Bio


Joseph M. Kahn is a Professor of Electrical Engineering at Stanford University. His research addresses communication and imaging through optical fibers, including modulation, detection, signal processing and spatial multiplexing. He received A.B. and Ph.D. degrees in Physics from U.C. Berkeley in 1981 and 1986. From 1987-1990, he was at AT&T Bell Laboratories, Crawford Hill Laboratory, in Holmdel, NJ. He was on the Electrical Engineering faculty at U.C. Berkeley from 1990-2003. In 2000, he co-founded StrataLight Communications, which was acquired by Opnext, Inc. in 2009. He received the National Science Foundation Presidential Young Investigator Award in 1991 and is a Fellow of the IEEE.

Academic Appointments


Administrative Appointments


  • Chair, Academic Affairs Committee, Department of Electrical Engineering (2012 - Present)

Honors & Awards


  • Fellow, IEEE (2000)
  • Presidential Young Investigator, National Science Foundation (1991-1996)
  • Hoover Faculty Scholar, Stanford University (2003-2005)

Professional Education


  • PhD, University of California, Berkeley, Physics (1986)
  • MS, University of California, Berkeley, Physics (1983)
  • BA, University of California, Berkeley, Physics (1981)

Stanford Advisees


All Publications


  • Geometric Shaping for Distortion-Limited Intensity Modulation/Direct Detection Data Center Links IEEE PHOTONICS JOURNAL Liang, E. M., Kahn, J. M. 2023; 15 (6)
  • Optimal Shaping for the Stokes Vector Receiver JOURNAL OF LIGHTWAVE TECHNOLOGY Jia, H., Liang, E., Kahn, J. M. 2023; 41 (22): 6884-6897
  • Design of Mode-Locked Semiconductor Laser Comb-Based Analog Coherent Links JOURNAL OF LIGHTWAVE TECHNOLOGY Chen, E., Coldren, L. A., Kahn, J. M. 2023; 41 (18): 5930-5941
  • Efficient Integrated Multimode Amplifiers for Scalable Long-Haul SDM Transmission JOURNAL OF LIGHTWAVE TECHNOLOGY Srinivas, H., Krutko, O., Kahn, J. M. 2023; 41 (15): 4989-5002
  • Differential Edge Modulation Signaling for Low-Energy, High-Speed Wireline Communication IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS Smith, R. L., Hossain, M., Werner, C. W., Kahn, J. M., Lee, T. H. 2023
  • Effect of Higher-Order Modal Dispersion in Direct-Detection Mode-Division-Multiplexed Links JOURNAL OF LIGHTWAVE TECHNOLOGY Vijay, A., Kahn, J. M. 2023; 41 (6): 1670-1683
  • Impact and Mitigation of Mode-Dependent Gain in Ultra-Long-Haul SDM Systems Mello, D. A., Ospina, R. B., Srinivas, H., Choutagunta, K., Chou, E., Kahn, J. M., IEEE IEEE. 2023
  • Phase Noise Analysis of Resonator-Enhanced Electro-Optic Comb-Based Analog Coherent Receivers JOURNAL OF LIGHTWAVE TECHNOLOGY Chen, E., Buscaino, B., Kahn, J. M. 2022; 40 (21): 7117-7128
  • High-efficiency and broadband on-chip electro-optic frequency comb generators NATURE PHOTONICS Hu, Y., Yu, M., Buscaino, B., Sinclair, N., Zhu, D., Cheng, R., Shams-Ansari, A., Shao, L., Zhang, M., Kahn, J. M., Loncar, M. 2022
  • Successive Interference Cancellation on Frequency-Selective Channels With Mode-Dependent Gain JOURNAL OF LIGHTWAVE TECHNOLOGY Chou, E. S., Kahn, J. M. 2022; 40 (12): 3729-3738
  • Phase Retrieval-Based Coherent Receivers: Signal Design and Degrees of Freedom JOURNAL OF LIGHTWAVE TECHNOLOGY Chou, E. S., Srinivas, H., Kahn, J. M. 2022; 40 (5): 1296-1307
  • Modal Multiplexing and Atmospheric Turbulence Mitigation in Free-Space Optical Communications Kahn, J. M., Belmonte, A., IEEE IEEE. 2022
  • Optimal modes for spatially multiplexed free-space communication in atmospheric turbulence OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2021; 29 (26): 43556-43566

    View details for DOI 10.1364/OE.442797

    View details for Web of Science ID 000730136600098

  • Modeling and Experimental Measurement of Power Efficiency for Power-Limited SDM Submarine Transmission Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Srinivas, H., Downie, J. D., Hurley, J., Liang, X., Himmelreich, J., Perin, J., Mello, D. A., Kahn, J. M. 2021; 39 (8): 2376–86
  • External vs. Integrated Light Sources for Intra-Data Center Co-Packaged Optical Interfaces JOURNAL OF LIGHTWAVE TECHNOLOGY Buscaino, B., Chen, E., Stewart, J. W., Pham, T., Kahn, J. M. 2021; 39 (7): 1984–96
  • Coherent Data Center Links JOURNAL OF LIGHTWAVE TECHNOLOGY Perin, J., Shastri, A., Kahn, J. M. 2021; 39 (3): 730–41
  • Designing High-Performance Multimode Fibers Using Refractive Index Optimization JOURNAL OF LIGHTWAVE TECHNOLOGY Choutagunta, K., Kahn, J. M. 2021; 39 (1): 233–42
  • Experimental Characterization of Power Efficiency for Power-Limited SDM Submarine Transmission Systems Downie, J. D., Hurley, J., Liang, X., Himmelreich, J., Srinivas, H., Perin, J., Mello, D. A., Kahn, J. M., IEEE IEEE. 2021
  • High-efficiency and broadband electro-optic frequency combs using coupled lithium-niobate microresonators Hu, Y., Yu, M., Buscaino, B., Sinclair, N., Zhu, D., Shams-Ansari, A., Shao, L., Zhang, M., Kahn, J. M., Loncar, M., IEEE IEEE. 2021
  • Phase Retrieval-Based Coherent Receivers Chou, E. S., Srinivas, H., Kahn, J. M., IEEE IEEE. 2021
  • Adaptive Coding and Modulation for Robust Optical Access Networks JOURNAL OF LIGHTWAVE TECHNOLOGY Chou, E. S., Kahn, J. M. 2020; 38 (8): 2242–52
  • Effect of atmospheric turbulence on timing instability for partially reciprocal two-way optical time transfer links PHYSICAL REVIEW A Taylor, M. T., Belmonte, A., Hollberg, L., Kahn, J. M. 2020; 101 (3)
  • Design of Efficient Resonator-Enhanced Electro-Optic Frequency Comb Generators JOURNAL OF LIGHTWAVE TECHNOLOGY Buscaino, B., Zhang, M., Loncar, M., Kahn, J. M. 2020; 38 (6): 1400–1413
  • Adapting Mach-Zehnder Mesh Equalizers in Direct-Detection Mode-Division-Multiplexed Links JOURNAL OF LIGHTWAVE TECHNOLOGY Choutagunta, K., Roberts, I., Miller, D. B., Kahn, J. M. 2020; 38 (4): 723–35
  • Impact of Polarization- and Mode-Dependent Gain on the Capacity of Ultra-Long-Haul Systems Mello, D. A., Srinivas, H., Choutagunta, K., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2020: 303–18
  • Impact and Mitigation of Polarization- or Mode-Dependent Gain in Ultra-Long-Haul Systems Srinivas, H., Chou, E. S., Mello, D. A., Choutagunta, K., Kahn, J. M., IEEE IEEE. 2020
  • Data Center Links Beyond 100 Gb/s per Wavelength Kahn, J. M., Perin, J., Shastri, A., IEEE IEEE. 2020
  • Two-Way Time and Frequency Transfer via Ground-to-Satellite Optical Communications Links Taylor, M. T., Kahn, J. M., Hollberg, L., Inst Navigat INST NAVIGATION. 2020: 207–15
  • Multi-Tb/s-per-Fiber Coherent Co-Packaged Optical Interfaces for Data Center Switches JOURNAL OF LIGHTWAVE TECHNOLOGY Buscaino, B., Taylor, B. D., Kahn, J. M. 2019; 37 (13): 3401–12
  • Importance of Amplifier Physics in Maximizing the Capacity of Submarine Links JOURNAL OF LIGHTWAVE TECHNOLOGY Perin, J., Kahn, J. M., Downie, J. D., Hurley, J., Bennett, K. 2019; 37 (9): 2076–85
  • Broadband electro-optic frequency comb generation in a lithium niobate microring resonator NATURE Zhang, M., Buscaino, B., Wang, C., Shams-Ansari, A., Reimer, C., Zhu, R., Kahn, J. M., Loncar, M. 2019; 568 (7752): 373-+
  • Efficient Quantification and Simulation of Modal Dynamics in Multimode Fiber Links JOURNAL OF LIGHTWAVE TECHNOLOGY Choutagunta, K., Roberts, I., Kahn, J. M. 2019; 37 (8): 1813–25
  • Broadband electro-optic frequency comb generation in a lithium niobate microring resonator. Nature Zhang, M., Buscaino, B., Wang, C., Shams-Ansari, A., Reimer, C., Zhu, R., Kahn, J. M., Loncar, M. 2019

    Abstract

    Optical frequency combs consist of equally spaced discrete optical frequency components and are essential tools for optical communication, precision metrology, timing and spectroscopy1-9. At present, combs with wide spectra are usually generated by mode-locked lasers10 or dispersion-engineered resonators with third-order Kerr nonlinearity11. An alternative method of comb production uses electro-optic (EO) phase modulation in a resonator with strong second-order nonlinearity, resulting in combs with excellent stability and controllability12-14. Previous EO combs, however, have been limited to narrow widths by a weak EO interaction strength and a lack of dispersion engineering in free-space systems. Here we overcome these limitations by realizing an integrated EO comb generator in a thin-film lithium niobate photonic platform that features a large EO response, ultralow optical loss and highly co-localized microwave and optical fields15, while enabling dispersion engineering. Our measured EO comb spans more frequencies than the entire telecommunications L-band (over 900 comb lines spaced about 10 gigahertz apart), and we show that future dispersion engineering can enable octave-spanning combs. Furthermore, we demonstrate the high tolerance of our comb generator to modulation frequency detuning, with frequency spacing finely controllable over seven orders of magnitude (10 hertz to 100 megahertz), and we use this feature to generate dual-frequency combs in a single resonator. Our results show that integrated EO comb generators are capable of generating wide and stable comb spectra. Their excellent reconfigurability is a powerful complement to integrated Kerr combs, enabling applications ranging from spectroscopy16 to optical communications8.

    View details for PubMedID 30858615

  • Mode-Multiplexed Transmission Within and Across Mode Groups of a Multimode-Fiber Wittek, S., Ryf, R., Fontaine, N. K., Choutagunta, K., Mazur, M., Chen, H., Alvarado-Zacarias, J., Capuzzo, M., Kopf, R., Tate, A., Safar, H., Bolle, C., Neilson, D. T., Burrows, E., Kim, K., Bigot-Astruc, M., Achten, F., Sillard, P., Amezcua-Correa, A., Kahn, J. M., Schroder, J., Amezcua-Correa, R., Carpenter, J., IEEE IEEE. 2019
  • Coherent Co-packaged Optical Interfaces for Next-Generation Electrical Switches Buscaino, B., Kahn, J. M., Taylor, B. D., IEEE IEEE. 2019
  • Modal Dynamics in Spatially Multiplexed Links Choutagunta, K., Ryf, R., Fontaine, N., Wittek, S., Alvarado-Zacarias, J., Mazur, M., Chen, H., Essiambre, R., Amezcua-Correa, R., Hayashi, T., Tamura, Y., Hasegawa, T., Taru, T., Kahn, J. M., IEEE IEEE. 2019
  • Scaling SDM Optical Networks Using Full-Spectrum Spatial Switching JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING Jatoba-Neto, A. C., Mello, D. A., Rothenberg, C. E., Arik, S. O., Kahn, J. M. 2018; 10 (12): 991–1004
  • Characterizing Mode-Dependent Loss and Gain in Multimode Components JOURNAL OF LIGHTWAVE TECHNOLOGY Choutagunta, K., Arik, S. O., Ho, K., Kahn, J. M. 2018; 36 (18): 3815–23
  • Data center links beyond 100 Gbit/s per wavelength OPTICAL FIBER TECHNOLOGY Perin, J., Shastri, A., Kahn, J. M. 2018; 44: 69–85
  • Measurement-Based Optimization of Channel Powers With Non-Gaussian Nonlinear Interference Noise JOURNAL OF LIGHTWAVE TECHNOLOGY Roberts, I., Kahn, J. M. 2018; 36 (13): 2746–56
  • Low-Complexity Implementation of Convex Optimization-Based Phase Retrieval JOURNAL OF LIGHTWAVE TECHNOLOGY Arik, S. O., Kahn, J. M. 2018; 36 (12): 2358–65
  • Channel Power Optimization of WDM Systems Following Gaussian Noise Nonlinearity Model in Presence of Stimulated Raman Scattering (vol 35, pg 5237, 2017) JOURNAL OF LIGHTWAVE TECHNOLOGY Roberts, I., Kahn, J. M., Harley, J., Boertjes, D. 2018; 36 (11): 2309
  • Approaching fundamental limits to free-space communication through atmospheric turbulence Belmonte, A., Kahn, J. M., Dingel, B. B., Tsukamoto, K., Mikroulis, S. SPIE-INT SOC OPTICAL ENGINEERING. 2018

