云雾后向散射激光回波特性研究  

Research on the characteristics of fog backscattering laser echo

作　　者：王凤杰[1] 陈慧敏[1] 马超[1] 龙胤宇 Wang Fengjie;Chen Huimin;Ma Chao;Long Yinyu(Science a n d T e c h n o l o g y o n Electromechanical Dynamic Control Laboratory,Beijing Institute of Technology , Beijing 100081 , China)

机构地区：[1]北京理工大学机电动态控制重点实验室,北京100081

出　　处：《红外与激光工程》2018年第5期94-98,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金(U1630131);上海航天科技创新基金(sast2017-074)

摘　　要：气溶胶后向散射激光回波在气溶胶内部的散射特性对其波形特征有着重要影响。为获取气溶胶后向散射激光回波的散射特性,文中以云雾为研究对象,建立激光云雾传输模型,仿真云雾后向散射激光回波在云雾内部的多次散射过程,统计不同云雾质量浓度和云雾距离条件下的激光回波的散射次数和传输时间,得到激光回波的散射次数范围和同次散射回波特征,以及云雾质量浓度和云雾距离对散射次数的影响规律。文中研究结果可为分析气溶胶后向散射激光回波特征提供重要支撑。The scattering characteristics of aerosol backscattering laser echo in aerosol has important influence on the waveform characteristics. In order to obtain the scattering characteristics of aerosol backscattering laser echo, we took fog as the research subject, and simulated the multiple scattering process of backscattering signal in fog by using the model of laser propagation in fog, and calculated the scattering times and propagation time under different fog mass concentrations and fog distances, and analyzed the range of scattering times, the features of same-scattering times echo, and the influence of fog mass concentration and fog distance on the scattering times. The results of this paper can provide an important support for the analysis of the characteristics of aerosol backscattering laser echo.

关 键 词：气溶胶 云雾 后向散射激光回波 MONTE Carlo 散射次数 

分 类 号：TN249[电子电信—物理电子学]