Results 291 to 300 of about 307,428 (330)

Coherent optical fiber communications system using all-optical correlation processing

Optics Letters, 1990
We propose a point-to-point or single-ended communications technique based on single-mode optical fibers that uses all-optical pulse multiplexing at the transmitter and coherent optical correlation at the receiver. This technique shows potential for application to secure untappable communications, fiber local-area networks, and optical ranging in the ...
D D, Sampson, D A, Jackson
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Electro-optic resonant modulator for coherent optical communication

SPIE Proceedings, 1991
A resonant cavity electro-optic phase modulator has been designed and implemented to operate at a data rate of 10 Mbps. The modulator consists of an electro-optic crystal located in a highly resonant cavity. The cavity is electro-optically switched on and off resonance, and the phase dispersion near the cavity resonance provides the output phase ...
Deborah L. Robinson, Chien-Chung Chen, Hamid Hemmati   +2 more
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Multichannel coherent optical communications systems

Journal of Lightwave Technology, 1987
Balanced coherent receivers perform substantially better than single-detector receivers in multichannel optical fiber FDM communications systems since the balanced approach eliminates the direct-detection and signal-cross-signal interference. The permissible channel spacing D depends on the intermediate frequency f IF , on the bit rate R b , and on the
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Coherent Optical Free-Space Communications

Optical Amplifiers and Their Applications/Coherent Optical Technologies and Applications, 2006
The performance of coherent FSO systems operating within atmospheric are limited by turbulence. The performance statistics are computed from models for the induce index fluctuations, the second order Rytov perturbation method of solution to the stochastic wave equation and an extended form of the Huygens-Fresnel.
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Dual-Frequency Modulation for Coherent Optical Communication

Journal of Optical Communications, 1986
A new principle of dual-frequency modulation coherent optical communication is proposed; it has been tested.
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Optical Sources for Coherent Optical Fiber Communication Systems

SPIE Proceedings, 1985
Bell Communications Research, Inc., Crawfords Corner Road, Holmdel, New Jersey 07733AbstractThis paper reports recent progress in the development of three categories of optical sources with linewidths, Av, sufficiently narrow to be used in heterodyne and homodyne optical fiber communication systems: First, single-longitudinal-mode semiconductor lasers ...
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Enhancing Performance of Coherent Optical OFDM FSO Communication Link Using Cascaded EDFA

Wireless personal communications, 2021
Suresh Kumar, Payal
semanticscholar   +1 more source

Coherent optical communications systems

2008 Digest of the IEEE/LEOS Summer Topical Meetings, 2008
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Electronic States Modulation by Coherent Optical Phonons in 2D Halide Perovskites

Advanced Materials, 2021
Jianhui Fu, Mingjie Li, Ankur Solanki
exaly  

Performance improvement of 64-QAM coherent optical communication system by optimizing symbol decision boundary based on support vector machine

, 2018
Wei Chen, Junfeng Zhang, M. Gao, G. Shen
semanticscholar   +1 more source