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    • 摘要: 论证了马赫-曾德尔干涉仪对532 nm/354.7 nm大气后向散射的频谱分析性能。马赫-曾德尔干涉仪接收激光大气后向散射回波,通过测量双臂光路、正交偏振、四通道结构形成的干涉相位差和干涉对比度,计算大气的多普勒频移,以及大气气溶胶后向散射与气体分子后向散射的比值;发射脉冲激光器及其倍频器可以直接工作在多纵模状态下,大气的后向散射的频谱分析器可以不必与发射光中心频率锁定;给出同时探测大气的后向散射比分布廓线及大气风速的分析方法。马赫-曾德尔干涉仪作为大气后向散射的频谱分析器,若应用于高光谱分辨率激光雷达中,将成为一个性能优秀、前景广阔的大气分析装置。

       

      Abstract: The ability to analyze the spectra of 532 nm/354.7 nm backscatter signal of atmosphere for Mach-Zehdner interferometer is demonstrated. The Mach-Zehdner interferometer accepts return signal. The phase difference and interference contrast are measured, which are formed by the interferometer's double arm, polarization and quadro-channels, and Doppler frequency shift of atmosphere and backscatter ratio of aerosol backscatter to molecular backscatter are derived. Transmitter laser can operate with multi-longitudinal mode, and Mie backscattering and Rayleigh backscattering analysis spectrograph is free from locking to laser frequency. Analysis method of simultaneous measurements atmosphere aerosol backscattering ratio profile and wind profile are also discussed. If Mach-Zehnder interferometer is employed as atmospheric backscatter signal's frequency spectrum analyzer, this high spectral resolution lidar will become an atmosphere analysis instrument with excellent performance and anticipant prospect.