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设计了采用532 nm种子注入稳频钇铝石榴石(YAG)激光器作为辐射源的基于四通道法布里-珀罗标准具的瑞利和米散射测风激光雷达系统。介绍了激光雷达的多普勒测量基本原理;给出了雷达系统的主要参数,重点对基于分子后向散射信号的外侧双通道标准具的带宽、自由谱间距、峰值间距等指标进行了详细设计与分析,确定了内侧双通道标准具参数;对全系统速度灵敏度、信噪比与探测距离的关系进行了理论模拟。结果表明,可以实现从边界层至对流层高低空一体化探测。
A Rayleigh and rice scattering wind lidar system based on four-channel Fabry-Perot etalon with 532 nm seed injection stabilized YAG laser as the radiation source was designed. The basic principle of Doppler measurement of LIDAR is introduced. The main parameters of radar system are given. The bandwidth, free spectrum spacing and peak spacing of the outer two-channel etalon based on molecular backscattering signal are mainly discussed. With the analysis, the parameters of the inner two-channel etalon were determined. The relationship between the whole system velocity sensitivity, the signal-to-noise ratio and the detection distance was theoretically simulated. The results show that it is possible to realize the integrated exploration from the boundary layer to the troposphere.