect and thus a greater long-term stability.
View details for Web of Science ID 000231719600001
View details for PubMedID 19498684
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Fiber-optic gyroscope using an air-core photonic-bandgap fiber
17th International Conference on Optical Fibre Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2005: 198–201
View details for DOI 10.1117/12.623788
View details for Web of Science ID 000231443000047
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Excitation of non-degenerate resonances through breaking of mirror symmetry in photonic crystal slabs
Conference on Lasers and Electro-Optics (CLEO)
OPTICAL SOC AMERICA. 2005: 828–830
View details for Web of Science ID 000234819901019
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Dependence of the induced optical second-order nonlinearity profile of poled silica samples on poling conditions
Conference on Optical Components and Materials II
SPIE-INT SOC OPTICAL ENGINEERING. 2005: 187–197
View details for DOI 10.1117/12.589536
View details for Web of Science ID 000229338300024
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Detailed analysis of inverse Fourier transform techniques to uniquely infer second-order nonlinearity profile of thin films
JOURNAL OF APPLIED PHYSICS
2005; 97 (1)
View details for DOI 10.1063/1.1826216
View details for Web of Science ID 000226700300010
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Thermally poled germanosilicate films with high secondorder nonlinearity
Conference on Lasers and Electro-Optics (CLEO)
OPTICAL SOC AMERICA. 2005: 2097–2099
View details for Web of Science ID 000234819902184
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SIMBA: A new technique for ultrashort pulse characterization
Digest of the LEOS Summer Topical Meeting
IEEE. 2005: 215–216
View details for Web of Science ID 000231847800106
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Ultra-short pulse characterization using a reference laser pulse
Conference on Laser Resonators and Beam Control VIII
SPIE-INT SOC OPTICAL ENGINEERING. 2005: 140–150
View details for DOI 10.1117/12.589490
View details for Web of Science ID 000229382400015
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Ultrabroadband single-mode long-period fiber gratings using high-order cladding modes
JOURNAL OF APPLIED PHYSICS
2004; 96 (11): 5987-5991
View details for DOI 10.1063/1.1805721
View details for Web of Science ID 000225300800004
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Characterization of thermally poled germanosilicate thin films
OPTICS EXPRESS
2004; 12 (20): 4698-4708
Abstract
We report measurements of the nonlinearity profile of thermally poled low-loss germanosilicate films deposited on fused-silica substrates by PECVD, of interest as potential electro-optic devices. The profiles of films grown and poled under various conditions all exhibit a sharp peak ~0.5 microm beneath the anode surface, followed by a weaker pedestal of approximately constant amplitude down to a depth of 13-16 microm, without the sign reversal typical of poled undoped fused silica. These features suggest that during poling, the films significantly slow down the injection of positive ions into the structure. After local optimization, we demonstrate a record peak nonlinear coefficient of ~1.6 pm/V, approximately twice as strong as the highest reliable value reported in thermally poled fused silica glass, a significant improvement that was qualitatively expected from the presence of Ge.
View details for Web of Science ID 000224253900004
View details for PubMedID 19484021
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Group delay recovery using iterative processing of amplitude of transmission spectra of fibre Bragg gratings
ELECTRONICS LETTERS
2004; 40 (18): 1104-1106
View details for DOI 10.1049/el:20046001
View details for Web of Science ID 000223913300009
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Simulations of the effect of the core ring on surface and air-core modes in photonic bandgap fibers
OPTICS EXPRESS
2004; 12 (15): 3436-3442
Abstract
We show through computer simulations that the thin silica ring that surrounds the air core of a photonic-bandgap fiber introduces surface modes. The intensity profile and dispersion of these modes indicate that they are the modes of the waveguide formed by the ring surrounded by air on one side and the photonic crystal cladding on the other. The ring also induces small perturbations of the fundamental core mode. Coupling to those surface modes, which have propagation constants close to that of the core mode, are likely to induce substantial loss to the core mode. By reducing the thickness of the ring and/or by suitably selecting its radius the propagation constants of the surface modes can be moved farther from that of the core mode and the loss reduced.
View details for Web of Science ID 000222908900016
View details for PubMedID 19483869
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Iterative processing of second-order optical nonlinearity depth profiles
OPTICS EXPRESS
2004; 12 (15): 3367-3376
Abstract
We show through numerical simulations and experimental data that a fast and simple iterative loop known as the Fienup algorithm can be used to process the measured Maker-fringe curve of a nonlinear sample to retrieve the sample's nonlinearity profile. This algorithm is extremely accurate for any profile that exhibits one or two dominant peaks, which covers a wide range of practical profiles, including any nonlinear film of crystalline or organic material (rectangular profiles) and poled silica, for which an excellent experimental demonstration is provided. This algorithm can also be applied to improve the accuracy of the nonlinearity profile obtained by an inverse Fourier transform technique.
