Heterodyne efficiency of a coherent free-space optical communication   model through atmospheric turbulence

doi:10.1364/AO.51.007246

CORC > 北京大学 > 信息科学技术学院

	Heterodyne efficiency of a coherent free-space optical communication model through atmospheric turbulence
	Ren, Yongxiong ; Dang, Anhong ; Liu, Ling ; Guo, Hong
刊名	applied optics
	2012
关键词	TO-NOISE RATIO LIDAR PERFORMANCE SIGNAL BEAM
DOI	10.1364/AO.51.007246
英文摘要	The heterodyne efficiency of a coherent free-space optical (FSO) communication model under the effects of atmospheric turbulence and misalignment is studied in this paper. To be more general, both the transmitted beam and local oscillator beam are assumed to be partially coherent based on the Gaussian Schell model (GSM). By using the derived analytical form of the cross-spectral function of a GSM beam propagating through atmospheric turbulence, a closed-form expression of heterodyne efficiency is derived, assuming that the propagation directions for the transmitted and local oscillator beams are slightly different. Then the impacts of atmospheric turbulence, configuration of the two beams (namely, beam radius and spatial coherence width), detector radius, and misalignment angle over heterodyne efficiency are examined. Numerical results suggest that the beam radius of the two overlapping beams can be optimized to achieve a maximum heterodyne efficiency according to the turbulence conditions and the detector radius. It is also found that atmospheric turbulence conditions will significantly degrade the efficiency of heterodyne detection, and compared to fully coherent beams, partially coherent beams are less sensitive to the changes in turbulence conditions and more robust against misalignment at the receiver. (C) 2012 Optical Society of America; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000310430900016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Optics; SCI(E); EI; PubMed; 3; ARTICLE; 30; 7246-7254; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/343284]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Ren, Yongxiong,Dang, Anhong,Liu, Ling,et al. Heterodyne efficiency of a coherent free-space optical communication model through atmospheric turbulence[J]. applied optics,2012.
APA	Ren, Yongxiong,Dang, Anhong,Liu, Ling,&Guo, Hong.(2012).Heterodyne efficiency of a coherent free-space optical communication model through atmospheric turbulence.applied optics.
MLA	Ren, Yongxiong,et al."Heterodyne efficiency of a coherent free-space optical communication model through atmospheric turbulence".applied optics (2012).