    View details for DOI 10.1117/12.2299623

    View details for Web of Science ID 000450860100010

  • Stable Measurement of Effective Area in Coupled Multi-core Fiber Chou, E. S., Hayashi, T., Nagashima, T., Kahn, J. M., Nakanishi, T., IEEE IEEE. 2018
  • DSP-Free Coherent Receivers for Data Center Links Perin, J., Shastri, A., Kahn, J. M., IEEE IEEE. 2018
  • Data Center Links Beyond 100 Gbit/s per Wavelength Perin, J., Shastri, A., Kahn, J. M., He, S., Lee, E. H. SPIE-INT SOC OPTICAL ENGINEERING. 2018

    View details for DOI 10.1117/12.2292774

    View details for Web of Science ID 000455780300020

  • Improving the Capacity of Terrestrial and Submarine Systems via Channel Power Optimization Perin, J., Roberts, I., Kahn, J. M., Jaworski, M., Marciniak, M. IEEE. 2018
  • Channel Power Optimization of WDM Systems Following Gaussian Noise Nonlinearity Model in Presence of Stimulated Raman Scattering JOURNAL OF LIGHTWAVE TECHNOLOGY Roberts, I., Kahn, J. M., Harley, J., Boertjes, D. W. 2017; 35 (23): 5237–49
  • Optical MIMO Signal Processing for Direct-Detection Mode-Division Multiplexing Choutagunta, K., Arik, S. O., Moradshahi, M., Kahn, J. M., IEEE IEEE. 2017
  • Scaling Optical Networks Using Full-Spectrum Spatial Switching Jatoba-Neto, A. C., Rothenberg, C. E., Mello, D. A., Arik, S. O., Kahn, J. M., IEEE IEEE. 2017
  • Sensitivity Improvement in 100 Gb/s-per-Wavelength Links Using Semiconductor Optical Amplifiers or Avalanche Photodiodes JOURNAL OF LIGHTWAVE TECHNOLOGY Perin, J. K., Sharif, M., Kahn, J. M. 2016; 34 (23): 5542-5553
  • Direct-detection mode-division multiplexing in modal basis using phase retrieval OPTICS LETTERS Arik, S. O., Kahn, J. M. 2016; 41 (18): 4265-4268

    Abstract

    Mode-division multiplexing (MDM) can increase the capacity of direct-detection short-reach systems in proportion to the number of modes employed. MDM requires compensation of modal crosstalk at a transmitter or receiver by the multi-input multi-output (MIMO) signal processing. We show that the channel estimation required for the MIMO processing in a basis of modes can be expressed as a phase retrieval problem. We propose three techniques for the estimation: sparse training sequences, convex optimization (CO) and alternating minimization. We demonstrate the superior performance of the CO technique.

    View details for DOI 10.1364/OL.41.004265

    View details for Web of Science ID 000384126300030

    View details for PubMedID 27628373

  • Space-time reference with an optical link CLASSICAL AND QUANTUM GRAVITY Berceau, P., Taylor, M., Kahn, J., Hollberg, L. 2016; 33 (13)
  • Convex Channel Power Optimization in Nonlinear WDM Systems Using Gaussian Noise Model JOURNAL OF LIGHTWAVE TECHNOLOGY Roberts, I., Kahn, J. M., Boertjes, D. 2016; 34 (13): 3212-3222
  • Group Delay Management and Multiinput Multioutput Signal Processing in Mode-Division Multiplexing Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Arik, S. O., Ho, K., Kahn, J. M. 2016; 34 (11): 2867-2880
  • Modulation Schemes for Single-Laser 100 Gb/s Links: Multicarrier JOURNAL OF LIGHTWAVE TECHNOLOGY Perin, J. K., Sharif, M., Kahn, J. M. 2015; 33 (24): 5122-5132
  • Capacity limits of spatially multiplexed free-space communication NATURE PHOTONICS Zhao, N., Li, X., Liu, G., Kahn, J. M. 2015; 9 (12): 822-826
  • Delay Spread Reduction in Mode-Division Multiplexing: Mode Coupling Versus Delay Compensation JOURNAL OF LIGHTWAVE TECHNOLOGY Arik, S. O., Ho, K., Kahn, J. M. 2015; 33 (21): 4504-4512
  • Design of flexible multi-mode fiber endoscope OPTICS EXPRESS Gu, R. Y., Mahalati, R. N., Kahn, J. M. 2015; 23 (21): 26905-26918

    Abstract

    Multi-mode fiber (MMF) endoscopes are extremely thin and have higher spatial resolution than conventional endoscopes; however, all current MMF endoscope designs require either that the MMF remain rigid during insertion and imaging or that the orientation of the MMF be known. This limits their possible medical applications. We describe an MMF endoscope design that allows the MMF to be arbitrarily bent as it is maneuvered to the target site prior to imaging. This is achieved by the addition of a partial reflector to the distal end of the MMF, which allows measurement of the mode coupling in the MMF using the reflected light arriving at the proximal end of the MMF. This measurement can be performed while the distal end of the endoscope is not directly accessible, as when the endoscope is being maneuvered. We simulate imaging through such a flexible MMF endoscope, where the MMF is step-index with 1588 spatial modes, and obtain an image even after the mode coupling matrix of the MMF is altered randomly, corresponding to an unknown bending of the MMF.

    View details for DOI 10.1364/OE.23.026905

    View details for Web of Science ID 000366574400003

    View details for PubMedID 26480352

  • Modulation Schemes for Single-Laser 100 Gb/s Links: Single-Carrier JOURNAL OF LIGHTWAVE TECHNOLOGY Sharif, M., Perin, J. K., Kahn, J. M. 2015; 33 (20): 4268-4277
  • Long-Period Fiber Gratings for Mode Coupling in Mode-Division-Multiplexing Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Askarov, D., Kahn, J. M. 2015; 33 (19): 4032-4038
  • Performance of Direct-Detection Mode-Group-Division Multiplexing Using Fused Fiber Couplers JOURNAL OF LIGHTWAVE TECHNOLOGY Gasulla, I., Kahn, J. M. 2015; 33 (9): 1748-1760
  • Roles of spectral and spatial aggregation in optical network scaling Conference on Next-Generation Optical Communication - Components, Sub-Systems, and Systems IV Arik, S. O., Ho, K. P., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2015

    View details for DOI 10.1117/12.2082656

    View details for Web of Science ID 000350275100006

  • Array Receivers in Downlink Coherent Lasercom Conference on Free-Space Laser Communication and Atmospheric Propagation XXVII Belmonte, A., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2015

    View details for DOI 10.1117/12.2079505

    View details for Web of Science ID 000353710100005

  • MIMO signal processing in mode-division multiplexing systems Conference on Optical Metro Networks and Short-Haul Systems VII Arik, S. O., Askarov, D., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2015

    View details for DOI 10.1117/12.2081299

    View details for Web of Science ID 000354523400001

  • Optical network scaling: roles of spectral and spatial aggregation OPTICS EXPRESS Arik, S. O., Ho, K., Kahn, J. M. 2014; 22 (24): 29868-29887

    Abstract

    As the bit rates of routed data streams exceed the throughput of single wavelength-division multiplexing channels, spectral and spatial traffic aggregation become essential for optical network scaling. These aggregation techniques reduce network routing complexity by increasing spectral efficiency to decrease the number of fibers, and by increasing switching granularity to decrease the number of switching components. Spectral aggregation yields a modest decrease in the number of fibers but a substantial decrease in the number of switching components. Spatial aggregation yields a substantial decrease in both the number of fibers and the number of switching components. To quantify routing complexity reduction, we analyze the number of multi-cast and wavelength-selective switches required in a colorless, directionless and contentionless reconfigurable optical add-drop multiplexer architecture. Traffic aggregation has two potential drawbacks: reduced routing power and increased switching component size.

    View details for DOI 10.1364/OE.22.029868

    View details for Web of Science ID 000345770500055

  • Optical network scaling: roles of spectral and spatial aggregation. Optics express Arik, S. Ö., Ho, K., Kahn, J. M. 2014; 22 (24): 29868-29887

    Abstract

    As the bit rates of routed data streams exceed the throughput of single wavelength-division multiplexing channels, spectral and spatial traffic aggregation become essential for optical network scaling. These aggregation techniques reduce network routing complexity by increasing spectral efficiency to decrease the number of fibers, and by increasing switching granularity to decrease the number of switching components. Spectral aggregation yields a modest decrease in the number of fibers but a substantial decrease in the number of switching components. Spatial aggregation yields a substantial decrease in both the number of fibers and the number of switching components. To quantify routing complexity reduction, we analyze the number of multi-cast and wavelength-selective switches required in a colorless, directionless and contentionless reconfigurable optical add-drop multiplexer architecture. Traffic aggregation has two potential drawbacks: reduced routing power and increased switching component size.

    View details for DOI 10.1364/OE.22.029868

    View details for PubMedID 25606917

  • Frequency-Derivative Measurement Technique for Dispersive Effects in Single-Mode Fiber Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Askarov, D., Szafraniec, B., Baney, D. M., Kahn, J. M. 2014; 32 (22): 3854-3861
  • Wavelength-Selective Switches for Mode-Division Multiplexing: Scaling and Performance Analysis JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K., Kahn, J. M., Wilde, J. P. 2014; 32 (22): 3724-3735
  • Noise-reduction algorithms for optimization-based imaging through multi-mode fiber OPTICS EXPRESS Gu, R. Y., Mahalati, R. N., Kahn, J. M. 2014; 22 (12): 15118-15132

    Abstract

    Three modifications are shown to improve resolution and reduce noise amplification in endoscopic imaging through multi-mode fiber using optimization-based reconstruction (OBR). First, random sampling patterns are replaced by sampling patterns designed to have more nearly equal singular values. Second, the OBR algorithm uses a point-spread function based on the estimated spatial frequency spectrum of the object. Third, the OBR algorithm gives less weight to modes having smaller singular values. In simulations for a step-index fiber supporting 522 spatial modes, the modifications yield a 20% reduction in image error (l(2) norm) in the noiseless case, and a further 33% reduction in image error at a 22-dB shot noise-limited SNR as compared to the original method using random sampling patterns and OBR.

    View details for DOI 10.1364/OE.22.015118

    View details for Web of Science ID 000338044300103

  • Noise-reduction algorithms for optimization-based imaging through multi-mode fiber. Optics express Gu, R. Y., Mahalati, R. N., Kahn, J. M. 2014; 22 (12): 15118-15132

    Abstract

    Three modifications are shown to improve resolution and reduce noise amplification in endoscopic imaging through multi-mode fiber using optimization-based reconstruction (OBR). First, random sampling patterns are replaced by sampling patterns designed to have more nearly equal singular values. Second, the OBR algorithm uses a point-spread function based on the estimated spatial frequency spectrum of the object. Third, the OBR algorithm gives less weight to modes having smaller singular values. In simulations for a step-index fiber supporting 522 spatial modes, the modifications yield a 20% reduction in image error (l(2) norm) in the noiseless case, and a further 33% reduction in image error at a 22-dB shot noise-limited SNR as compared to the original method using random sampling patterns and OBR.

    View details for DOI 10.1364/OE.22.015118

    View details for PubMedID 24977605

  • Diversity-multiplexing tradeoff in mode-division multiplexing. Optics letters Arik, S. Ö., Kahn, J. M. 2014; 39 (11): 3258-3261

    Abstract

    The capacity of mode-division multiplexing (MDM) systems is limited, for a given outage probability, by mode-dependent loss (MDL) and gain. Modal degrees of freedom may be exploited to increase transmission rate (multiplexing gain) or lower outage probability (diversity gain), but there is a fundamental tradeoff between the achievable multiplexing and diversity gains. In this Letter, we present the diversity-multiplexing tradeoff in MDM systems for the first time, studying the impact of signal-to-noise ratio, MDL, and frequency diversity order on the tradeoff in the strong-mode-coupling regime.