View details for Web of Science ID 000222908900008
View details for PubMedID 19483861
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Simple geometric criterion to predict the existence of surface modes in air-core photonic-bandgap fibers
OPTICS EXPRESS
2004; 12 (9): 1864-1872
Abstract
We propose a simple geometric criterion based on the size of the core relative to the photonic crystal to quickly determine whether an air-core photonic-bandgap fiber with a given geometry supports surface modes. Comparison to computer simulations show that when applied to fibers with a triangular-pattern cladding and a circular air core, this criterion accurately predicts the existence of a finite number of discrete ranges of core radii that support no surface modes. This valuable tool obviates the need for time-consuming and costly simulations, and it can be easily applied to fibers with an arbitrary photonic-crystal structure and core profile.
View details for Web of Science ID 000221423300011
View details for PubMedID 19475017
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Designing air-core photonic-bandgap fibers free of surface modes
IEEE JOURNAL OF QUANTUM ELECTRONICS
2004; 40 (5): 551-556
View details for DOI 10.1109/JQE.2004.826429
View details for Web of Science ID 000221090900015
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Simplified inverse Fourier transform technique to measure optical nonlinearity profiles using reference sample
ELECTRONICS LETTERS
2004; 40 (9): 551-552
View details for DOI 10.1049/el:20040361
View details for Web of Science ID 000221476700022
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Improved technique to determine second-order optical nonlinearity profiles using two different samples
APPLIED PHYSICS LETTERS
2004; 84 (5): 681-683
View details for DOI 10.1063/1.1644622
View details for Web of Science ID 000188497800013
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Ceramic lasers: Ready for action
PHOTONICS SPECTRA
2004; 38 (2): 50-?
View details for Web of Science ID 000189170600025
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Acoustic fiber sensor arrays
2nd European Workshop on Optical Fibre Sensors
SPIE-INT SOC OPTICAL ENGINEERING. 2004: 39–50
View details for DOI 10.1117/12.566514
View details for Web of Science ID 000222663500006
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Comparison of three inverse Fourier transform techniques to determine the second-order optical nonlinearity profile of thin films
Conference Optics and Photonic Integrated Circuits
SPIE-INT SOC OPTICAL ENGINEERING. 2004: 304–310
View details for DOI 10.1117/12.548048
View details for Web of Science ID 000223995500036
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Cylinder-assisted Maker-fringe technique to probe second-order optical nonlinearity profiles
Conference on Optical Components and Materials
SPIE-INT SOC OPTICAL ENGINEERING. 2004: 109–114
View details for DOI 10.1117/12.532114
View details for Web of Science ID 000222591800013
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Demonstration of a folded Sagnac sensor array immune to polarization-induced signal fading
APPLIED OPTICS
2003; 42 (36): 7132-7136
Abstract
We demonstrate a new folded Sagnac sensor array design that combines a Faraday rotator mirror and a polarization beam splitter to eliminate the optical noise pulses otherwise generated in a folded Sagnac sensor array. A depolarization scheme compatible with this configuration is also proposed and demonstrated experimentally. It is shown that this new configuration passively eliminates polarization-induced signal fading on every sensor in the array. The minimum detectable phase was measured to be approximately 1.1 microrad/square root of Hz, in agreement with theory.
