Journal
APPLIED OPTICS
Volume 54, Issue 9, Pages 2318-2325Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.54.002318
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In practice, due to the laser device and the inevitable error of the processing technique, the laser source emitted from the communication terminal is partially coherent, and is represented as a Gaussian Schell model (GSM). The cross-spectral density function based on the Gaussian model in previous research is replaced by the GSM. Thus the fiber-coupling efficiency equation of the GSM laser source through atmospheric turbulence is deduced. The GSM equation presents the effect of the source coherent parameter zeta on the fiber-coupling efficiency, which was not included previously. The effects of the source coherent parameter zeta on the spatial coherent radius and the fiber-coupling efficiency through atmospheric turbulence are numerically simulated and analyzed. The result manifests that the fiber-coupling efficiency invariably degrades with increasing zeta. The work in this paper is aimed to improve the redundancy design of fiber-coupling receiver systems by analyzing the fiber-coupling efficiency with the source coherent parameters. (c) 2015 Optical Society of America
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