    View details for DOI 10.1364/OL.39.003258

    View details for PubMedID 24876027

  • Adaptive Modal Gain Equalization Techniques in Multi-Mode Erbium-Doped Fiber Amplifiers JOURNAL OF LIGHTWAVE TECHNOLOGY Mahalati, R. N., Askarov, D., Kahn, J. M. 2014; 32 (11): 2133-2143
  • Adaptive Frequency-Domain Equalization in Mode-Division Multiplexing Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Arik, S. O., Askarov, D., Kahn, J. M. 2014; 32 (10)
  • Variable-Bandwidth Superchannels Using Synchronized Colorless Transceivers JOURNAL OF LIGHTWAVE TECHNOLOGY Sharif, M., Kahn, J. M. 2014; 32 (10): 1921-1929
  • MIMO Signal Processing for Mode-Division Multiplexing [An overview of channel models and signal processing architectures] IEEE SIGNAL PROCESSING MAGAZINE Arik, S. O., Kahn, J. M., Ho, K. 2014; 31 (2): 25-34
  • Coded Modulation for Fiber-Optic Networks [Toward better tradeoff between signal processing complexity and optical transparent reach] IEEE SIGNAL PROCESSING MAGAZINE Beygi, L., Agrell, E., Kahn, J. M., Karlsson, M. 2014; 31 (2): 93-103
  • Linear Propagation Effects in Mode-Division Multiplexing Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K., Kahn, J. M. 2014; 32 (4): 614-628
  • Optical Networking With Variable-Code-Rate Transceivers JOURNAL OF LIGHTWAVE TECHNOLOGY Mello, D. A., Barreto, A. N., de Lima, T. C., Portela, T. F., Beygi, L., Kahn, J. M. 2014; 32 (2): 257-266
  • Rate-Adaptive Coded Modulation for Fiber-Optic Communications JOURNAL OF LIGHTWAVE TECHNOLOGY Beygi, L., Agrell, E., Kahn, J. M., Karlsson, M. 2014; 32 (2): 333-343
  • Rate-Adaptive Coded Modulation for Fiber-Optic Communications J.of Lightwave Technol. Beygi, L., Agrell, E., Kahn, J., M. 2014; 32 (2): 333-343
  • Multimode Transmission Technologies 19th OptoElectronics and Communication Conference (OECC) / 39th Australian Conference on Optical Fibre Technology (ACOFT) Ip, E., Li, M., Gu, R. Y., Kahn, J. IEEE. 2014: 237–239
  • Optical Networking with Variable-Code-Rate Transceivers J. of Lightwave Technol. Mello, D., A. A., Barreto, A., N., Lima, T., C., Portela, T., F., Beygi, L., Kahn, J., M. 2014; 32 (2): 257-266
  • Coupled-Core Multi-Core Fibers for Spatial Multiplexing IEEE PHOTONICS TECHNOLOGY LETTERS Arik, S. O., Kahn, J. M. 2013; 25 (21): 2054-2057
  • Sequential Optimization of Adaptive Arrays in Coherent Laser Communications JOURNAL OF LIGHTWAVE TECHNOLOGY Belmonte, A., Kahn, J. M. 2013; 31 (9): 1383-1387
  • Effect of Mode Coupling on Signal Processing Complexity in Mode-Division Multiplexing JOURNAL OF LIGHTWAVE TECHNOLOGY Arik, S. O., Askarov, D., Kahn, J. M. 2013; 31 (3): 423-431
  • Resolution limits for imaging through multi-mode fiber OPTICS EXPRESS Mahalati, R. N., Gu, R. Y., Kahn, J. M. 2013; 21 (2): 1656-1668

    Abstract

    We experimentally demonstrate endoscopic imaging through a multi-mode fiber (MMF) in which the number of resolvable image features approaches four times the number of spatial modes per polarization propagating in the fiber. In our method, a sequence of random field patterns is input to the fiber, generating a sequence of random intensity patterns at the output, which are used to sample an object. Reflected power values are returned through the fiber and linear optimization is used to reconstruct an image. The factor-of-four resolution enhancement is due to mixing of modes by the squaring inherent in field-to-intensity conversion. The incoherent point-spread function (PSF) at the center of the fiber output plane is an Airy disk equivalent to the coherent PSF of a conventional diffraction-limited imaging system having a numerical aperture twice that of the fiber. All previous methods for imaging through MMF can only resolve a number of features equal to the number of modes. Most of these methods use localized intensity patterns for sampling the object and use local image reconstruction.

    View details for Web of Science ID 000315989500034

    View details for PubMedID 23389151

  • Mode-Division Multiplexing Systems: Propagation Effects, Performance and Complexity Conference on Optical Fiber Communication (OFC)/National Fiber Optic Engineers Conference (NFOEC) Kahn, J. M., Ho, K. IEEE. 2013
  • Experimental Demonstration of a Spatial Light Modulator-based Few-Mode Fiber Switch for Space-Division Multiplexing Gu, R., Y., Ip, E., Li, M., J., Huang, Y., K, Kahn, J., M. 2013
  • Adaptive Control of Mode-Dependent Gain in Multi-Mode Erbium-Doped Fiber Amplifiers Mahalati, R., Nasiri, Askarov, D., Kahn, J., M. 2013
  • Mode Coupling and its Impact on Spatially Multiplexed Systems Optical Fiber Telecommunications VI B: Systems and Networks Ho, K., P., Kahn, J., M. edited by Kaminow, I., P., Li, T., Willner, A., E. Elsevier, Amsterdam. 2013: 1
  • The Time-Reversed Twin Nature Photonics Ip, E., Kahn, J., M. 2013; 7: 507-508
  • Four-Fold Resolution Increase in Scan-Free Single-Fiber Endoscopic Imaging SU2P Symposium, Glasgow Kahn, J., M. 2013
  • Adaptive Control of Mode-Dependent Gain in Multi-Mode Erbium-Doped Fiber Amplifiers IEEE-Photonics-Society Summer Topical Meeting Mahalati, R. N., Askarov, D., Kahn, J. M. IEEE. 2013: 107–108
  • Design of Transmission Fibers and Doped Fiber Amplifiers for Mode-Division Multiplexing IEEE PHOTONICS TECHNOLOGY LETTERS Askarov, D., Kahn, J. M. 2012; 24 (21): 1945-1948
  • Delay-Spread Distribution for Multimode Fiber With Strong Mode Coupling IEEE PHOTONICS TECHNOLOGY LETTERS Ho, K., Kahn, J. M. 2012; 24 (21): 1906-1909
  • Rate-Adaptive Modulation and Low-Density Parity-Check Coding for Optical Fiber Transmission Systems JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING Gho, G., Kahn, J. M. 2012; 4 (10): 760-768
  • Bandwidth-Scalable Long-Haul Transmission Using Synchronized Colorless Transceivers and Efficient Wavelength-Selective Switches JOURNAL OF LIGHTWAVE TECHNOLOGY Barros, D. J., Kahn, J. M., Wilde, J. P., Abou Zeid, T. 2012; 30 (16): 2646-2660
  • Adaptive control of input field to achieve desired output intensity profile in multimode fiber with random mode coupling OPTICS EXPRESS Mahalati, R. N., Askarov, D., Wilde, J. P., Kahn, J. M. 2012; 20 (13): 14321-14337

    Abstract

    We develop a method for synthesis of a desired intensity profile at the output of a multimode fiber (MMF) with random mode coupling by controlling the input field distribution using a spatial light modulator (SLM) whose complex reflectance is piecewise constant over a set of disjoint blocks. Depending on the application, the desired intensity profile may be known or unknown a priori. We pose the problem as optimization of an objective function quantifying, and derive a theoretical lower bound on the achievable objective function. We present an adaptive sequential coordinate ascent (SCA) algorithm for controlling the SLM, which does not require characterizing the full transfer characteristic of the MMF, and which converges to near the lower bound after one pass over the SLM blocks. This algorithm is faster than optimizations based on genetic algorithms or random assignment of SLM phases. We present simulated and experimental results applying the algorithm to forming spots of light at a MMF output, and describe how the algorithm can be applied to imaging.

    View details for Web of Science ID 000305473000070

    View details for PubMedID 22714494

  • Rate-Adaptive Modulation and Coding for Optical Fiber Transmission Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Gho, G., Kahn, J. M. 2012; 30 (12): 1818-1828
  • Effect of fog on free-space optical links employing imaging receivers OPTICS EXPRESS Mahalati, R. N., Kahn, J. M. 2012; 20 (2): 1649-1661

    Abstract

    We analyze free-space optical links employing imaging receivers in the presence of misalignment and atmospheric effects, such as haze, fog or rain. We present a detailed propagation model based on the radiative transfer equation. We also compare the relative importance of two mechanisms by which these effects degrade link performance: signal attenuation and image blooming. We show that image blooming dominates over attenuation, except under medium-to-heavy fog conditions.

    View details for Web of Science ID 000300057700092

    View details for PubMedID 22274507

  • Comparison of Orthogonal Frequency-Division Multiplexing and Pulse-Amplitude Modulation in Indoor Optical Wireless Links IEEE TRANSACTIONS ON COMMUNICATIONS Barros, D. J., Wilson, S. K., Kahn, J. M. 2012; 60 (1): 153-163
  • Blind Adaptation of Channel-Matched Receivers in Free-Space Coherent Laser Communication Belmonte, A., Kahn, J., M. 2012
  • Multi-Carrier versus Single-Carrier Intensity Modulation Techniques for Indoor Optical Wireless Links Kahn, J., M., Barros, Daniel, J. F., Wilson, S. K. 2012
  • Field Conjugation Adaptive Arrays for Reliable Space Downlink Coherent Laser Communications Belmonte, A., Kahn, J., M. 2012
  • Mode Coupling Effects in Mode-Division-Multiplexed Systems Kahn, J., M., Ho, K., P. 2012
  • Design of Multi-Mode Erbium-Doped Fiber Amplifiers for Low Mode-Dependent Gain Askarov, D., Kahn, J., M. 2012
  • Mode-Coupling Effects in Multimode Fibers Kahn, J., M., Ho, K., P., Shemirani, M., B. 2012
  • Mode Coupling in Coherent Mode-Division-Multiplexed Systems: Impact on Capacity and Signal Processing Complexity 46th Asilomar Conference on Signals, Systems and Computers Kahn, J. M., Ho, K. IEEE. 2012: 650–653
  • Frequency Diversity in Mode-Division Multiplexing Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K., Kahn, J. M. 2011; 29 (24): 3719-3726
  • Statistics of Group Delays in Multimode Fiber With Strong Mode Coupling JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K., Kahn, J. M. 2011; 29 (21): 3119-3128
  • Field Conjugation Adaptive Arrays in Free-Space Coherent Laser Communications JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING Belmonte, A., Kahn, J. M. 2011; 3 (11): 830-838
  • Mode-dependent loss and gain: statistics and effect on mode-division multiplexing OPTICS EXPRESS Ho, K., Kahn, J. M. 2011; 19 (17): 16612-16635

    Abstract

    In multimode fiber transmission systems, mode-dependent loss and gain (collectively referred to as MDL) pose fundamental performance limitations. In the regime of strong mode coupling, the statistics of MDL (expressed in decibels or log power gain units) can be described by the eigenvalue distribution of zero-trace Gaussian unitary ensemble in the small-MDL region that is expected to be of interest for practical long-haul transmission. Information-theoretic channel capacities of mode-division-multiplexed systems in the presence of MDL are studied, including average and outage capacities, with and without channel state information.

    View details for Web of Science ID 000293894900099

    View details for PubMedID 21935025

  • Comparison of Orthogonal Frequency-Division Multiplexing and ON-OFF Keying in Direct-Detection Multimode Fiber Links JOURNAL OF LIGHTWAVE TECHNOLOGY Barros, D. J., Kahn, J. M. 2011; 29 (15): 2299-2309
  • Principal Modes in Graded-Index Multimode Fiber in Presence of Spatial- and Polarization-Mode Coupling (vol 27, pg 1248, 2009) JOURNAL OF LIGHTWAVE TECHNOLOGY Shemirani, M. B., Mao, W., Panicker, R. A., Kahn, J. M. 2011; 29 (12): 1901-1901
  • Experimental demonstration of two methods for controlling the group delay in a system with photonic-crystal resonators coupled to a waveguide OPTICS LETTERS Huo, Y., Sandhu, S., Pan, J., Stuhrmann, N., Povinelli, M. L., Kahn, J. M., Harris, J. S., Fejer, M. M., Fan, S. 2011; 36 (8): 1482-1484

    Abstract

    We measure the group delay in an on-chip photonic-crystal device with two resonators side coupled to a waveguide. We demonstrate that such a group delay can be controlled by tuning either the propagation phase of the waveguide or the frequency of the resonators.

    View details for Web of Science ID 000290034500059

    View details for PubMedID 21499397

  • Rate-Adaptive Coding for Optical Fiber Transmission Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Gho, G., Klak, L., Kahn, J. M. 2011; 29 (2): 222-233
  • Rate-adaptive modulation and coding for optical fiber transmission systems Conference on Coherent Optical Communication - Components, Subsystems, and Systems Gho, G., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2011

    View details for DOI 10.1117/12.881421

    View details for Web of Science ID 000294061300007

  • Performance Analysis of Atmospheric Field Conjugation Adaptive Arrays Conference on Free-Space Laser Communication Technologies XXIII Belmonte, A., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2011

    View details for DOI 10.1117/12.873056

    View details for Web of Science ID 000297975300021

  • System Architecture for Bandwidth-Scalable OFDM Long-Haul Transmission Barros, D., J. F., Kahn, J., M., Wilde, J., P., Zeid, T., Abou 2011
  • Field Conjugation Adaptive Arrays in Atmospheric Coherent Optical Links Belmonte, A., Kahn, J., M. 2011
  • Bandwidth-Scalable OFDM Long-Haul Transmission Kahn, J., M. 2011
  • Spot Formation and Scanning Microscopy via Multimode Fibers IEEE Photonics Conference (PHO) Boucher, K. J., Jan, C., Kahn, J. M., Wilde, J. P., Solgaard, O. IEEE. 2011: 713–714
  • Comparison of Multi-Carrier and Single-Carrier Intensity Modulation Techniques for Indoor Optical Wireless Links IEEE Photonics Conference (PHO) Barros, D. J., Kahn, J. M., Wilson, S. K. IEEE. 2011: 294–295
  • Adaptive Compensation of Multimode Fiber Dispersion by Control of Launched Amplitude, Phase, and Polarization JOURNAL OF LIGHTWAVE TECHNOLOGY Shemirani, M. B., Wilde, J. P., Kahn, J. M. 2010; 28 (18): 2627-2639
  • Capacity of coherent free-space optical links using diversity-combining techniques (vol 17, pg 12601, 2009) OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2010; 18 (17): 17748-17748
  • Compensation of Multimode Fiber Dispersion by Optimization of Launched Amplitude, Phase, and Polarization JOURNAL OF LIGHTWAVE TECHNOLOGY Shemirani, M. B., Kahn, J. M. 2010; 28 (14): 2084-2095
  • Comparison of Orthogonal Frequency-Division Multiplexing and On-Off Keying in Amplified Direct-Detection Single-Mode Fiber Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Barros, D. J., Kahn, J. M. 2010; 28 (12): 1811-1820
  • Hiding Single Photons with Spread Spectrum Technology PHYSICAL REVIEW LETTERS Belthangady, C., Chuu, C., Yu, I. A., Yin, G. Y., Kahn, J. M., Harris, S. E. 2010; 104 (22)

    Abstract

    We describe a proof-of-principal experiment demonstrating the use of spread spectrum technology at the single photon level. We show how single photons with a prescribed temporal shape, in the presence of interfering noise, may be hidden and recovered.