View details for Web of Science ID 000187463300005
View details for PubMedID 14717288
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Cylinder-assisted maker-fringe technique
ELECTRONICS LETTERS
2003; 39 (25): 1834-1836
View details for DOI 10.1049/el:20031159
View details for Web of Science ID 000187990500043
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Er-doped superfluorescent fiber source with a +/- 0.5-ppm long-term mean-wavelength stability
JOURNAL OF LIGHTWAVE TECHNOLOGY
2003; 21 (12): 3427-3433
View details for DOI 10.1109/JLT.2003.822539
View details for Web of Science ID 000188851300056
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Inverse Fourier transform technique to determine second-order optical nonlinearity spatial profiles (vol 82, pg 1362, 2003)
APPLIED PHYSICS LETTERS
2003; 83 (8): 1679-1679
View details for DOI 10.1063/1.1606887
View details for Web of Science ID 000184844100064
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Inverse Fourier transform technique to determine second-order optical nonlinearity spatial profiles
APPLIED PHYSICS LETTERS
2003; 82 (9): 1362-1364
View details for DOI 10.1063/1.1557789
View details for Web of Science ID 000181201800014
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Fundamental limitations of the McCumber relation applied to Er-doped silica and other amorphous-host lasers
IEEE JOURNAL OF QUANTUM ELECTRONICS
2002; 38 (12): 1629-1637
View details for DOI 10.1109/JQE.2002.805111
View details for Web of Science ID 000179647000010
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Polarization-independent mechanically induced long-period fiber gratings
Conference on Optical Devices for Fiber Communication III
SPIE-INT SOC OPTICAL ENGINEERING. 2002: 72–76
View details for Web of Science ID 000176733700009
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Passive WDM channel power equalization with cascaded nonlinear amplifying loop mirrors
Conference on Optical Devices for Fiber Communication III
SPIE-INT SOC OPTICAL ENGINEERING. 2002: 52–57
View details for Web of Science ID 000176733700006
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Feature section on fiber lasers and amplifiers
IEEE JOURNAL OF QUANTUM ELECTRONICS
2001; 37 (9): 1109-1109
View details for Web of Science ID 000170752900001
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Measurement of the dc Kerr and electrostrictive phase modulation in silica
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
2001; 18 (2): 187-194
View details for Web of Science ID 000166838400008
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Measurement of the electrostrictive constants of silica and their impact on poled silica devices
Conference on Optical Devices for Fiber Communication II
SPIE-INT SOCIETY OPTICAL ENGINEERING. 2001: 119–128
View details for Web of Science ID 000168951200015
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A depolarized Er-doped superfluorescent fiber source with improved long-term polarization stability
IEEE PHOTONICS TECHNOLOGY LETTERS
2001; 13 (1): 25-27
View details for Web of Science ID 000167071000009
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A polarization-based folded Sagnac fiber-optic sensor array for acoustic waves
Conference on Fiber Optic Sensor Technology and Applications
SPIE-INT SOC OPTICAL ENGINEERING. 2001: 336–345
View details for Web of Science ID 000175474600036
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A polarization-stable Er-doped superfluorescent fiber source including a Faraday rotator mirror
IEEE PHOTONICS TECHNOLOGY LETTERS
2000; 12 (11): 1465-1467
View details for Web of Science ID 000165684100011
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A folded configuration of a fiber Sagnac-based sensor array
OPTICAL FIBER TECHNOLOGY
2000; 6 (4): 388-399
View details for Web of Science ID 000090056800005
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Tunable mechanically induced long-period fiber gratings
OPTICS LETTERS
2000; 25 (10): 710-712
Abstract
We report the experimental characterization of mechanically induced long-period fiber gratings (LPFG's) made by pressing a plate with periodic grooves against a short length of fiber. This filter, which is simple and inexpensive, exhibits transmission spectra and temperature stability similar to those of photoinduced LPFG's. It also offers the unique advantages of being tunable, erasable, and reconfigurable. Its polarization dependence also makes it useful as a polarizer, although it can also be eliminated with simple mechanical designs.
View details for Web of Science ID 000086991900010
View details for PubMedID 18064159
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Improved nonlinear coefficient (0.7 pm/V) in silica thermally poled at high voltage and temperature
ELECTRONICS LETTERS
2000; 36 (6): 555-556
View details for Web of Science ID 000086381000050
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Measurements of thermal effects in fibers doped with cobalt and vanadium
JOURNAL OF LIGHTWAVE TECHNOLOGY
2000; 18 (2): 161-165
View details for Web of Science ID 000085505500004
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A novel fiber-optic sensor array based on the Sagnac interferometer
JOURNAL OF LIGHTWAVE TECHNOLOGY
1999; 17 (11): 2316-2326
View details for Web of Science ID 000083675100050
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Nanosecond thermal fiber switch using a Sagnac interferometer
IEEE PHOTONICS TECHNOLOGY LETTERS
1999; 11 (10): 1256-1258
View details for Web of Science ID 000082645800018
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Improved polarization stability of the output mean wavelength in an Er-doped superfluorescent fiber source incorporating a Faraday rotator mirror
Conference on Optical Devices for Fiber Communication
SPIE-INT SOC OPTICAL ENGINEERING. 1999: 10–15
View details for Web of Science ID 000084757300002
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Demonstration of a folded configuration of a fiber Sagnac-based sensor array
SPIE Conference on Fiber Optic Sensor Technology and Applications
SPIE-INT SOC OPTICAL ENGINEERING. 1999: 538–542
View details for Web of Science ID 000084810900062
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A novel fiber optic sensor array based on the Sagnac interferometer
SPIE Conference on Fiber Optic Sensor Technology and Applications
SPIE-INT SOC OPTICAL ENGINEERING. 1999: 276–284
View details for Web of Science ID 000084810900030
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Polarized superfluorescent fiber sources
OPTICAL FIBER TECHNOLOGY
1998; 4 (4): 453-470
View details for Web of Science ID 000076832800005
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Phase-sensitivity measurement of a 10-sensor array with erbium-doped fiber amplifier telemetry
OPTICS LETTERS
1998; 23 (16): 1313-1315
Abstract
We report what are believed to be the first measurements of the phase sensitivity of a fiber sensor array using multiple low-gain remotely pumped amplifiers with an interferometric sensor inserted. The measured phase sensitivities for individual rungs average 5.7 microrad(rms)/ radicalHz and exhibit no dependence on rung number, in agreement with predictions.
