高光谱分辨率激光雷达探测大气透过率  

High spectral resolution lidar for measuring atmospheric transmission

作　　者：赵明[1,2] 谢晨波 钟志庆[1] 王邦新[1] 王珍珠 尚震[1,3] 谭敏[1,3] 刘东[1] 王英俭[1,4] 

机构地区：[1]中国科学院安徽光学精密机械研究所大气成分与光学辐射重点实验室,安徽合肥230031 [2]中国科学院大学,北京100049 [3]中国科学技术大学研究生院,安徽合肥230026 [4]中国科学技术大学环境科学与光电技术学院,安徽合肥230026

出　　处：《红外与激光工程》2016年第B05期76-80,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(41005014;41405032);中国科学院重点部署项目(KJZD-EW-TZ-G06-01);安徽省自主创新专项(12Z0104074)

摘　　要：研制了一台基于种子注入激光器和碘分子吸收滤光器的高光谱分辨率激光雷达。介绍了该系统的基本原理、数据反演方法和系统结构。分别在有云天气和沙尘天气时进行了高光谱分辨率激光雷达探测大气透过率的实验,并与用常规Fernald方法反演的结果进行对比。观测结果显示,不同种类的气溶胶粒子以及云具有不同的物理和光学性质,Fernald方法中假设的激光雷达比往往不符合实际情况,因此会产生较大的测量误差。而高光谱分辨率激光雷达可以利用分子散射和气溶胶散射的谱宽不同,将两种信号分离探测,避免了假设激光雷达比,从而实现大气透过率的高精度定量探测。A high spectral resolution lidar（HSRL） based on injection-seeded laser and iodine absorption filter has been developed. The basic principle, data processing method and configuration of HSRL were introduced. The HSRL measurement of atmospheric transmission in cloud and dust cases were presented,and compared with the results retrieved by the traditional Fernald method. Due to the nonidentity in physical and optical properties of different aerosols and cloud, the lidar ratio assumed in Fernald method cannot agrees well with the real atmosphere and produces considerable error in atmospheric transmission.Utilizing different spectral width of molecular scattering and particle scattering, the HSRL could separate two kinds of signals with iodine filter. Therefore, HSRL can measure the atmospheric transmission quantitatively without the additional assumption of lidar ratio.

关 键 词：高光谱分辨率激光雷达 大气透过率 碘分子吸收池 

分 类 号：TN249[电子电信—物理电子学]