Fiber Optics and Optical Communication

Use of a partially coherent transmitter beam to improve the statistics of received power in a free-space optical communication system: theory and experimental results

[+] Author Affiliations
Kyle Drexler, Michael Roggemann

Michigan Technological University, Electrical Engineering Department, Houghton, Michigan, 49931-1295

David Voelz

New Mexico State University, Klipsch School of Electrical and Computer Engineering, Las Cruces, New Mexico 88003-8001

Opt. Eng. 50(2), 025002 (February 03, 2011). doi:10.1117/1.3533737
History: Received July 14, 2010; Accepted December 14, 2010; Revised December 13, 2010; Published February 03, 2011; Online February 03, 2011
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Controlling the spatial coherence of the transmitted beam has been suggested as a means of improving the statistics of the received power in long-range free-space optical communications systems. We present an experiment demonstrating the concept of transmitting a partially spatial coherent beam through a turbulent path in a lab setting to overcome long-term dropouts in the received power. It is demonstrated both theoretically and experimentally that using a partially spatial coherent beam can decrease the scintillation index by ∼ 50% and the mean intensity in the simulation by ∼ 90% regardless of turbulence strength, when compared to the intensity of a fully coherent source in turbulence.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Kyle Drexler ; Michael Roggemann and David Voelz
"Use of a partially coherent transmitter beam to improve the statistics of received power in a free-space optical communication system: theory and experimental results", Opt. Eng. 50(2), 025002 (February 03, 2011). ; http://dx.doi.org/10.1117/1.3533737


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