View details for Web of Science ID 000075428300023
View details for PubMedID 18087509
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Large-scale interferometric fiber sensor arrays incorporating multiple optical switches
OPTICAL FIBER TECHNOLOGY
1998; 4 (3): 316-327
View details for Web of Science ID 000074877500007
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Thermal effects in doped fibers
JOURNAL OF LIGHTWAVE TECHNOLOGY
1998; 16 (6): 1013-1023
View details for Web of Science ID 000074004400007
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Experimental and theoretical analysis of the resonant nonlinearity in ytterbium-doped fiber
JOURNAL OF LIGHTWAVE TECHNOLOGY
1998; 16 (5): 798-806
View details for Web of Science ID 000073365900008
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Absolute measurement of the second-order nonlinearity profile in poled silica
OPTICS LETTERS
1998; 23 (8): 588-590
Abstract
Measurement of the thin nonlinearity profile of poled silica by the Maker fringe technique has been impossible because of total internal reflection (TIR) at the back surface of the sample. We demonstrate that this limitation can be removed by placing a prism against each face of the sample, thus avoiding TIR. This novel technique allows, for the first time to our knowledge, the nonlinearity profile of a thin film to be inferred by the Maker fringe technique. Applied to a silica sample thermally poled under standard conditions (275 degrees C and 5.3 kV for 30 min), it suggests a Gaussian profile with a 1/e width of 8 mum and a maximum d(33) of 0.34 pm/V.
View details for Web of Science ID 000073055500008
View details for PubMedID 18084585
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Optimization of large-scale fiber sensor arrays incorporating multiple optical amplifiers - Part II: Pump power
JOURNAL OF LIGHTWAVE TECHNOLOGY
1998; 16 (2): 224-231
View details for Web of Science ID 000071888800008
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A mueller matrix formalism for modeling polarization effects in erbium-doped fiber
JOURNAL OF LIGHTWAVE TECHNOLOGY
1998; 16 (2): 200-206
View details for Web of Science ID 000071888800004
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Optimization of large-scale fiber sensor arrays incorporating multiple optical amplifiers - Part I: Signal-to-noise ratio
JOURNAL OF LIGHTWAVE TECHNOLOGY
1998; 16 (2): 218-223
View details for Web of Science ID 000071888800007
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DC Kerr coefficient in silica: theory and experiment
Conference on Doped Fiber Devices II
SPIE - INT SOC OPTICAL ENGINEERING. 1998: 102–107
View details for Web of Science ID 000078691400014
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Polarization dependence of the mean wavelength of Er-doped superfluorescent fiber sources
Conference on Doped Fiber Devices II
SPIE - INT SOC OPTICAL ENGINEERING. 1998: 26–29
View details for Web of Science ID 000078691400004
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Advances in the measurement of the poled silica nonlinear profile
Conference on Doped Fiber Devices II
SPIE - INT SOC OPTICAL ENGINEERING. 1998: 115–119
View details for Web of Science ID 000078691400016
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Large-scale interferometric fiber sensor arrays with multiple optical amplifiers
OPTICS LETTERS
1997; 22 (21): 1651-1653
Abstract
We report what we believe to be the first laboratory prototype of a fiber sensor array using multiple low-gain (5dB) remotely pumped amplifiers in a 10-rung ladder structure. Incorporating amplifiers improves the system noise figure to less than 20dB, compared with 32dB in an optimized passive array of the same size. Scalability to more than 300sensors per fiber pair while a high dynamic range (1microrad/ sensitivity) is maintained is demonstrated.
View details for Web of Science ID A1997YE15500024
View details for PubMedID 18188326
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Novel fiber sensor arrays using erbium-doped fiber amplifiers
JOURNAL OF LIGHTWAVE TECHNOLOGY
1997; 15 (9): 1681-1688
View details for Web of Science ID A1997XV75100008
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A high-stability fiber amplifier source for the fiber optic gyroscope
JOURNAL OF LIGHTWAVE TECHNOLOGY
1997; 15 (9): 1689-1694
View details for Web of Science ID A1997XV75100009
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Polarized superfluorescent fiber source
OPTICS LETTERS
1997; 22 (3): 160-162
Abstract
We report the demonstration of a polarized superfluorescent fiber source (SFS) that increases the power output in the desired linearly polarized component by a factor of 1.76 over that of a standard, unpolarized SFS that uses the same pump power. This increase in efficiency is accomplished by insertion of a low-loss polarizer at an optimum point in the erbium-doped fiber of a standard SFS.
