基于双F-P标准具的直接探测测风激光雷达  

Direct detection Doppler wind lidar with twin-channel Fabry-Perot interferometer

作　　者：夏海云[1] 孙东松[2] 沈法华[2] 董晶晶[2] 钟志庆[2] 王邦新[2] 周小林[2] 李颖颖[2] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083 [2]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《红外与激光工程》2006年第z3期273-278,共6页Infrared and Laser Engineering

摘　　要：研制了基于双 F-P 标准具直接探测的地基测风激光雷达。简要回顾了双边缘直接探测技术,介绍了系统结构与控制。为验证系统测量结果的准确性,研制了多普勒校准仪。在±40 m/s 动态范围内的校准实验表明:当累计光子数达到2 000时,测风激光雷达系统对靶盘径向转速测量的标准误差为0.6 m/s。风场观测初步对比实验时,测风激光雷达的测量结果与风廓线测量结果一致。给出了24h 连续大气风场观测的结果:风场观测的垂直分辨率为21.2 m,每个径向观测的累积时间1 min,当激光雷达扫描视场内有云层时,测风激光雷达的探测高厦可达10 km。A ground direct detection Doppler wind lidar system which uses double-edge technique to measure wind profiles from the surface into the lower stratosphere has been developed.The basic principles of using double-edge technique with a twin-channel Fabry-Perot interferometer are given.The lidar structure and system operation are introduced.The lidar measurements are validated by comparing them with preset velocities on a uniquely designed verifying attachment.Experiment results show that an accuracy of 0.6 m/s can be obtained for 2 000 detected photons within a dynamic range of±40 m/s.Inter-comparison experiments are also carried out between Doppler wind lidar and wind profiler radar.Good agreement is obtained.A example of 24 h continuous observation of wind field is given,the measured wind profiles with a vertical spatial resolution of 21.2 m and averaging time of 1 min for each line-of-sight can extend into 10 km depending on the aerosol concentration.

关 键 词：激光雷达 直接探测 F-P标准具 

分 类 号：TN958.98[电子电信—信号与信息处理]