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提出了利用Fabry-Perot干涉仪的反射场实现高光谱分辨率激光雷达精细探测大气光学参量的新方法和思路.设计了高光谱分辨率的分光系统,并分析了干涉仪反射场的光谱透过特征曲线.结合高光谱激光雷达探测信号特征,讨论分析了谱分离比和瑞利信号透过率随反射率和腔长的变化曲线,同时结合误差传递公式,建立了仿真分析模型,讨论了回波光束发散角和入射角变化对激光雷达探测结果的影响.结果表明,所提出的Fabry-Perot干涉仪反射场可以实现高光谱分辨率激光雷达探测系统的精细分光,同时探测结果误差随回波光束发散角变化不敏感,控制发散角在10 mrad以内,入射角在1.5 mrad以内时,可以实现气溶胶光学参数廓线的高精度探测.
A new method and idea of using the reflection field of Fabry-Perot interferometer to realize the precise detection of atmospheric optical parameters by using hyperspectral resolution laser radar is proposed.The spectroscopic system with high spectral resolution is designed and the spectral transmission of the interferometer’s reflection field is analyzed The characteristic curve of the signal is discussed.According to the characteristics of the detection signal of the hyperspectral Lidar, the curves of spectral separation ratio and Rayleigh signal transmittance with the reflectivity and the cavity length are discussed and discussed, and the simulation analysis model is established based on the error transfer formula. The results show that the proposed Fabry-Perot interferometer reflection field can achieve the fine resolution of the LASR detection system, and the error of the detection results varies with the echo The change of beam divergence angle is insensitive. When the control divergence angle is within 10 mrad and the incident angle is within 1.5 mrad, the aerosol optical profile can be detected with high accuracy.