View details for Web of Science ID A1997WE37600008
View details for PubMedID 18183135
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Experimental evidence for strong UV transition contribution in the resonant nonlinearity of doped fibers
JOURNAL OF LIGHTWAVE TECHNOLOGY
1997; 15 (2): 299-303
View details for Web of Science ID A1997WH67600016
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Resonantly enhanced nonlinearity in doped fibers for low-power all-optical switching: A review
OPTICAL FIBER TECHNOLOGY
1997; 3 (1): 44-64
View details for Web of Science ID A1997XP55600006
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Basis for a polarized superfluorescent fiber source with increased efficiency
OPTICS LETTERS
1996; 21 (23): 1900-1902
Abstract
We propose to produce a superfluorescent fiber source (SFS) with a linearly polarized output by inserting a discrete polarizer near the middle of a polarization-maintaining Er-doped fiber. We show that with a relatively low-loss polarizer (<0.5 dB) the output power of the polarized SFS is predicted to approach that of a standard, unpolarized SFS, i.e., the power of the desired polarization mode is nearly doubled. The efficiency of this source depends weakly on the polarizer location and extinction ratio, although it depends strongly on its insertion loss.
View details for Web of Science ID A1996VV69000010
View details for PubMedID 19881839
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Switching power reduction using a pumped nonlinear directional coupler
IEEE PHOTONICS TECHNOLOGY LETTERS
1996; 8 (10): 1328-1330
View details for Web of Science ID A1996VH22700016
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All-optical switching using color centers in an irradiated phosphorus-doped fiber
IEEE PHOTONICS TECHNOLOGY LETTERS
1996; 8 (7): 897-899
View details for Web of Science ID A1996UT30000017
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Parametric analysis of semiconductor-doped classes for all-optical switching
JOURNAL OF LIGHTWAVE TECHNOLOGY
1996; 14 (4): 601-610
View details for Web of Science ID A1996UE70000010
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Highly efficient polarized Er-doped superfluorescent fiber source
Conference on Doped Fiber Devices
SPIE-INT SOC OPTICAL ENGINEERING. 1996: 35–41
View details for Web of Science ID A1996BG81Z00005
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Contribution of UV transitions to the strong third-order nonlinearity of doped fibers
Conference on Doped Fiber Devices
SPIE-INT SOC OPTICAL ENGINEERING. 1996: 183–188
View details for Web of Science ID A1996BG81Z00019
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Kramers-Kronig analysis of the absorption change in fiber gratings
Conference on Doped Fiber Devices
SPIE-INT SOC OPTICAL ENGINEERING. 1996: 109–120
View details for Web of Science ID A1996BG81Z00012
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A DC Kerr measurement in a silica channel waveguide
Conference on Doped Fiber Devices
SPIE-INT SOC OPTICAL ENGINEERING. 1996: 209–218
View details for Web of Science ID A1996BG81Z00022
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CHARACTERIZATION OF CLUSTERS IN RARE-EARTH-DOPED FIBERS BY TRANSMISSION MEASUREMENTS
JOURNAL OF LIGHTWAVE TECHNOLOGY
1995; 13 (2): 120-126
View details for Web of Science ID A1995QH36100003
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ELECTROOPTIC PHASE MODULATION IN A SILICA CHANNEL WAVE-GUIDE
OPTICS LETTERS
1994; 19 (7): 466-468
Abstract
We report what is to our knowledge the first demonstration of electro-optic phase modulation in a fused-silica channel waveguide. The nonlinearity is induced through elevated temperature poling of an electron-beamirradiated waveguide. A phase shift of 32 mrad was measured at lambda = 633 nm for a device interaction length of 4.8 mm and an applied electric field of 7.3 V/microm.
View details for Web of Science ID A1994NC78800014
View details for PubMedID 19844342
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MODELING OF ION-PAIRS IN ERBIUM-DOPED FIBER AMPLIFIERS
OPTICS LETTERS
1994; 19 (5): 347-349
Abstract
The effects of Er-Er pairs on the characteristics of Er-doped fiber amplifiers are analyzed theoretically. Pairs are found to have little effect on the amplifier optimum length, signal saturation power, and noise figure (at constant gain) but to cause significant reduction in the gain, even at residual levels, quantitatively consistent with fiber laser measurements. A maximum tolerable fraction of paired ions near 8%, corresponding to approximately 400 mole parts in 10(6) Er(2)O(3), is predicted for near-optimum gain efficiency in Al-Ge silica fibers.
