激光偏振技术压缩激光雷达信号动态范围  

Suppression of lidar dynamic range based on polarizing cell

作　　者：曹开法[1,2] 汪少林[1,2] 方欣[1,2] 谢军[1] 赵培涛[1,2] 胡顺星[1] 胡欢陵[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所大气光学实验室,合肥230031 [2]中国科学院研究生院,北京100049

出　　处：《激光技术》2009年第1期60-62,共3页Laser Technology

基　　金：国家八六三高技术研究发展计划资助项目(2002AA135030)

摘　　要：为了解决激光雷达信号的大动态范围引起远距离弱信号的失真问题,采用通过压缩信号的动态范围的方法,设计了一个利用电压调制系统透过率进而压缩激光雷达信号动态范围的方案。计算表明,系统最小透过率为4.05×10^(-5),可以压缩信号的动态范围达到4个数量级。利用激光雷达后向散射信号的两个方向偏振光,避免了时控光衰减器只透过一个方向偏振光的弊端。研究结果为压缩激光雷达信号动态范围提供了有价值的新方法。In order to reduce distortion of remote signal induced by wide dynamic range of lidar signal,a voltage controlled transmission modulation was used to suppress the dynamic range of lidar signal. The result of simulation indicates that the minimum transmissivity of the system is 4.05 × 10 ^-5 and the dynamic range can be reduced to 4 orders of magnitude. The system receives both ordinary light and extraordinary light, so it can avoid the disadvantage of the time-dependent attenuator in which only polarizing light in one direction can be received. It provides new valuable approach to suppress lidar dynamic range.

关 键 词：大气与海洋光学 动态范围 激光雷达 偏振 

分 类 号：TN958.98[电子电信—信号与信息处理]