title: Fiber-coupling efficiency of Gaussian Schell model for optical communication through atmospheric turbulence.
abstract: 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 ζ on the fiber-coupling efficiency, which was not included previously. The effects of the source coherent parameter ζ 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 ζ. 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.
authors.forename: Liying
authors.initials: L
authors.lastname: Tan
authors.forename: Mengnan
authors.initials: M
authors.lastname: Li
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Ma