View details for Web of Science ID A1994MY67400013
View details for PubMedID 19829638
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A MODEL OF NONLINEAR ALL-OPTICAL SWITCHING IN DOPED FIBERS
JOURNAL OF LIGHTWAVE TECHNOLOGY
1994; 12 (1): 149-156
View details for Web of Science ID A1994MX06500021
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STATUS OF BROAD-BAND RARE-EARTH-DOPED FIBER SOURCES FOR FOG APPLICATIONS
Conference on Fiber Optic and Laser Sensors XI
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 113–131
View details for Web of Science ID A1994BA45K00013
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EFFECTS OF ER3+ PAIRS ON THE GAIN AND NOISE-FIGURE OF EDFAS
Conference on Fiber Laser Sources and Amplifiers V
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 86–91
View details for Web of Science ID A1994BA10K00009
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CHARACTERIZATION OF THE 2ND-ORDER NONLINEARITY IN POLED FUSED-SILICA
Conference on Doped Fiber Devices and Systems
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 194–206
View details for Web of Science ID A1994BB55D00022
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EFFECT OF COMPOSITION ON CLUSTERING IN ER-DOPED FIBER LASERS
Conference on Fiber Laser Sources and Amplifiers V
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 14–19
View details for Web of Science ID A1994BA10K00002
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ALL-OPTICAL SWITCHING USING COLOR-CENTERS IN IRRADIATED SILICA FIBERS
Conference on Doped Fiber Devices and Systems
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 110–116
View details for Web of Science ID A1994BB55D00012
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MEASUREMENTS AND MODELING OF THE OUTPUT POLARIZATION OF ER-DOPED FIBER LASERS
Conference on Doped Fiber Devices and Systems
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 24–40
View details for Web of Science ID A1994BB55D00004
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SUB-MICROSECOND ALL-OPTICAL SWITCHING IN NEODYMIUM-DOPED FIBER
Conference on Fiber Laser Sources and Amplifiers V
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 166–171
View details for Web of Science ID A1994BA10K00017
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NOVEL TECHNIQUES TO CHARACTERIZE CLUSTERING IN ND-DOPED FIBERS
Conference on Fiber Laser Sources and Amplifiers V
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 50–64
View details for Web of Science ID A1994BA10K00006
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POWER AND LENGTH REQUIREMENTS FOR ALL-OPTICAL SWITCHING IN SEMICONDUCTOR-DOPED GLASS WAVE-GUIDES
Conference on Doped Fiber Devices and Systems
SPIE - INT SOC OPTICAL ENGINEERING. 1994: 125–133
View details for Web of Science ID A1994BB55D00014
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EFFECTS OF CONCENTRATION AND CLUSTERS IN ERBIUM-DOPED FIBER LASERS
OPTICS LETTERS
1993; 18 (23): 2014-2016
View details for Web of Science ID A1993MJ09900008
View details for PubMedID 19829476
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ANALYSIS OF NONLINEAR-OPTICAL SWITCHING IN AN ERBIUM-DOPED FIBER
JOURNAL OF LIGHTWAVE TECHNOLOGY
1993; 11 (9): 1416-1424
View details for Web of Science ID A1993MG88600002
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MICROSECOND OPTICAL OPTICAL SWITCHING IN A NEODYMIUM-DOPED 2-MODE FIBER
OPTICS LETTERS
1993; 18 (11): 927-929
View details for Web of Science ID A1993LD51700029
View details for PubMedID 19802318
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FABRICATION, CHARACTERIZATION AND INDEX PROFILE MODELING OF HIGH-DAMAGE RESISTANCE ZN-DIFFUSED WAVE-GUIDES IN CONGRUENT AND MGO - LITHIUM-NIOBATE
JOURNAL OF LIGHTWAVE TECHNOLOGY
1992; 10 (9): 1238-1246
View details for Web of Science ID A1992JQ25200010
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LASER-DIODE-PUMPED NONLINEAR SWITCH IN ERBIUM-DOPED FIBER
OPTICS LETTERS
1992; 17 (14): 1026-1028
View details for Web of Science ID A1992JD25200021
View details for PubMedID 19794709
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PHOTOREFRACTIVE-DAMAGE-RESISTANT ZN-DIFFUSED WAVE-GUIDES IN MGO-LINBO3
OPTICS LETTERS
1991; 16 (13): 995-997
Abstract
Planar waveguides were fabricated by diffusing Zn into MgO:LiNbO(3) and LiNbO(3). Zn-diffused waveguides in MgO:LiNbO(3) guide both the ordinary and extraordinary polarization and have propagation losses at 633 nm in the range of 0.4-1.2 dB/cm. Single-beam-induced in-plane scattering due to photorefractive damage was not observed at 515 nm up to intensities of as much as 90 kW/cm(2).
