大气后向散射对主动探测激光脉冲的影响  

Study on the influence of atmosphere back-scattering on laser pulse

作　　者：杨雨川[1] 龙超[1] 谭碧涛[1] 袁尧臣[1] 林芳华[1] 陈力子[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《激光与红外》2013年第5期482-485,共4页Laser & Infrared

基　　金：国家高技术发展计划项目资助

摘　　要：分析了大气散射模型导致的后向散射对激光脉冲的影响,建立了激光脉冲后向散射物理模型,可用于估算后向散射产生干扰脉冲的功率。利用雪崩二极管探测器(APD)对实际大气条件下大气后向散射对探测激光脉冲产生的干扰脉冲进行了测量,结合测量结果和模型计算结果得到气溶胶和分子散射综合相函数值,与实测后向散射相函数值具有较好的一致性,对设计激光主动探测系统具有实际应用价值。The effect of the atmospheric back-scattering is analyzed. The physical model of laser pulse＇s back-scattering is built, which can be used to evaluate the back-scattering power. Under practical atmospheric condition, the avalanche diode is used to measure the interferential pulse caused by back-scattering. The aerosol and molecular scattering integrated phase function value is compared with the measured phase function value. The results have good consistency. The study is valuable for designing laser active detecting system.

关 键 词：后向散射 激光脉冲 米散射 瑞利散射 

分 类 号：TN958.98[电子电信—信号与信息处理]