激光雷达湍流大气探测  

A New Method for Atmosphere Turbulence Detection by Lidar

作　　者：陈冬[1] 王江安[1] 王乐东[1] 

机构地区：[1]海军工程大学电子工程学院光电研究所,湖北武汉430033

出　　处：《光学与光电技术》2012年第1期63-66,共4页Optics & Optoelectronic Technology

基　　金：国家高技术发展计划项目;海军装备预先研究(401060702)资助项目

摘　　要：基于湍流对激光束的扩散和漂移效应,提出了一种采用激光雷达观测湍流强度的方法。湍流对光束产生扩散和飘移作用,使激光光束偏离激光雷达接收视场,造成后向散射光能量损失。对比常规散射回波信号与畸变回波信号的差别可以测量湍流强度。实验表明该方法与其他方法的测量结果具有一致性,证明了该方法的有效性。A new method to measure intensity of atmosphere turbulence is proposed. The method is based on the phenomena of laser beam spreading and wandering caused by turbulence, which makes the laser beam propagate out of the receiver field of view. Thus, the backscatter power that lidar can receive is attenuated by turbulence. Turbulence intensity can be meas- ured by the way of comparing aberrant signal with normal signal. It is shown that test result of the method is in accord with that of another method. So the validity of the method is testified.

关 键 词：激光雷达 大气湍流 折射率结构常数 光束扩散 

分 类 号：TN249[电子电信—物理电子学]