View details for Web of Science ID A1991FU16000007
View details for PubMedID 19776854
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WAVELENGTH STABILITY OF A HIGH-OUTPUT, BROAD-BAND, ER-DOPED SUPERFLUORESCENT FIBER SOURCE PUMPED NEAR 980-NM
OPTICS LETTERS
1991; 16 (12): 961-963
Abstract
We report the dependence of the mean wavelength of Er-doped superfluorescent fiber sources on temperature, pump wavelength, and pump power. In particular, we measure an intrinsic temperature coefficient of between -2 and +8 parts in 10(6) (ppm) per degree Celsius depending on pump wavelength, pump power, and fiber length. Additionally, we report a pump wavelength dependence that is symmetrical about the peak pump absorption wavelength (near 976 nm) and a decrease in mean wavelength with pump power with a slope of between 0 and -93 ppm/mW.
View details for Web of Science ID A1991FQ93900027
View details for PubMedID 19776843
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STABLE FIBER-SOURCE GYROSCOPES
OPTICS LETTERS
1990; 15 (22): 1321-1323
Abstract
We describe two new configurations of fiber gyroscopes that use superfluorescent fiber laser sources. In the first configuration we introduce a backward-pumping technique that achieves an order-of-magnitude increase in the power that can be launched into the gyroscope without instabilities. In the second configuration we employ the optical gain of the superfluorescent fiber laser source to amplify the signal returned from the gyroscope, obtaining an additional three-orders-of-magnitude increase in the optical power incident upon the detector, with an implication for simplification of the electronics. In both configurations, source beat-noise-limited rotation sensitivity is achieved.
View details for Web of Science ID A1990EJ40800023
View details for PubMedID 19771079
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CLOSED-FORM EXPRESSIONS FOR THE GAIN IN 3-LEVEL AND 4-LEVEL LASER FIBERS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (10): 1788-1796
View details for Web of Science ID A1990EN85600014
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NONINVASIVE SWITCHABLE ACOUSTOOPTIC TAPS FOR OPTICAL FIBER
OPTICAL FIBER COMMUNICATIONS CONF ( OFC 90 )
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 1990: 1304–12
View details for Web of Science ID A1990DU74200010
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BROAD-SPECTRUM, WAVELENGTH-SWEPT, ERBIUM-DOPED FIBER LASER AT 1.55-MU-M
OPTICS LETTERS
1990; 15 (16): 879-881
Abstract
We describe an argon-ion-laser-pumped erbium-doped fiber laser at 1.55 microm that incorporates low-rate frequency modulation of an intracavity acousto-optic modulator to provide repeated, continuous tuning of the output spectrum. The spectral width of this wavelength-swept fiber laser is as large as 20 nm with 9 mW of output power, even though erbium in silica has a mostly homogeneously broadened gain. The time-averaged visibility curve for a 14-nm-wide source indicates a short (160-microm) coherence length, which is of interest for fiber-optic gyroscopes that operate with long integration times and short-coherence-length sources.
View details for Web of Science ID A1990DW76800001
View details for PubMedID 19770940
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SPECTRUM STABILITY OF A BROAD-BAND 1060 NM ND-DOPED FIBER LASER
ELECTRONICS LETTERS
1990; 26 (13): 870-872
View details for Web of Science ID A1990DM82200027
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CHARACTERIZATION AND OPTIMIZATION OF THE GAIN IN ND-DOPED SINGLE-MODE FIBERS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1990; 26 (6): 1105-1110
View details for Web of Science ID A1990DZ86600018
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SPECTRAL CHARACTERISTICS OF HIGH-POWER 1.5 MU-M BROAD-BAND SUPERLUMINESCENT FIBER SOURCES
IEEE PHOTONICS TECHNOLOGY LETTERS
1990; 2 (3): 178-180
View details for Web of Science ID A1990CU22400010
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ELECTRONICALLY TUNABLE, 1.55-MUM ERBIUM-DOPED FIBER LASER
OPTICS LETTERS
1990; 15 (5): 273-275
Abstract
An erbium-doped, silica-based fiber laser was electronically tuned over two ranges from 1529.6 to 1533.3 nm and from 1543.8 to 1563.0 nm with more than 13 mW of maximum power. The tuning element was an intracavity acousto-optic modulator (Bragg cell) configured to feed back the first-order, frequency-shifted deflected beam. The maximum optical/acoustic tuning coefficient was -15 nm/MHz.
