测风激光雷达中F-P标准具的分析及性能检测  

Analysis and Performance of the Fabry-Perot Etalon for a Doppler Direct Detection Wind Lidar

作　　者：夏海云[1] 孙东松[2] 钟志庆[3] 王邦新[3] 陈敏[1] 

机构地区：[1]苏州大学物理科学与技术学院,江苏苏州215006 [2]北京航空航天大学仪器科学与光电工程学院,北京100083 [3]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《激光与红外》2006年第1期29-31,共3页Laser & Infrared

摘　　要：基于双边缘技术的测风激光雷达中，多普勒频移由高分辨率的F—P标准具检测得到。数值计算了存在各种缺陷的标准具响应曲线，分析了入射光束发散角、表面质量以及平行度对透过率谱宽的影响。用等厚干涉的方法测量了标准具双通道的腔长差值和表面质量。在窄带和宽带光源照射下，分别测量了标准具双通道的透过率曲线。长期测量（22天）的系统误差为0．42～0．85m／s。A dual Fabry-Perot etalon with high spectral resolution is used as the frequency discriminator in the wind detection system. Simulations of the system at 1064nm using reasonable instrumental parameters are used to show the effects of the imperfections and the beam divergence to the etalon. The frequency center distance between the dual channels was measured from interferograms. Transmissions of the dual channels are also measured with CW laser and Q-switched pulse laser. Comparisons have been made between experiment data and theoretically derived transmission functions with designed parameters. System error ranges from 0.42 m/s to 0.85 m/s for a long period of 22 days.

关 键 词：激光测风雷达 Fabry—Perot标准具 气溶胶 多普勒效应 

分 类 号：TN958.98[电子电信—信号与信息处理]