1.55μm全光纤多普勒测风雷达系统与试验  

Experiment of all fiber Doppler lidar at 1.55 μm

作　　者：冯力天[1] 郭弘其 陈涌[1] 何幸锴[1] 伍波[1] 杨泽后[1] 周鼎富[1] 

机构地区：[1]西南技术物理研究所,四川成都610041 [2]驻中国兵器工业209研究所军代处,四川成都610041

出　　处：《红外与激光工程》2011年第5期844-847,共4页Infrared and Laser Engineering

基　　金：人工影响天气监测装备研发基金(GYHY201006029)

摘　　要：为实现对大气风场三维信息快速、准确的测量,以人眼安全波长1.55μm窄线宽光纤激光器为光源,采用全光纤相干探测光路,研制出多普勒测风雷达系统。该雷达整机结构紧凑、体积小、测量精度高,并在原VAD反演方法的基础上,采用了一种遗传算法与非线性最小二乘相结合的改进算法来实现对风场的反演,使其具有更高的数据失真修正能力,风场反演的速度、精度均得到较大提高。试验结果表明,该雷达能实现5-200m高度范围内的风场测量。并在试验基地与测风塔内,分别就55m及100 m高度处与超声波风速仪进行了试验比对,试验结果显示：该测风雷达的风速测量精度（均方差）达到0.3m/s,风向精度（均方差）≤3°。Doppler lidar has been developed to rapidly detect the 3-D information of atmospheric wind with an eye-safe and accurate narrow-line-width fiber laser of 1.55 μm and the all-fiber coherent detective principle was employed.The lidar was compact with high accuracy.Based on the VAD inversion method,using a genetic algorithm combined with the nonlinear least squares algorithm to achieve improved wind inversion,it had a higher data distortion correction capability,and the speed of wind accuracy was improved greatly.The result of experiment indicate the lidar can detect any height of wind from 5 to 200 m,and the lidar contrast with the tower at the height of 55 m and 100 m.The lidar has high precision of measurement,and the velocity of wind is 0.3 m/s,with the direction of wind less than 3°.

关 键 词：全光纤 多普勒测风雷达 VAD 相干探测 窄线宽 

分 类 号：O439[机械工程—光学工程]