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9 December 2002 Aperture averaging in a free-space laser communication system with a phase diffuser
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Abstract
The effects of aperture averagign in a free-space laser communication system with a phase diffuser placed in front of the transmitting aperture are studied. The partially coherent beam created by the use of a phase diffuser is modeled as a Gaussian Schell beam. To evaluate aperture averaging, an analytic expression is used for the spatial covariance of irradiance fluctuations that is valid for Gaussian beams of any degree of coherence, subject to the restriction that the atmospheic turbulence-corrupted laser beam can be described as a Gaussian stochastic process. In the weak fluctuation regime this analytic expression is found to compare reasonably well with published data. It is shown that when a partially coherent source beam is used irradiance fluctuations can be significantly reduced in the weak fluctuation regime.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jennifer C. Ricklin and Frederic M. Davidson "Aperture averaging in a free-space laser communication system with a phase diffuser", Proc. SPIE 4821, Free-Space Laser Communication and Laser Imaging II, (9 December 2002); https://doi.org/10.1117/12.453532
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