    View details for DOI 10.1103/PhysRevLett.104.223601

    View details for Web of Science ID 000278207500009

    View details for PubMedID 20867167

  • Fiber Impairment Compensation Using Coherent Detection and Digital Signal Processing JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E. M., Kahn, J. M. 2010; 28 (4): 502-519
  • Efficiency of complex modulation methods in coherent free-space optical links OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2010; 18 (4): 3928-3937

    Abstract

    We study the performance of various binary and nonbinary modulation methods applied to coherent laser communication through the turbulent atmosphere. We compare the spectral efficiencies and SNR efficiencies of complex modulations, and consider options for atmospheric compensation, including phase correction and diversity combining techniques. Our analysis shows that high communication rates require receivers with good sensitivity along with some technique to mitigate the effect of atmospheric fading.

    View details for Web of Science ID 000274795700077

    View details for PubMedID 20389405

  • OFDM vs. OOK with MLSD for IM/DD Systems Conference on Optical Fiber Communication (OFC)/Collocated National Fiber Optic Engineers (NFOEC) Barros, D. J., Kahn, J. M. IEEE. 2010
  • Modulation of Photons and Biphotons Harris, S., E., Belthangady, C., Chuu, C., S., Du, S., Kolchin, P., Sensarn, S., Kahn, Joseph, M. 2010
  • Rate-Adaptive Transmission Techniques for Optical Fiber Systems Kahn, J., M., Gho, G., H. 2010
  • Understanding the Performance of Atmospheric Free-Space Laser Communications Systems using Coherent Detection Belmonte, A., Kahn, J., M. 2010
  • Analysis of a Field-Conjugation Adaptive Array for Coherent Free-Space Optical Links Belmonte, A., Kahn, J., M. 2010
  • Field Conjugation Adaptive Arrays in Atmospheric Coherent Optical Links Belmonte, A., Kahn, J., M. 2010
  • Rate-Adaptive Coding for Optical Fiber Transmission Systems Gho, G., H., Kahn, J., M. 2010
  • Understanding the performance of atmospheric free-space laser communications systems using coherent detection Conference on Atmospheric and Oceanic Propagation of Electromagnetic Waves IV Belmonte, A., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2010

    View details for DOI 10.1117/12.845069

    View details for Web of Science ID 000284396600001

  • Principal Modes in Multimode Fiber: Modeling and Compensation of Dispersion Shemirani, M., B., Kahn, J., M. VDM Verlag, Saarbrücken, Germany. 2010: 1
  • Field Conjugation Adaptive Arrays in Atmospheric Coherent Optical Links Globecom Workshops Belmonte, A., Kahn, J. M. IEEE. 2010: 1026–1030
  • Algorithms for Compensation of Multimode Fiber Dispersion Using Adaptive Optics JOURNAL OF LIGHTWAVE TECHNOLOGY Panicker, R. A., Kahn, J. M. 2009; 27 (24): 5790-5799
  • Experimental Comparison of Adaptive Optics Algorithms in 10-Gb/s Multimode Fiber Systems JOURNAL OF LIGHTWAVE TECHNOLOGY Panicker, R. A., Lau, A. P., Wilde, J. P., Kahn, J. M. 2009; 27 (24): 5783-5789
  • Higher-Order Modal Dispersion in Graded-Index Multimode Fiber JOURNAL OF LIGHTWAVE TECHNOLOGY Shemirani, M. B., Kahn, J. M. 2009; 27 (23): 5461-5468
  • Capacity of coherent free-space optical links using diversity-combining techniques OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2009; 17 (15): 12601-12611

    Abstract

    We study the performance of diversity combining techniques applied to synchronous laser communication through the turbulent atmosphere. We assume that a single information-bearing signal is transmitted over two or more statistically independent fading channels, and that the multiple replicas are combined at the receiver to improve detection efficiency. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise. We study the effect of various parameters, including the ratio of receiver aperture diameter to wavefront coherence diameter, the scintillation index, and the number of independent diversity branches combined at the receiver. We consider both maximal-ratio combining (MRC) and selective combining (SC) diversity schemes. We derive expressions for the outage Shannon capacity, thus placing upper bounds on the spectral efficiency achievable using these techniques.

    View details for Web of Science ID 000268399500042

    View details for PubMedID 19654664

  • Feedforward Carrier Recovery for Coherent Optical Communications (vol25, pg 2675, 2007) JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2009; 27 (13): 2552-2553
  • Optical Modulator Optimization for Orthogonal Frequency-Division Multiplexing JOURNAL OF LIGHTWAVE TECHNOLOGY Barros, D. J., Kahn, J. M. 2009; 27 (13): 2370-2378
  • Principal Modes in Graded-Index Multimode Fiber in Presence of Spatial- and Polarization-Mode Coupling JOURNAL OF LIGHTWAVE TECHNOLOGY Shemirani, M. B., Mao, W., Panicker, R. A., Kahn, J. M. 2009; 27 (10): 1248-1261
  • Capacity of coherent free-space optical links using atmospheric compensation techniques OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2009; 17 (4): 2763-2773

    Abstract

    We analyze the ergodic capacity and epsilon-outage capacity of coherent optical links through the turbulent atmosphere. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise, for both passive receivers and those employing active modal compensation of wavefront phase distortion. We study the effect of various parameters, including the ratio of receiver aperture diameter to wavefront coherence diameter, the strength of the scintillation index, and the number of modes compensated.

    View details for Web of Science ID 000263432500071

    View details for PubMedID 19219181

  • Frequency Noise Characterization of a Widely Tunable Narrow-Linewidth DFB Laser Array Source Conference on Optical Fiber Communication (OFC 2009) Wilde, J. P., Yoffe, G. W., Kahn, J. M. IEEE. 2009: 348–350
  • Principles of Digital Coherent Receivers for Optical Communications Kahn, J., M., Ip, E. 2009
  • Nonlinear Impairment Compensation using Backpropagation Optical Fibre, New Developments Ip, E., Kahn, J., M. edited by Lethien, C. In-Tech, Vienna Austria. 2009: 1
  • Fundamental Limits on Diversity Coherent Reception on Atmospheric Optical Channels Belmonte, A., Kahn, J., M. 2009
  • Addendum to: Feedforward Carrier Recovery for Coherent Optical Communications J. of Lightwave Technol. Ip, E., Kahn, J., M. 2009; 27 (13): 2552-2553
  • Principal Modes in Graded-Index Multimode Fibers Shemirani, M., B., Kahn, J., M. 2009
  • Effects of Atmospheric Compensation Techniques on the Performance of Synchronous Receivers Belmonte, A., Kahn, J., M. 2009
  • Coherent detection in optical fiber systems (vol 16, pg 753, 2008) OPTICS EXPRESS Ip, E., Lau, A. P., Barros, D. J., Kahn, J. M. 2008; 16 (26): 21943-21943
  • Compensation of Dispersion and Nonlinear Impairments Using Digital Backpropagation JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2008; 26 (17-20): 3416-3425
  • Performance of synchronous optical receivers using atmospheric compensation techniques OPTICS EXPRESS Belmonte, A., Kahn, J. M. 2008; 16 (18): 14151-14162

    Abstract

    We model the impact of atmospheric turbulence-induced phase and amplitude fluctuations on free-space optical links using synchronous detection. We derive exact expressions for the probability density function of the signal-to-noise ratio in the presence of turbulence. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise, for both passive receivers and those employing active modal compensation of wave-front phase distortion. We compute error probabilities for M-ary phase-shift keying, and evaluate the impact of various parameters, including the ratio of receiver aperture diameter to the wave-front coherence diameter, and the number of modes compensated.

    View details for Web of Science ID 000259270600068

    View details for PubMedID 18773024

  • On the Statistics of Intrachannel Four-Wave Mixing in Phase-Modulated Optical Communication Systems Conference on Optical Fiber Communications/National Fiber Optic Engineers Conference Lau, A. P., Rabbani, S., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2008: 2128–35
  • Lattice codes for amplified direct-detection optical systems IEEE TRANSACTIONS ON COMMUNICATIONS Mao, W., Kahn, J. M. 2008; 56 (7): 1137-1145
  • Optimized Dispersion Compensation Using Orthogonal Frequency-Division Multiplexing JOURNAL OF LIGHTWAVE TECHNOLOGY Barros, D. J., Kahn, J. M. 2008; 26 (13-16): 2889-2898
  • Compensation of multimode fiber dispersion using adaptive optics via convex optimization JOURNAL OF LIGHTWAVE TECHNOLOGY Panicker, R. A., Kahn, J. M., Boyd, S. P. 2008; 26 (9-12): 1295-1303
  • Coherent detection in optical fiber systems OPTICS EXPRESS Ip, E., Lau, A. P., Barros, D. J., Kahn, J. M. 2008; 16 (2): 753-791

    Abstract

    The drive for higher performance in optical fiber systems has renewed interest in coherent detection. We review detection methods, including noncoherent, differentially coherent, and coherent detection, as well as a hybrid method. We compare modulation methods encoding information in various degrees of freedom (DOF). Polarization-multiplexed quadrature-amplitude modulation maximizes spectral efficiency and power efficiency, by utilizing all four available DOF, the two field quadratures in the two polarizations. Dual-polarization homodyne or heterodyne downconversion are linear processes that can fully recover the received signal field in these four DOF. When downconverted signals are sampled at the Nyquist rate, compensation of transmission impairments can be performed using digital signal processing (DSP). Linear impairments, including chromatic dispersion and polarization-mode dispersion, can be compensated quasi-exactly using finite impulse response filters. Some nonlinear impairments, such as intra-channel four-wave mixing and nonlinear phase noise, can be compensated partially. Carrier phase recovery can be performed using feedforward methods, even when phase-locked loops may fail due to delay constraints. DSP-based compensation enables a receiver to adapt to time-varying impairments, and facilitates use of advanced forward-error-correction codes. We discuss both single- and multi-carrier system implementations. For a given modulation format, using coherent detection, they offer fundamentally the same spectral efficiency and power efficiency, but may differ in practice, because of different impairments and implementation details. With anticipated advances in analog-to-digital converters and integrated circuit technology, DSP-based coherent receivers at bit rates up to 100 Gbit/s should become practical within the next few years.

    View details for Web of Science ID 000252479700030

    View details for PubMedID 18542153

  • QPSK Transmission over Free-Space Link at 3.8 mu m using Coherent Detection with Wavelength Conversion 34th European Conference on Optical Communication (ECOC) Ip, E., Buechter, D., Langrock, C., Kahn, J. M., Herrmann, H., Sohler, W., Fejer, M. M. IEEE. 2008
  • Performance of Synchronous or Nonsynchronous Receivers Using Atmospheric Compensation Techniques Belmonte, A., Kahn, J., M. 2008
  • Compensation of Dispersion and Nonlinearity in WDM Transmission using Simplified Digital Backpropagation Ip, E., Lau, A., P. T., Barros, D., J. F., Kahn, J., M. 2008
  • Communication Techniques and Coding for Atmospheric Turbulence Channels Free-Space Laser Communications: Principles and Advances Zhu, X., Kahn, J., M. edited by Majumdar, A., K., Ricklin, J., C. Springer, New York. 2008: 1
  • Compensation of Chromatic Dispersion and Nonlinearity using Simplified Digital Backpropagation Ip, E., Lau, A., P. T., Barros, D., J. F., Kahn, J., M. 2008
  • Increasing Optical Fiber Transmission Capacity Beyond Next-Generation Systems Ip, E., Kahn, J., M. 2008
  • Performance of Synchronous Receivers using Atmospheric Compensation Tech-niques Optics Express Belmonte, A., Kahn, J., M. 2008; 16 (18): 14151-14162
  • Compensation of Dispersion and Nonlinearity in WDM Transmission using Simplified Digital Backpropagation IEEE/LEOS Summer Topical Meetings Ip, E., Lau, A. P., Barros, D. J., Kahn, J. M. IEEE. 2008: 123–124
  • On the statistics of intra-channel four-wave mixing in phase-modulated systems Conference on Optical Fiber Communications/National Fiber Optic Engineers Conference Lau, A. P., Rabbani, S., Kahn, J. M. OPTICAL SOC AMERICA. 2008: 154–156
  • Signal design and detection in presence of nonlinear phase noise JOURNAL OF LIGHTWAVE TECHNOLOGY Lau, A. P., Kahn, J. M. 2007; 25 (10): 3008-3016
  • Feedforward carrier recovery for coherent optical communications JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2007; 25 (9): 2675-2692
  • Digital equalization of chromatic dispersion and polarization mode dispersion JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2007; 25 (8): 2033-2043
  • 10 x 10 Gb/s DWDM transmission through 2.2-km multimode fiber using adaptive optics IEEE PHOTONICS TECHNOLOGY LETTERS Panicker, R. A., Wilde, J. P., Kahn, J. M., Welch, D. F., Lyubomirsky, I. 2007; 19 (13-16): 1154-1156
  • Advanced Modulation Formats and Digital Signal Processing in Optical Communications Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference Kahn, J. M., Ip, E. IEEE. 2007: 199–200
  • Compensating Multimode Fiber Dispersion using Adaptive Optics Kahn, J., M. 2007
  • Spectral Efficiency Limits and How to Approach Them Panel Presentation at IEEE LEOS Summer Topical on Advanced Digital Signal Processing in Next-Generation Fiber-Optic Transmission, Portland, OR Kahn, J., M. 2007
  • 16-QAM signal design and detection in presence of nonlinear phase noise IEEE LEOS Summer Topical Meeting 2007 Lau, A. P., Kahn, J. M. IEEE. 2007: 53–54
  • Power profile optimization in phase-modulated systems in presence of nonlinear phase noise IEEE PHOTONICS TECHNOLOGY LETTERS Lau, A. P., Kahn, J. M. 2006; 18 (21-24): 2514-2516
  • Design of inline amplifier gains and spacings to minimize the phase noise in optical transmission systems JOURNAL OF LIGHTWAVE TECHNOLOGY Lau, A. P., Kahn, J. M. 2006; 24 (3): 1334-1341
  • Power spectra of return-to-zero optical signals JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2006; 24 (3): 1610-1618
  • Scanning micromirrors fabricated by an SOI/SOI wafer-bonding process JOURNAL OF MICROELECTROMECHANICAL SYSTEMS Zhou, L. X., Kahn, J. M., Pister, K. S. 2006; 15 (1): 24-32
  • Coherent Optical Communications: Fundamentals and Future Prospects Kahn, J., M., Kazovsky, L., G. 2006
  • Modulation and Detection Techniques for Optical Communication Systems Kahn, J., M. 2006
  • Non-Optimality of Distributed Amplification in Presence of Nonlinear Phase Noise Lau, A., P. T., Kahn, J., M. 2006
  • Electronic Compensation of Linear and Nonlinear Impairments in Phase-Modulated Systems Ho, K., P., Kahn, J., M. 2006
  • Carrier synchronization for 3-and 4-bit-per-symbol optical transmission JOURNAL OF LIGHTWAVE TECHNOLOGY Ip, E., Kahn, J. M. 2005; 23 (12): 4110-4124
  • Compensation for multimode fiber dispersion by adaptive optics OPTICS LETTERS Shen, X. L., Kahn, J. M., Horowitz, M. A. 2005; 30 (22): 2985-2987

