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Optical Engineering

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
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Paper Abstract

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.

Paper Details

PDF: 7 pages
Opt. Eng. 50(2) 025002 doi: 10.1117/1.3533737
Published in: Optical Engineering Volume 50, Issue 2, February 2011
Show Author Affiliations
Kyle R. Drexler, Trex Enterprises Corp. (United States)
Michael C. Roggemann, Michigan Technological Univ. (United States)
David G. Voelz, New Mexico State Univ. (United States)

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