View details for Web of Science ID A1990CR02800008
View details for PubMedID 19759780
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ANALYSIS OF A 1060-NM ND-SIO2 SUPERFLUORESCENT FIBER LASER
JOURNAL OF LIGHTWAVE TECHNOLOGY
1989; 7 (7): 1009-1015
View details for Web of Science ID A1989AC09800001
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BROAD-BAND DIODE-PUMPED FIBER LASER
ELECTRONICS LETTERS
1988; 24 (14): 838-840
View details for Web of Science ID A1988P309900008
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SINGLE-MODE FIBRE-OPTIC COMPONENTS
JOURNAL OF THE INSTITUTION OF ELECTRONIC AND RADIO ENGINEERS
1988; 58 (5): S66-S78
View details for Web of Science ID A1988Q658000002
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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
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PULSE CHARACTERISTICS OF Q-SWITCHED FIBER LASERS
JOURNAL OF LIGHTWAVE TECHNOLOGY
1987; 5 (12): 1645-1651
View details for Web of Science ID A1987L502500001
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10MW SUPERFLUORESCENT SINGLE-MODE FIBER SOURCE AT 1060-NM
ELECTRONICS LETTERS
1987; 23 (24): 1320-1321
View details for Web of Science ID A1987L101600044
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MINIATURE CW AND ACTIVE INTERNALLY Q-SWITCHED ND-MGO-LINBO3 LASERS
IEEE JOURNAL OF QUANTUM ELECTRONICS
1987; 23 (2): 262-266
View details for Web of Science ID A1987F972100020
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THEORY OF SUPERFLUORESCENT FIBER LASERS
JOURNAL OF LIGHTWAVE TECHNOLOGY
1986; 4 (11): 1631-1639
View details for Web of Science ID A1986E984500005
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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
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THEORY AND IMPLEMENTATION OF A RAMAN ACTIVE FIBER DELAY-LINE
JOURNAL OF LIGHTWAVE TECHNOLOGY
1986; 4 (4): 426-443
View details for Web of Science ID A1986A815500009
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1.064-MU-M AND 1.32-MU-M ND - YAG SINGLE-CRYSTAL FIBER LASERS
JOURNAL OF LIGHTWAVE TECHNOLOGY
1986; 4 (4): 454-460
View details for Web of Science ID A1986A815500012
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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
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RAMAN AMPLIFICATION OF RECIRCULATING PULSES IN A REENTRANT FIBER LOOP
OPTICS LETTERS
1985; 10 (2): 83-85
Abstract
We report the generation of a train of 130 optical pulses derived from a single input pulse recirculating in an active reentrant fiber loop. This was achieved in a 810-m-long single-mode fiber loop closed by a fiber directional coupler. Propagation loss and coupler bifurcation of the 1.12-microm signal were compensated for by Raman amplification using 1.064-microm pump pulses. The effects of pump-power fluctuations on the pulse's amplitude stability and background noise are also reported.
View details for Web of Science ID A1985AAU3100011
View details for PubMedID 19724353
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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
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MEASUREMENT OF THE CORE PROXIMITY IN POLISHED FIBER SUBSTRATES AND COUPLERS
OPTICS LETTERS
1985; 10 (9): 463-465
Abstract
We report recent developments in a technique to measure the thickness of cladding remaining on polished singlemode fiber substrates. This technique relies on the measurement of the throughput attenuation resulting when a drop of liquid of appropriate refractive index is placed on the substrate. Applications to fiber couplers and other all-fiber devices are described.
View details for Web of Science ID A1985APM7300013
View details for PubMedID 19724482
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THEORETICAL-ANALYSIS OF OPTICAL FIBER LASER-AMPLIFIERS AND OSCILLATORS
APPLIED OPTICS
1985; 24 (3): 333-342
View details for Web of Science ID A1985ABG9600009
View details for PubMedID 18216950
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WAVELENGTH MULTIPLEXING IN SINGLE-MODE FIBER COUPLERS
APPLIED OPTICS
1983; 22 (3): 484-491
Abstract
Theoretical and experimental studies of wavelength-division multiplexing in a single-mode fiber optic coupler fabricated by mechanical polishing are reported. The variable spacing geometry of the device allows fine tuning of the center wavelength of operation. Wavelength selectivities ranging from 200 to 35 nm have been experimentally demonstrated, with cross talk ranging from 50 to 10 dB. Selectivity control is simply achieved by proper choice of the interaction length of the coupler. The dependence of the multiplexer behavior on all relevant parameters is investigated and found to satisfy predicted results.
View details for Web of Science ID A1983QA66600030
View details for PubMedID 18195814
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SINGLE-MODE FIBEROPTIC COMPONENTS
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
1982; 326: 137-142
View details for Web of Science ID A1982PN95700021
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ANALYSIS OF A TUNABLE SINGLE-MODE OPTICAL FIBER COUPLER
IEEE JOURNAL OF QUANTUM ELECTRONICS
1982; 18 (4): 746-754
View details for Web of Science ID A1982NN72000037