    Abstract

    Adaptive optics is used to compensate for modal dispersion in digital transmission through multimode fiber (MMF). At the transmitter, a spatial light modulator (SLM) controls the launched field pattern. An estimate of intersymbol interference (ISI) caused by modal dispersion is formed at the receiver and fed back to the transmitter, where the SLM is adjusted to minimize ISI. Error-free transmission of 10 Gbit/s non-return-to-zero signals through standard 50 microm graded-index MMFs up to 11.1 km long is demonstrated. It is shown that a single SLM can compensate for modal dispersion across a 600 GHz bandwidth.

    View details for Web of Science ID 000233258800005

    View details for PubMedID 16315696

  • Linewidth measurements of MEMS-based tunable lasers for phase-locking applications IEEE PHOTONICS TECHNOLOGY LETTERS Ip, E., Kahn, J. M., Anthon, D., Hutchins, J. 2005; 17 (10): 2029-2031
  • Principal modes in multimode waveguides OPTICS LETTERS Fan, S. H., Kahn, J. M. 2005; 30 (2): 135-137

    Abstract

    We generalize the concept of principal states of polarization and prove the existence of principal modes in multimode waveguides. Principal modes do not suffer from modal dispersion to first order of frequency variation and form orthogonal bases at both the input and the output ends of the waveguide. We show that principal modes are generally different from eigenmodes, even in uniform waveguides, unlike the special case of a single-mode fiber with uniform birefringence. The difference is most pronounced when different eigenmodes possess similar group velocities and when their field patterns vary as a function of frequency. This work may provide a new basis for analysis and control of dispersion in multimode fiber systems.

    View details for Web of Science ID 000226218500007

    View details for PubMedID 15675691

  • Modulation and detection techniques for DWDM systems Topical Meeting on Optical Communication Theory and Techniques Kahn, J. M., Ho, K. P. SPRINGER. 2005: 13–20
  • Electronic Compensation of Nonlinear Phase Noise for Phase-Modulated Signals Ho, K., P., Kahn, J., M. 2005
  • Dispersion limitations in optical systems using offset DPSK modulation Topical Meeting on Optical Communication Theory and Techniques Wang, J., Kahn, J. M. SPRINGER. 2005: 173–179
  • Spectral Efficiency Limits in DWDM Systems Kahn, J., M., Ho, K., P. 2005
  • Compensation of Multimode Fiber Dispersion using Adaptive Optics Shen, X., Kahn, J., M., Horowitz, M., A. 2005
  • Accurate bit-error-ratio computation in nonlinear CRZ-OOK and CRZ-DPSK systems IEEE PHOTONICS TECHNOLOGY LETTERS Wang, J., Kahn, J. M. 2004; 16 (9): 2165-2167
  • Conventional DPSK versus symmetrical DPSK: Comparison of dispersion tolerances IEEE PHOTONICS TECHNOLOGY LETTERS Wang, J., Kahn, J. M. 2004; 16 (6): 1585-1587
  • Performance of electrical equalizers in optically amplified OOK and DPSK systems IEEE PHOTONICS TECHNOLOGY LETTERS Wang, J., Kahn, J. M. 2004; 16 (5): 1397-1399
  • Spectral efficiency limits and modulation/detection techniques for DWDM systems IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS Kahn, J. M., Ho, K. P. 2004; 10 (2): 259-272
  • Electronic compensation technique to mitigate nonlinear phase noise JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K. P., Kahn, J. M. 2004; 22 (3): 779-783
  • Spectrum of externally modulated optical signals JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K. P., Kahn, J. M. 2004; 22 (2): 658-663
  • Free-space heterochronous imaging reception of multiple optical signals IEEE TRANSACTIONS ON COMMUNICATIONS Mao, W., Kahn, J. M. 2004; 52 (2): 269-279
  • Impact of chromatic and polarization-mode dispersions on DPSK systems using interferometric demodulation and direct detection JOURNAL OF LIGHTWAVE TECHNOLOGY Wang, J., Kahn, J. M. 2004; 22 (2): 362-371
  • Free-space Heterochronous Imaging Reception of Multiple Optical Signals IEEE Trans. on Commun. Mao, W., Kahn, J., M. 2004; 52 (2): 269-279
  • Dispersion Limitations in Optical Systems using Offset DPSK Modulation Wang, J., Kahn, J., M. 2004
  • Modulation and Detection Techniques for DWDM Systems Kahn, J., M., Ho, K., P. edited by Forestieri, E. Optical Communication Theory and Techniques. 2004
  • Equalization of modal dispersion in multimode fiber using spatial light modulators IEEE Global Telecommunications Conference (GLOBECOM 04) Alon, E., Stojanovic, V., Kahn, J. M., Boyd, S., Horowitz, M. IEEE. 2004: 1023–1029
  • Dispersion Limitations in Optical Systems using Offset DPSK Modulation Wang, J., Kahn, J., M. edited by Forestieri, E. Optical Communication Theory and Techniques. 2004
  • Equalization of Modal Dispersion in Multimode Fiber using Spatial Light Modulators Alon, E., Stojanović, V., Kahn, J., M., Boyd, S., P., Horowitz, M., A. 2004
  • Performance bounds for coded free-space optical communications through atmospheric turbulence channels IEEE International Conference on Communication Zhu, X. M., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2003: 1233–39
  • Corner-cube retroreflectors based on structure-assisted assembly for free-space optical communication JOURNAL OF MICROELECTROMECHANICAL SYSTEMS Zhou, L. X., Kahn, J. M., Pister, K. S. 2003; 12 (3): 233-242
  • Queueing models of optical delay lines in synchronous and asynchronous optical packet-switching networks OPTICAL ENGINEERING Zhu, X. M., Kahn, J. M. 2003; 42 (6): 1741-1748

