摘要
讨论采用多纵模激光器作探测光源用于双边缘多普勒激光雷达测风的可行性。给出了多纵模激光器谐振腔腔长与边缘滤波器F-P标准具腔长之间的关系。分析了多纵模双边缘测风的主要特性,计算灵敏度、信噪比和径向测速误差,并与单纵模测风性能进行对比。可用类似单纵模测风中动态频率跟踪技术解决多纵模激光器频率漂移问题。
Feasibility is discussed that a multi-longitudinal mode laser is employed as the detection light source of the double-edge technique for Doppler lidar wind measurement.The connection between resonator length of a multi-longitudinal mode laser and cavity length of a F-P etalon used as the edge filter is put forward.Main characteristics of double-edge wind measurement with a multi-longitudinal mode laser are analyzed.Sensitivity,signal-to-noise ratio and error in the line-of-sight（LOS） velocity of edge detection wind measurement using a multi-longitudinal mode laser are calculated and compared with those of using a single-mode laser.What＇s more,frequency drift of a multi-longitudinal mode laser can be solved by a technology similar to dynamic frequency tracking used in single-mode wind measurement.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2008年第1期48-51,54,共5页
Optical Technique
