大气湍流引起激光外差探测空间相干性退化研究  

The Research for the Deterioration of Spatial Coherence of Laser Heterodyne Detection Caused by Atmospheric Turbulence

作　　者：徐静[1] 毛红敏[1] 甄胜来[1] 李成[1] 俞本立[1] 

机构地区：[1]安徽大学光电信息获取与控制教育部重点实验室,安徽合肥230039

出　　处：《激光与红外》2007年第12期1245-1249,共5页Laser & Infrared

基　　金：安徽省优秀青年科技基金资助项目(04042045);安徽省高校青年教师科研"资助计划"基金资助项目(2005jq1027)

摘　　要：文章简要介绍了随机大气湍流效应及其对1.55μm激光外差探测系统的影响,并在理论分析的基础上设计了实验研究方案。通过测试外差探测效率与信噪比随大气湍流强度而变的实验,着重研究大气湍流效应引起空间相干性的退化。The random atmospheric turbulence effect and the influence on the 1.55 μm laser heterodyne detection system are introduced. Based on analysis in theory, the experiment research and result are given at the same time. By testing the change of heterodyne detection efficiency and signal-to-noise ratio due to the atmospheric turbulence intensity, we are more concern about the deterioration of spatial coherence caused by atmospheric turbulence effect.

关 键 词：大气湍流 外差探测 探测效率 信噪比 空间相干性 

分 类 号：TN929.1[电子电信—通信与信息系统]