    View details for DOI 10.1117/1.1572500

    View details for Web of Science ID 000183373500030

  • Mitigation of turbulence-induced scintillation noise in free-space optical links using temporal-domain detection techniques IEEE PHOTONICS TECHNOLOGY LETTERS Zhu, X. M., Kahn, J. M., Wang, J. 2003; 15 (4): 623-625
  • Markov chain model in maximum-likelihood sequence detection for free-space optical communication through atmospheric turbulence channels IEEE TRANSACTIONS ON COMMUNICATIONS Zhu, X. M., KAHN, J. A. 2003; 51 (3): 509-516
  • Two-axis scanning mirror for free-space optical communication between UAVs IEEE/LEOS International Conference on Optical MEMS Zhou, L., Last, M., Milanovic, V., Kahn, J. M., Pister, K. S. IEEE. 2003: 157–158
  • Queueing Models of Optical Delay Lines in Synchronous and Asynchronous Optical Packet-Switching Networks Optical Engineering Zhu, X., Kahn, J., M. 2003; 42 (6): 1741-1748
  • Communication techniques to mtigate atmospheric turbulence in free-space optical links 16th Annual Meeting of the IEEE Lasers and Electro-Optics Society Zhu, X. M., Kahn, J. M. IEEE. 2003: 89–90
  • Mitigation of Turbulence-Induced Scintillation Noise in Free-Space Optical Links using Temporal-Domain Detection Techniques IEEE Photon. Technol. Lett. Zhu, X., Kahn, J., M., Wang, J. 2003; 15 (4): 623-625
  • Performance Bounds for Coded Free-Space Optical Communications through Atmo-spheric Turbulence Channels IEEE Trans. on Commun. Zhu, X., Kahn, J., M. 2003; 51 (8): 1233-1239
  • Markov Chain Model in Maximum-Likelihood Sequence Detection for Free-Space Opti-cal Communication through Atmospheric Turbulence Channels IEEE Trans. on Commun. Zhu, X., Kahn, J., M. 2003; 51 (3): 509-516
  • Towards a 1 mm3 Camera: The Field Stitching Micromirror Last, M., Zhou, L., Milanović, V., Kahn, J., M., Pister, K., S. J. 2003
  • Communication Techniques to Mitigate Atmospheric Turbulence in Free-Space Optical Links Zhu, X., Kahn, J., M. 2003
  • MEMS for Free-Space Optical Communications Kahn, J., M., Pister, K., S. J., Solgaard, O. 2003
  • Two-Axis Scanning Mirror for Free-Space Optical Communication between UAVs Zhou, L., Last, M., Milanovic, V., Kahn, J., M., Pister, K., S. J. 2003
  • Free-space optical communication through atmospheric turbulence channels IEEE Global Telecommunications Conference (GLOBECOM 00) Zhu, X. M., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2002: 1293–1300
  • Upper-bounding the capacity of optical IM/DD channels with multiple-subcarrier modulation and fixed bias using trigonometric moment space method IEEE TRANSACTIONS ON INFORMATION THEORY You, R., Kahn, J. M. 2002; 48 (2): 514-523
  • Channel Capacity of WDM Systems Using Constant-Intensity Modulation Formats Ho, K., P., Kahn, J., M. 2002
  • Power-efficient multiple-subcarrier modulation scheme for optical wireless communications Conference on Optical Wireless Communications V Yu, B., Kahn, J. M., You, R. SPIE-INT SOC OPTICAL ENGINEERING. 2002: 41–53
  • Optical modeling of MEMS corner cube retroreflectors with misalignment and nonflatness IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS Zhu, X. M., Hsu, V. S., Kahn, J. M. 2002; 8 (1): 26-32
  • Pilot-symbol assisted modulation for correlated turbulent free-space optical channels Conference on Free-Space Laser Communication and Laser Imaging Zhu, X. M., Kahn, J. M. SPIE-INT SOC OPTICAL ENGINEERING. 2002: 138–145
  • Advanced modulation and signal processing techniques for Gb/s optical transmission systems 1st Annual Conference on Optical Transmission Systems and Equipment for WDM Networking Ralston, J. D., Kahn, J. M., Ho, K. P. SPIE-INT SOC OPTICAL ENGINEERING. 2002: 24–31
  • The Role of Electronic Modulation and Signal Processing in Next-Generation Fiber Transport Ralston, J., D., Kahn, J., M., Ho, K., P. 2002
  • An Autonomous 16 mm3 Solar-Powered Node for Distributed Wireless Sensor Networks Warneke, B., A., Scott, M., D., Liebowitz, B., S., Zhou, L., Bellew, C., L., Chediak, J., A., Kahn, Joseph, M. 2002
  • Minimization of Acquisition Time in Short-Range Free-Space Optical Com-munication Applied Optics Wang, J., Kahn, J., M., Lau, K., Y. 2002; 41 (12): 7592-7602
  • Ultimate Spectral Efficiency Limits in DWDM Systems Optical Fiber Commun. Conf. Kahn, J., M. 2002
  • Advanced modulation and signal processing techniques for 40 Gb/s optical transmission systems Conference on Active and Passive Optical Components for WDM Communications II Ralston, J. D., Kahn, J. M., Ho, K. P. SPIE-INT SOC OPTICAL ENGINEERING. 2002: 600–607
  • The role of electronic modulation and signal processing in next generation fiber transport 15th Annual Meeting of the IEEE-Lasers-and-Electro-Optics-Society Ralston, J. D., Kahn, J. M., Ho, K. P. IEEE. 2002: 432–433
  • Optical Modeling of MEMS Corner Cube Retroreflectors with Misalignment and Non-flatness IEEE. J. on Sel. Topics in Quantum Electron. Zhu, X., Hsu, V., S., Kahn, J., M. 2002; 8 (1): 26-32
  • Free-Space Optical Communication through Atmospheric Turbulence Channels IEEE Trans. on Commun. Zhu, X., Kahn, J., M. 2002; 50 (8): 1293-1300
  • Acquisition in Short-range Free-Space Optical Communication Wang, J., Kahn, J., M. 2002
  • Queueing Models of Optical Delay Lines in Synchronized Optical Packet-Switching Net-works with Non-Uniform Traffic Zhu, X., Kahn, J., M. 2002
  • Upper-Bounding the Capacity of Optical IM/DD Channels with Multiple-Subcarrier Modulation and Fixed Bias using Trigonometric Moment Space Method IEEE Trans. on Information Theory You, R., Kahn, J., M. 2002; 48: 514-523
  • Spectral Efficiency and Coherent Detection in Optical Communications Defense Sciences Research Council Workshop on Novel Applications of Optical Coherence, Arlington, VA Kahn, J., M. 2002
  • Assembled corner-cube retroreflector quadruplet 15th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2002) Zhou, L. X., Pister, K. S., Kahn, J. M. IEEE. 2002: 556–559
  • Ultimate Spectral Efficiency Limits in DWDM Systems Kahn, J., M., Ho, K., P. 2002
  • Power-Efficient Multiple-Subcarrier Modulation Scheme for Optical Wireless Communications Yu, B., Kahn, J., M., You, R. 2002
  • Capacity Scaling in MIMO Wireless Systems Under Corre-lated Fading IEEE Trans. on Information Theory Chuah, C., Tse, D., Kahn, J., M., Valenzuela, R., A. 2002; 48: 637-650
  • Spectrally Efficient and Impairment-Robust Modulation Techniques for 40 Gb/s Optical Transmission Systems Ralston, J., D., Kahn, J., M., Ho, K., P. 2002
  • Secure Free-Space Optical Communication Between Moving Platforms Kahn, J., M. 2002
  • Average power reduction techniques for multiple-subcarrier intensity-modulated optical signals IEEE International Conference on Communications You, R., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2001: 2164–71
  • A Bottleneck for Optical Fibres Nature Kahn, J., M., Ho, K., P. 2001; 411: 1007-1010
  • Capacity bound of optical IM/DD channels using multiple-sub carrier modulation with fixed bias 2001 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-10, CONFERENCE RECORD You, R., Kahn, J. M. 2001: 2757-2762
  • Pairwise codeword error probability for coded free-space optical communication through atmospheric turbulence channels 2001 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, VOLS 1-10, CONFERENCE RECORD Zhu, X. M., Kahn, J. M. 2001: 161-164
  • Free-space heterochronous Imaging reception of multiple optical signals 35th Asilomar Conference on Signals, Systems and Computers Mao, W., Kahn, J. M. IEEE. 2001: 18–22
  • Capacity Bound of Optical IM/DD Channels Using Multiple-Subcarrier Modulation with Fixed Bias You, R., Kahn, J., M. 2001
  • Pilot-Symbol Assisted Modulation for Correlated Turbulent Free-Space Optical Chan-nels Zhu, X., Kahn, J., M. 2001
  • Free-space Heterochronous Imaging Reception of Multiple Optical Signals Mao, W., Kahn, J., M. 2001
  • Computing Insertion Loss in MEMS Optical Switches Caused By Non-Flat Mirrors Zhu, X., Kahn, J., M. 2001
  • Average Power Reduction Techniques for Multiple-Subcarrier Intensity-Modulated Opti-cal Signals IEEE Trans. on Commun. You, R., Kahn, J., M. 2001; 49: 2164-2171
  • Pairwise Codeword Error Probability for Coded Free-Space Optical Communication through Atmospheric Turbulence Channels Zhu, X., Kahn, J., M. 2001
  • Analysis of infrared wireless links employing multibeam transmitters and imaging diversity receivers IEEE International Conference on Global Communications (GLOBECOM) Djahani, P., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2000: 2077–88
  • Emerging challenges: Mobile networking for "Smart Dust" JOURNAL OF COMMUNICATIONS AND NETWORKS Kahn, J. M., Katz, R. H., Pister, K. S. 2000; 2 (3): 188-196
  • Angle diversity for nondirected wireless infrared communication IEEE TRANSACTIONS ON COMMUNICATIONS Carruthers, J. B., Kahn, J. M. 2000; 48 (6): 960-969
  • Capacity Scaling in Dual Antenna Array Wireless Systems Tse, D., Chuah, C., Kahn, J., M. 2000
  • Average power reduction techniques for multiple-subcarrier intensity-modulated optical signals ICC 2000: IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CONFERENCE RECORD, VOLS 1-3 You, R., Kahn, J. M. 2000: 1620-1627
  • Maximum-likelihood spatial-diversity reception on correlated turbulent free-space optical channels IEEE Global Telecommunications Conference (GLOBECOM 00) Zhu, X. M., Kahn, J. M. IEEE. 2000: 1237–1241
  • Maximum-Likelihood Spatial-Diversity Reception on Correlated Turbulent Free-Space Optical Channels Zhu, X., Kahn, J., M. 2000
  • Analysis of Infrared Wireless Links Employing Multi-Beam Transmitters and Imaging Diversity Receivers IEEE Trans. on Commun. Djahani, P., Kahn, J., M. 2000; 48 (12): 2077-2088
  • Capacity Growth of Multi-Ele-ment Arrays in Indoor and Outdoor Wireless Channels Chuah, C., Foschini, G., J., Valenzuela, R., A., Chizhik, D., Ling, J., Kahn, J., M. 2000
  • Angle Diversity for Nondirected Wireless Infrared Communication IEEE Trans. on Commun. Carruthers, J., B., Kahn, J., M. 2000; 48 (6): 960-969
  • Fading Correlation and its Effect on the Capacity of Multi-Ele-ment Antenna Systems IEEE Trans. on Commun. Shiu, D., Foschini, G., Gans, M., J., Kahn, J., M. 2000; 48: 502-513
  • Average Power Reduction Techniques for Multiple-Subcarrier Intensity-Modulated Opti-cal Signals You, R., Kahn, J., M. 2000
  • Emerging Challenges: Mobile Networking for ‘Smart Dust J. of Com-mun. and Networks Kahn, J., M., Katz, R., H., Pister, K., S.J. 2000; 2 (3): 188-196
  • Performance Analysis of Linear Binary Block-Coded Optical PPM CDMA Systems with Soft-Decision Decoding Ohtsuki, T., Kahn, J., M. 2000
  • Capacity Scaling in Dual Antenna Array Wireless Systems Tse, D., Chuah, C., Kahn, J., M. 2000
  • Turbo-Coded Optical PPM CDMA Systems Ohtsuki, T., Kahn, J., M. 2000
  • Transfer Function Bounds on Performance of Binary Turbo Coding Followed by M- ary Orthogonal Signal Mapping through Interleaver Ohtsuki, T., Kahn, J., M. 2000
  • BER Performance of Turbo-Coded PPM CDMA Systems on Optical Fiber J. Lightwave Technol. Ohtsuki, T., Kahn, J., M. 2000; 18 (12): 1776-1784
