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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。
The feasibility of using multi-longitudinal mode laser as detection light source for wind measurement of double-edge Doppler Lidar is discussed. The relationship between cavity length of multi-longitudinal mode laser cavity and cavity length of edge filter F-P etalon is given. The main characteristics of wind measurement with double longitudinal edges are analyzed. The sensitivity, signal-to-noise ratio and radial velocity error are calculated and compared with the single-longitudinal wind measurement. The problem of frequency drift of multi-longitudinal-mode lasers can be solved by dynamic frequency tracking technology similar to single longitudinal wind measurement.