基于回波信号仿真的瑞利-喇曼-米激光雷达研制

 在分析瑞利、喇曼和米散射仿真回波信号的基础上,研制了一台探测大气温度、气溶胶和卷云的瑞利-喇曼-米散射激光雷达,实现了一台激光雷达针对大气温度、气溶胶和卷云光学特性的多参数探测。为提高瑞利和喇曼微弱回波信号信噪比,采用了极高灵敏度的R4632光电倍增管和光子计数技术;为实现对大气气溶胶和卷云的探测,532 nm回波信号采取高低分层技术、高层通道回波衰减方法和探测器门控技术。瑞利-喇曼-米散射激光雷达的探测结果证明了利用仿真回波信号指导激光雷达设计的可行性。

Development of Rayleigh-Raman-Mie lidar based on simulated signal

A Rayleigh-Raman-Mie lidar(RRML) was constructed to detect atmosphere temperature, aerosols and cirrus. The simulated signal was calculated using aerosol model and lidar system parameters, and the design method of the signal detection unit and optical receiver unit was based on the characteristic of the simulated signal. By using the extremely sensitive R4632 photomultiplier tube and the photon counting system, the lidar system achieved higher signal to noise ratios of Raman and Rayleigh signals. By using the PMT gating control unit and the optical signal attenuating mirror, the system could detect signals backscattered by aerosols and cirrus linearly. Finally, the signal detected by the RRML system was given, which proves the rationality of the RRML design method.