  • Performance of Turbo Codes with Two-Branch Diversity and Correlated Fading Ohtsuki, T., Kahn, J., M. 2000
  • Decision-feedback equalization of pulse-position modulation on measured nondirected indoor infrared channels ICC 96 Meeting Audeh, M. D., Kahn, J. M., Barry, J. R. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 1999: 500–503
  • Coding and equalization for PPM on wireless infrared channels IEEE TRANSACTIONS ON COMMUNICATIONS Lee, D. C., Kahn, J. M. 1999; 47 (2): 255-260
  • Differential Pulse-Position Modulation for Power-Efficient Optical Communication IEEE Trans. on Commun. Shiu, D., Kahn, J., M. 1999; 47 (8): 1201-1210
  • Analysis of infrared wireless links employing multi-beam transmitters and imaging diversity receivers IEEE Global Communications Conference (GLOBECOM 99) Djahani, P., Kahn, J. M. IEEE. 1999: 497–504
  • Effect of Non-Reciprocity on Infrared Wireless Local-Area Networks Chow, F., Kahn, J., M. 1999
  • Analysis of Infrared Wireless Links Employing Multi-Beam Transmitters and Imaging Diversity Receivers Djahani, P., Kahn, J., M. 1999
  • Transfer Function Bounds on Performance of Turbo Codes for M-ary Orthogonal Sig-nals Ohtsuki, T., Kahn, J., M. 1999
  • Effect of Non-Reciprocity on Infrared Wireless Local-Area Networks Chow, F., Kahn, J., M. 1999
  • Decision-Feedback Equalization of Pulse-Position Modulation on Measured Non-Directed Indoor Infrared Channels IEEE Trans. on Commun. Audeh, M., D., Kahn, J., M., Barry, J., R. 1999; 47: 500-503
  • Layered Space-Time Codes for Wireless Communications using Multiple Transmit Antennas Shiu, D., Kahn, J., M. 1999
  • Scalable Layered Space-Time Codes for Wireless Communications: Performance Analy-sis and Design Criteria Shiu, D., Kahn, J., M. 1999
  • Coding and Equalization for PPM on Wireless Infrared Channels IEEE Trans. on Commun. Lee, D., C., Kahn, J., M. 1999; 47 (2): 255-260
  • Average-Power Reduction Techniques for Multiple-Subcarrier Optical Intensity Modula-tion You, R., Kahn, J., M. 1999
  • Mobile Networking for ‘Smart Dust Kahn, J., M., Katz, R., H., Pister, K., S.J. 1999
  • Rate-Adaptive Modulation Techniques for Infrared Wireless Communications Diana, L., Kahn, J., M. 1999
  • Shaping and Non-Equiprobable Signaling for Intensity-Modulated Signals IEEE Trans. on Information Theory Shiu, D., Kahn, J., M. 1999; 45: 2661-2668
  • Imaging diversity receivers for high-speed infrared wireless communication IEEE COMMUNICATIONS MAGAZINE Kahn, J. M., You, R., Djahani, P., Weisbin, A. G., Teik, B. K., Tang, A. 1998; 36 (12): 88-94
  • Joint design of a channel-optimized quantizer and multicarrier modulation IEEE International Conference on Communications Ho, K. P., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 1998: 1254–57
  • Experimental 25-Mb/s Wireless Infrared Link Using 4-PPM with Scalar Decision- Feedback Equalization Lee, D., C., Kahn, J., M. 1998
  • Coding and equalization for PPM on wireless infrared channels IEEE Global Telecommunications Conference (GLOBECOM 98) Lee, D. C., Kahn, J. M. IEEE. 1998: 201–206
  • Differential Pulse-Position Modulation for Power-Efficient Optical Communication Shiu, D., Kahn, J., M. 1998
  • Coding and Equalization for PPM on Wireless Infrared Channels Lee, D., C., Kahn, J., M. 1998
  • Experimental 25-Mb/s wireless infrared link using 4-PPM with scalar decision-feedback equalization IEEE International Conference on Communications Lee, D. C., Kahn, J. M. IEEE. 1998: 26–30
  • Angle diversity for nondirected wireless infrared communication IEEE International Conference on Communications Carruthers, J. B., Kahn, J. M. IEEE. 1998: 1665–1670
  • Capacity of Multi-Antenna Array Systems in Indoor Wireless Environment Chuah, C., Tse, D., Kahn, J., M. 1998
  • Imaging Diversity Receivers for High- Speed Infrared Wireless Communications IEEE Communications Magazine Kahn, J., M., Djahani, P., Weisbin, A., G., Beh, K., T., Tang, A., P., You, R. 1998; 36 (12): 88-94
  • Joint Design of Channel-Optimized Quantizer and Multicarrier Modulation IEEE Trans. on Commun. Ho, K., P., Kahn, J., M. 1998; 46 (10): 1254-1257
  • Angle Diversity for Nondirected Wireless Infrared Communication Carruthers, J., B., Kahn, J., M. 1998
  • Shaping and Non-Equiprobable Signaling for Intensity-Modulated Signals Shiu, D., Kahn, J., M. 1998
  • Fading Correlation and its Effect on the Capacity of Multi-Ele-ment Antenna Systems Shiu, D., Foschini, G., Gans, M., J., Kahn, J., M. 1998
  • Channel reuse strategies for indoor infrared wireless communications IEEE TRANSACTIONS ON COMMUNICATIONS Marsh, G. W., Kahn, J. M. 1997; 45 (10): 1280-1290
  • Modeling of nondirected wireless infrared channels IEEE ICC 96 Meeting Carruthers, J. B., Kahn, J. M. IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 1997: 1260–68
  • Trellis-coded pulse-position modulation for indoor wireless infrared communications IEEE TRANSACTIONS ON COMMUNICATIONS Lee, D. C., Kahn, J. M., Audeh, M. D. 1997; 45 (9): 1080-1087
  • Wireless infrared communications PROCEEDINGS OF THE IEEE Kahn, J. M., Barry, J. R. 1997; 85 (2): 265-298
  • Channel Reuse Strategies for Indoor Infrared Wireless Communications IEEE Trans. on Commun. Marsh, G., W., Kahn, J., M. 1997; 45 (10): 1280-1290
  • Image transmission over noisy channels using multicarrier modulation SIGNAL PROCESSING-IMAGE COMMUNICATION Ho, K. P., Kahn, J. M. 1997; 9 (2): 159-169
  • Wireless Infrared Communications Kahn, J., M., Barry, J., R. 1997
  • Image Transmission Over Noisy Channels Using Multicarrier Modulation Signal Processing: Image Communication Ho, K., P., Kahn, J., M. 1997; 9 (2): 159-169
  • Infrared Wireless Communications: Recent Results DIMACS (Center for Discrete Mathematics and Theoretical Computer Science) Workshop on Network Switching, Princeton, NJ Kahn, J., M. 1997
  • Modeling of Nondirected Wireless Infrared Channels IEEE Trans. on Com-mun. Carruthers, J., B., Kahn, J., M. 1997; 45 (10): 1260-1268
  • Effect of electronic-ballast fluorescent lighting on wireless infrared links IEE PROCEEDINGS-OPTOELECTRONICS Narasimhan, R., Audeh, M. D., Kahn, J. M. 1996; 143 (6): 347-354
  • Optimal predistortion of gaussian inputs for clipping channels IEEE TRANSACTIONS ON COMMUNICATIONS Ho, K. P., Kahn, J. M. 1996; 44 (11): 1505-1513
  • Performance evaluation of experimental 50-Mb/s diffuse infrared wireless link using on-off keying with decision-feedback equalization IEEE TRANSACTIONS ON COMMUNICATIONS Marsh, G. W., Kahn, J. M. 1996; 44 (11): 1496-1504
  • Transmission of analog signals using multicarrier modulation: A combined source-channel coding approach IEEE TRANSACTIONS ON COMMUNICATIONS Ho, K. P., Kahn, J. M. 1996; 44 (11): 1432-1443
  • Performance of pulse-position modulation on measured non-directed indoor infrared channels IEEE TRANSACTIONS ON COMMUNICATIONS Audeh, M. D., Kahn, J. M., Barry, J. R. 1996; 44 (6): 654-659
  • Methods for crosstalk measurement and reduction in dense WDM systems JOURNAL OF LIGHTWAVE TECHNOLOGY Ho, K. P., Kahn, J. M. 1996; 14 (6): 1127-1135
  • Multiple-subcarrier modulation for nondirected wireless infrared communication IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS Carruthers, J. B., Kahn, J. M. 1996; 14 (3): 538-546
  • Effect of electronic-ballast fluorescent lighting on wireless infrared links 1996 IEEE International Conference on Communications - Converging Technologies for Tomorrows Applications (ICC 96) Narasimhan, R., Audeh, M. D., Kahn, J. M. IEEE. 1996: 1213–1219
  • Channel reuse strategies for indoor infrared wireless communications IEEE GLOBECOM 1996 - Communications: The Key to Global Prosperity Marsh, G. W., Kahn, J. M. IEEE. 1996: 1597–1602
  • Combined source-channel coding using channel-optimized quantizer and multicarrier modulation 1996 IEEE International Conference on Communications - Converging Technologies for Tomorrows Applications (ICC 96) Ho, K. P., Kahn, J. M. IEEE. 1996: 1323–1327
  • Modeling of nondirected wireless infrared channels 1996 IEEE International Conference on Communications - Converging Technologies for Tomorrows Applications (ICC 96) Carruthers, J. B., Kahn, J. M. IEEE. 1996: 1227–1231
  • Transmission of Analog Signals using Multicarrier Modulation: a Combined Source- Channel Coding Approach IEEE Trans. on Commun. Ho, K., P., Kahn, J., M. 1996; 44 (11): 1432-1443
  • Multiple-Subcarrier Modulation for Non-Directed Wireless Infrared Communi-cation IEEE J. Sel. Areas in Commun. Carruthers, J., B., Kahn, J., M. 1996; 14: 538-546
  • On models of clipping distortion for lightwave CATV systems IEEE PHOTONICS TECHNOLOGY LETTERS Ho, K. P., Kahn, J. M. 1996; 8 (1): 125-126
  • Wireless infrared communication links using multi-beam transmitters and imaging receivers 1996 IEEE International Conference on Communications - Converging Technologies for Tomorrows Applications (ICC 96) Tang, A. P., Kahn, J. M., Ho, K. P. IEEE. 1996: 180–186
  • Diffractive Spot-Array Generation Using Multimode Surface-Emitting Lasers and Light-Emitting Diodes Hoch, J., S., Grot, A., Kahn, J., M. 1996
  • Optimal Predistortion of Gaussian Inputs for Clipping Channels IEEE Trans. on Commun. Ho, K., P., Kahn, J., M. 1996; 44 (11): 1505-1513
  • On Models of Clipping Distortion for Lightwave CATV Systems IEEE Photon. Tech-nol. Lett. Ho, K., P., Kahn, J., M. 1996; 8 (1): 125-126
  • Performance Evaluation of Experimental 50-Mb/s Diffuse Infrared Wireless Link using On-Off Keying with Decision-Feedback Equalization IEEE Trans. on Commun. Marsh, G., W., Kahn, J., M. 1996; 44 (11): 1496- 1504
  • Combined Source-Channel Coding Using Channel-Optimized Quantizer and Multicar-rier Modulation Ho, K., P., Kahn, J., M. 1996
  • Channel Reuse Strategies for Indoor Infrared Wireless Communications Marsh, G., W., Kahn, J., M. 1996
  • Modeling of Non-Directed Wireless Infrared Channels Carruthers, J., B., Kahn, J., M. 1996
  • Trellis-coded pulse-position modulation for indoor wireless infrared communications 7th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 96) Lee, D. C., Kahn, J. M., Audeh, M. D. IEEE. 1996: 349–353
  • Wireless Infrared Communication Links using Multi-Beam Transmitters and Imaging Receivers Tang, A., P., Kahn, J., M., Ho, K., P. 1996
  • Decision-feedback equalization of pulse-position modulation on measured non-directed indoor infrared channels 1996 IEEE International Conference on Communications - Converging Technologies for Tomorrows Applications (ICC 96) Audeh, M. D., Kahn, J. M., Barry, J. R. IEEE. 1996: 1220–1226
  • Methods for Crosstalk Measurement and Reduction in Dense WDM Systems J. Lightwave Technol. Ho, K., P., Kahn, J., M. 1996; 14: 1127-1135
  • EXACT PROBABILITY-DENSITY FUNCTION FOR PHASE-MEASUREMENT INTERFEROMETRY JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION Ho, K. P., Kahn, J. M. 1995; 12 (9): 1984-1989
  • LINK DESIGN FOR NONDIRECTED WIRELESS INFRARED COMMUNICATIONS APPLIED OPTICS Barry, J. R., Kahn, J. M. 1995; 34 (19): 3764-3776

    Abstract

    We optimize the design of a short-range communication system using nondirected line-of-sight IR radiation. We propose a receiver structure comprising a spherical thin-film optical filter and a truncated spherical lens that can significantly outperform an optimized planar-filter system. We can make the passband of the spherical filter arbitrarily narrow without constraining the field of view by using an arbitrarily large filter radius. We argue that a truncation angle of 90° maximizes the receiver field of view when a spherical filter is used. We jointly optimize the transmitter radiation pattern and receiver optical components. Numerical results show that 269 mW of transmitted signal power is sufficient to achieve 100 Mbit/s throughout a 4-m-radius cell with high background irradiance.

    View details for Web of Science ID A1995RE61500028

    View details for PubMedID 21052199

  • PERFORMANCE EVALUATION OF BASEBAND OOK FOR WIRELESS INDOOR INFRARED LANS OPERATING AT 100 MB/S IEEE TRANSACTIONS ON COMMUNICATIONS Audeh, M. D., Kahn, J. M. 1995; 43 (6): 2085-2094
  • COMPOUND PARABOLIC CONCENTRATORS FOR NARROW-BAND WIRELESS INFRARED RECEIVERS OPTICAL ENGINEERING Ho, K. P., Kahn, J. M. 1995; 34 (5): 1385-1395
  • EXPERIMENTAL CHARACTERIZATION OF NON-DIRECTED INDOOR INFRARED CHANNELS IEEE TRANSACTIONS ON COMMUNICATIONS Kahn, J. M., Krause, W. J., Carruthers, J. B. 1995; 43 (2-4): 1613-1623
  • Performance of PPM with maximum-likelihood sequence detection on measured non-directed indoor infrared channels 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization Audeh, M. D., Kahn, J. M., Barry, J. R. IEEE. 1995: 1177–1181
  • Crosstalk measurement and reduction in dense WDM systems using subcarrier tone channel identification and linear cancellation 1995 IEEE International Conference on Communications - Communications: Gateway to Globalization Ho, K. P., Kahn, J. M. IEEE. 1995: 287–291
  • Exact Probability Density Function for Phase-Measurement Interferometry J. Opt. Soc. Am. A Ho, K., P., Kahn, J., M. 1995; 12 (9): 1984-1989
  • Transmission of DCT-Coded Images by Multicarrier Modulation for Noisy Channels Ho, K., P., Kahn, J., M. 1995
  • Crosstalk Measurement and Reduction in Dense WDM Systems Using Subcarrier Tone Channel Identification and Linear Cancellation Ho, K., P., Kahn, J., M. 1995
  • Performance of pulse-position modulation with trellis-coded modulation on non-directed indoor infrared channels IEEE Global Telecommunications Conference Lee, D. C., Audeh, M. D., Kahn, J. M. IEEE. 1995: 1830–1834
  • Crosstalk Cancellation in Dense WDM Systems Using Filter-Bank Receiver Tech. Digest of Optical Fiber Commun. Conf. Ho, K., P., Kahn, J., M. 1995: 35-36
  • Link Design for Non-Directed Wireless Infrared Communications Applied Optics Barry, J., R., Kahn, J., M. 1995; 34 (19): 3764-3776
  • Performance Evaluation of Experimental 50-Mb/s Diffuse Infrared Wireless Link using On-Off Keying with Decision-Feedback Equalization Marsh, G., W., Kahn, J., M. 1995
  • Performance of L-Pulse-Position Modulation with Trellis-Coded Modula-tion on Non-Directed Indoor Infrared Channels Lee, D., C., Audeh, M., D., Kahn, J., M. 1995
  • Experimental Characterization of Non-Directed Indoor Infrared Channels IEEE Trans. on Commun Kahn, J., M., Krause, W., J., Carruthers, J., B. 1995; 43: 1613-1623
  • Compound Parabolic Concentrators for Narrow-Band Wireless Infrared Receivers Optical Engineering Ho, K., P., Kahn, J., M. 1995; 34 (5): 1385-1395
  • High-Speed Wireless Infrared Communications presented at 19th IEEE Computer Elements Work-shop, Vail, CO Kahn, J., M. 1995
  • Combined Source-Channel Coding Using Multicarrier Modulation Ho, K., P., Kahn, J., M. 1995
  • PERFORMANCE EVALUATION OF L-PULSE-POSITION MODULATION ON NON-DIRECTED INDOOR INFRARED CHANNELS 1994 IEEE International Conference on Communications (SUPERCOMM/ICC 94): Serving Humanity Through Communications Audeh, M. D., Kahn, J. M. IEEE. 1994: 660–664
  • 50-MB/S DIFFUSE INFRARED FREE-SPACE LINK USING ON-OFF KEYING WITH DECISION-FEEDBACK EQUALIZATION 28th Asilomar Conference on Signals, Systems and Computers Marsh, G. W., Kahn, J. M. IEEE COMPUTER SOC. 1994: 74–77
  • MUTLIPLE-SUBCARRIER MODULATION FOR NON-DIRECTED WIRELESS INFRARED COMMUNICATION 1994 IEEE GLOBECOM - Communications, the Global Bridge Carruthers, J. B., Kahn, J. M. IEEE. 1994: 1055–1059
  • Channel Compression in Subcarrier-Multiplexed Lightwave Systems Ho, K., P., Kahn, J., M. 1994
  • 50-MB/S DIFFUSE INFRARED FREE-SPACE LINK USING ON-OFF KEYING WITH DECISION-FEEDBACK EQUALIZATION 5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 94) Marsh, G. W., Kahn, J. M. I O S PRESS. 1994: 1086–1089
  • Non-Directed Infrared Links for High-Capacity Wireless LANs IEEE Pers. Commun. Mag. Kahn, J., M., Barry, J., R., Audeh, M., D., Carruthers, J., B., Krause, W., J. 1994; 1 (2): 12-25
  • 50-Mb/s Diffuse Infrared Free-Space Link Using On-Off Keying with Decision Feedback Equalization IEEE Photon. Technol. Lett. Marsh, G., W., Kahn, J., M. 1994; 6 (10): 1268-1270
  • Design of Non-Directed Infrared Links for High-Speed Wireless Networks Barry, J., R., Kahn, J., M. 1994
  • Multiple-Subcarrier Modulation for Non-Directed Wireless Infrared Communi-cation Carruthers, J., B., Kahn, J., M. 1994
  • 50-Mb/s Diffuse Infrared Free-Space Link Using On-Off Keying with Decision Feedback Equalization Marsh, G., W., Kahn, J., M. 1994
  • 50-Mb/s Diffuse Infrared Free-Space Link Using On-Off Keying with Decision Feedback Equalization Marsh, G., W., Kahn, J., M. 1994
  • EQUALIZATION TECHNIQUE TO REDUCE CLIPPING-INDUCED NONLINEAR DISTORTION IN SUBCARRIER-MULTIPLEXED LIGHTWAVE SYSTEMS IEEE PHOTONICS TECHNOLOGY LETTERS Ho, K. P., Kahn, J. M. 1993; 5 (9): 1100-1103
  • EXTERNAL OPTICAL FEEDBACK EFFECTS ON INTENSITY NOISE OF VERTICAL-CAVITY SURFACE-EMITTING LASERS IEEE PHOTONICS TECHNOLOGY LETTERS Ho, K. P., Walker, J. D., Kahn, J. M. 1993; 5 (8): 892-895
  • OPTICAL FREQUENCY COMB GENERATOR USING PHASE MODULATION IN AMPLIFIED CIRCULATING LOOP IEEE PHOTONICS TECHNOLOGY LETTERS Ho, K. P., Kahn, J. M. 1993; 5 (6): 721-725
  • SIMULATION OF MULTIPATH IMPULSE-RESPONSE FOR INDOOR WIRELESS OPTICAL CHANNELS IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS Barry, J. R., Kahn, J. M., Krause, W. J., Lee, E. A., Messerschmitt, D. G. 1993; 11 (3): 367-379
  • DESIGN OF HIGH-SPEED WIRELESS LINKS USING NON-DIRECTIONAL INFRARED RADIATION 3RD WORKSHOP ON THIRD GENERATION WIRELESS INFORMATION NETWORKS Kahn, J. M., Barry, J. R., Audeh, M. D., Lee, E. A., Messerschmitt, D. G. KLUWER ACADEMIC PUBLISHERS. 1993: 109–126
  • REDUCTION OF FEEDBACK-INDUCED INTENSITY NOISE IN VERTICAL-CAVITY SURFACE-EMITTING LASER BY SUPERPOSITION OF HIGH-FREQUENCY CURRENT 6th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 93) Ho, K. P., Walker, J. D., Kahn, J. M. IEEE. 1993: 554–555
  • Reduction of Feedback-Induced Intensity Noise in Vertical-Cavity Sur-face-Emitting Laser by Superposition of High-Frequency Current Ho, K., P., Walker, J., D., Kahn, J., M. 1993
  • Optical Frequency Comb Generator Using Phase Modulation in Amplified Circulating Loop IEEE Photon. Technol. Lett. Ho, K., P., Kahn, J., M. 1993; 5 (6): 721-725
  • Equalization Technique to Reduce Laser Clipping-Induced Distortion in Subcarrier-Multiplexed Lightwave Systems IEEE Photon. Technol. Lett. Ho, K., P., Kahn, J., M. 1993; 5 (9): 1100-1103
  • External Optical Feedback Effects on Intensity Noise of Vertical-Cavity Surface-Emitting Lasers IEEE Photon. Technol. Lett. Ho, K., P., Walker, J., D., Kahn, J., M. 1993; 5 (8): 892-895
  • Stabilization of Millimeter- Wave Frequencies from Passively Mode-Locked Semiconductor Lasers Using an Opto-Electronic Phase-Locked Loop IEEE Photon. Technol. Lett. Buckman, L., A., Georges, J., B., Park, J., Vassilovski, D., Kahn, J., M., Lau, K., Y. 1993; 5 (10): 1137-1140
  • Experimental Characterization of Multipath Free-Space Infrared Channels for Wireless In-Building Networks Tech. Digest of 19th Euro. Conf. on Opt. Commun. Kahn, J., M., Krause, W., J. 1993: 397-400
  • Heterodyne Detection of 310-Mb/s Quadriphase-Shift Keying Using Fourth-Power Optical Phase-Locked Loop Tech. Digest of Optical Fiber Commun. Conf. Porter, A., M., Kahn, J., M., Padan, U. 1993
  • Simulation Tools for Free-Space Optical Interconnects Based on Computer-Generated Holograms Kahn, J., M., Hoch, J., S. 1993
  • Simulation of Multipath Impulse Response for Wireless Optical Channels IEEE J. Sel. Areas in Commun. Barry, J., R., Kahn, J., M., Krause, W., J., Lee, E., A. 1993; 11 (3): 367-379
  • CARRIER SYNCHRONIZATION FOR HOMODYNE AND HETERODYNE-DETECTION OF OPTICAL QUADRIPHASE-SHIFT KEYING JOURNAL OF LIGHTWAVE TECHNOLOGY Barry, J. R., Kahn, J. M. 1992; 10 (12): 1939-1951
  • Carrier Synchronization for Homodyne and Heterodyne Detection of Optical Quad-riphase-Shift Keying J. Lightwave Technol. Barry, J., R., Kahn, J., M. 1992; 10: 1939-1951
  • HIGH-SPEED NON-DIRECTIONAL INFRARED COMMUNICATION FOR WIRELESS LOCAL-AREA NETWORKS 26TH ASILOMAR CONF ON SIGNALS, SYSTEMS AND COMPUTERS Kahn, J. M., Barry, J. R., Krause, W. J., Audeh, M. D., Carruthers, J. B., Marsh, G. W., Lee, E. A., Messerschmitt, D. G. I E E E, COMPUTER SOC PRESS. 1992: 83–87
  • Fourth-Power Phased-Locked Loop for Heterodyne Detection of Optical Quadrature Phase-Shift Keying Tech. Digest of Optical Fiber Commun. Conf. Barry, J., R., Audeh, M., D., Porter, A., M. 1992: 292
  • Wireless Communications: Future Directions Design of High-Speed Wireless Links Using Non-Directional Infrared Radiation Kahn, J., M., Barry, J., R., Audeh, M., D., Lee, E., A., Messerschmitt, D., G. Kluwer Academic. 1992: 109–126
  • Heterodyne Detection of 310-Mb/s Quadriphase-Shift Keying Using Fourth-Power Optical Phase-Locked Loop IEEE Photon. Technol. Lett. Kahn, J., M., Porter, A., M., Padan, U. 1992; 4: 1397-1400
  • Free-Space Infrared Communication for Wireless Indoor Networks Kahn, J., M. 1992
  • Design of High-Speed Wireless Links Using Non-Directional Infrared Radiation Kahn, J., M., Barry, J., R., Audeh, M., D., Lee, E., A., Messerschmitt, D., G. 1992
  • Performance Simulation of Baseband OOK Modulation for Wireless Infrared LANs at 100 Mb/s Audeh, M., D., Kahn, J., M. 1992
  • Free-Space Infrared Communication for Wireless Indoor Networks Kahn, J., M. 1992
  • High-Speed Nondirective Optical Communication for Wireless Networks IEEE Network Magazine Barry, J., R., Kahn, J., M., Lee, E., A. 1991: 44-54
  • Modeling of Indoor Free-Space Infrared Propaga-tion Barry, J., R., Kahn, J., M., Lee, E., A., Messerschmitt, D., G. 1991
  • Polarization Effects on Ultra-Long Distance Signal Transmission in Amplified Optical-Fiber Loops IEEE Photon. Technol. Lett. Giles, C., R., Kahn, J., M., Korotky, S., K., Veselka, J., J., Burrus, C., A., Perino, J., S. 1991; 3: 948-951
  • Polarization Effects on Ultra-Long Distance Signal Transmission in Amplified Optical-Fiber Loops Tech. Digest of 17th Euro. Conf. on Opt. Commun. Giles, C., R., Kahn, J., M., Korotky, S., K., Veselka, J., J., Burrus, C., A., Perino, J., S. 1991: 385-388
  • 4 Gbit/s PSK Homodyne Transmission System Using Phase-Locked Semiconductor Lasers ech. Digest of Postdeadline Papers, Optical Fiber Com-mun. Conf. Kahn, J., M., Gnauck, A., H., Veselka, J., J., Korotky, S., K., Kasper, B., L. 1990: PD10/1-PD10/4
  • Homodyne Detection of Phase-Shift-Keying for Multi-Gigabit Lightwave Transmission Tech. Digest of Optical Fiber Commun. Conf. Kahn, J., M. 1990: 211
  • 4 Gbit/s Heterodyne Transmission Experiments Using ASK, FSK, and DPSK Modulation IEEE Photon. Technol. Lett. Gnauck, A., H., Reichmann, K., C., Kahn, J., M., Korotky, S., K., Veselka, J., J., Koch, T., L. 1990; 2: 908-910
  • 4 Gbit/s PSK Homodyne Transmission System Using Phase-Locked Semiconductor Lasers IEEE Photon. Technol. Lett. Kahn, J., M., Gnauck, A., H., Veselka, J., J., Korotky, S., K., Kasper, B., L. 1990; 2: 285-287
  • BPSK Homodyne Detection Experiment Using Balanced Optical Phase-Locked Loop with Quantized Feedback IEEE Photon. Technol. Lett. Kahn, J., M. 1990; 2: 840-843
  • BPSK Homodyne Detection Experiment Using Balanced Optical Phase-Locked Loop with Quantized Feedback Tech. Digest of Postdeadline Papers, 16th Euro. Conf. on Opt. Commun. Kahn, J., M. 1990: 991-994
  • 1 Gbit/s PSK Homodyne Transmission System Using Phase-Locked Semiconductor Lasers IEEE Photon. Technol. Lett. Kahn, J., M. 1989; 1: 340-342
  • PSK Homodyne Lightwave Transmission Using Semiconductor Lasers Tech. Digest of 15th Euro. Conf. on Opt. Commun. Kahn, J., M., Kasper, B., L. 1989
  • Optical Phaselock Receiver with Multi-Gigahertz Signal Bandwidth Electron. Lett. Kahn, J., M., Kasper, B., L., Pollock, K., J. 1989; 25: 626-627
  • Optical Phaselock Receiver with Multigigahertz Signal Bandwidth Tech. Digest of Seventh Intl. Conf. on Integ. Optics and Opt. Fiber Commun. Kahn, J., M., Kasper, B., L., Pollock, K., J. 1989
  • High-Stability 1.5 μm External-Cavity Lasers for Phase-Lock Applica-tions IEEE Photon. Technol. Lett. Kahn, J., M., Burrus, C., A., Raybon, G. 1989; 1: 159-161
  • 1 Gbit/s Integrate-and-Dump Filter for Digital Communication Systems Electron. Lett. Giles, C., R., Kahn, J., M. 1989; 25: 212-214
  • 1 Gbit/s Zero-IF DPSK Coherent Optical System Using a Single Photodetector Tech. Digest of Optical Fiber Commun. Conf. Kahn, J., M., Habbab, I., M. I., Giles, C., R. 1989: 72
  • 1 Gbit/s Zero-IF DPSK Coherent Optical System Using a Single Photodetector Electron. Lett. Kahn, J., M., Habbab, I., M. I., Giles, C., R. 1988; 24: 1455-1456
  • Phase-Insensitive Zero-IF Coherent Optical System Using Phase Switching Electron. Lett. Habbab, I., M. I., Kahn, J., M., Greenstein, L., J. 1988; 24: 974-975
  • Trigonal Hydrogen-Related Acceptor Complexes in Germanium Phys. Rev. B Kahn, J., M., McMurray Jr., R., E., Haller, E., E., Falicov, L., M. 1987; 36: 8001-8014
  • Hydrogen-Related Complexes in Silicon and Germanium: Static or Dynamic Defects? Gordon Res. Conf. on Point Defects, Line Defects and Interfaces in Semicond., Plymouth, NH Kahn, J., M. 1987
  • Beryllium-Hydrogen and Zinc-Hydrogen Shal-low Acceptor Complexes in Germanium Solid State Commun. McMurray Jr., R., E. 1987; 61: 27-32
  • Trigonal Hydrogen-Related Acceptor Complexes in Germanium Bull. Am. Phys. Soc. Ser. II Kahn, J., M., McMurray, R., E., Haller, E., E., Falicov, L., M. 1987; 32: 841
  • Copper-Dihydrogen Complex Shallow Acceptors in High-Purity Ger-manium Bull. Am. Phys. Soc. Ser. II Kahn, J., M., Haller, E., E., Falicov, L., M. 1986; 31: 695
  • Isotope-Induced Symmetry Change in Dynamic Semiconductor Defects Phys. Rev. Lett. Kahn, J., M., Falicov, L., M., Haller, E., E. 1986; 57: 2077-2080
  • Copper-Dihydrogen Acceptors in High-Purity Germanium Kahn, J., M., Haller, E., E., Falicov, L., M. 1986
  • A Shallow Hydrogen-Zinc Acceptor in Germa-nium Solid State Commun. McMurray Jr., R., E., Haegel, N., M., Kahn, J., M., Haller, E., E. 1985; 53: 1137
  • Low Temperature Atomic Hydrogen Diffusivity in Si and Ge Bull. Am. Phys. Soc. Ser. II Kahn, J., M., Pearton, S., J., Haller, E., E. 1984; 29: 208
  • Hydrogenation of Gold-Related Levels in Silicon by Electrolytic Doping J. Appl. Phys. Pearton, S., J., Hansen, W., L., Haller, E., E., Kahn, J., M. 1984; 55: 1221-1223
  • The Nature of the Dominant Gamma-Induced Defects in High-Purity Germanium Rad. Effects Pearton, S., J., Tavendale, A., J., Kahn, J., M., Haller, E., E. 1984; 81: 293-308
  • Deep Level Impurities in Germanium and Silicon: Low Temperature Passivation or Removal Techniques IEEE Trans. Nucl. Sci. Pearton, S., J., Tavendale, A., J., Kahn, J., M., Haller, E., E. 1984; NS-31: 326-330
  • A Shallow Hydrogen-Zinc Acceptor in Germa-nium, McMurray Jr., R., E., Haegel, N., M., Kahn, J., M., Haller, E., E. 1984
  • Deuterium in Germanium: Interaction with Point Defects J. Appl. Phys. Pearton, S., J., Kahn, J., M., Hansen, W., L., Haller, E., E. 1984; 55: 1464-1471
  • Quenched-In Deep Acceptors in Germanium J. Phys. C Pearton, S., J., Haller, E., E., Kahn, J., M. 1984; 17: 2375-2379
  • Deep Level Effects in Silicon and Germanium after Plasma Hydrogenation J. Electron. Matls. Pearton, S., J., Kahn, J., M., Haller, E., E. 1983; 12: 1003-1014
  • Dislocations in Germanium: Effects of Plasma Hydrogenation Phys. Stat. Solidi A Pearton, S., J., Kahn, J., M. 1983; 78: K65-K69
  • MIMO Signal Processing for Mode-Division Multiplexing IEEE Signal Processing Magazine (Invited Paper). Arık, S., Ö., Kahn, J., M., Ho, K., P.
  • Linear Propagation Effects in Mode-Division Multiplexing Systems J. of Lightwave Technol. (Invited Paper). Ho, K., P., Kahn, J., M.
  • Coded Modulation for Fiber-Optic Networks IEEE Signal Processing Magazine. Beygi, L., Agrell, E., Kahn, J., M.