Performance comparison of Fabry–Perot and Mach–Zehnder interferometers for molecular Doppler lidar based on fringe-imaging technique
Performance comparison of Fabry–Perot and Mach–Zehnder interferometers for molecular Doppler lidar based on fringe-imaging technique
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DOI：
10.1016/j.ijleo.2014.06.147
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发表时间：
2014-10
期刊：
影响因子：
3.1
通讯作者：
L. Tan;Dengxin Hua;Li Wang;Tingyao He;Yufeng Wang;Meili Xing
中科院分区：
文献类型：
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作者：
L. Tan;Dengxin Hua;Li Wang;Tingyao He;Yufeng Wang;Meili Xing
分析了用于非相干分子多普勒激光雷达的条纹成像法布里-珀罗干涉仪（FIFPI）和条纹成像马赫-曾德尔干涉仪（FIMZI）。对于纯分子后向散射信号，基于美国标准大气模型，模拟了FIFPI和FIMZI系统的性能（风测量灵敏度和信噪比）。在相同的发射和接收参数下，在一定的风速动态范围内，对两种系统进行了比较。模拟结果表明，单通道FIMZI系统对多普勒频移的敏感性较低，但在20 km范围内，其水平风速误差比FIFPI系统小1.3倍。我们期望FIMZI频率补偿技术能为提高非相干分子多普勒激光雷达的测量精度提供一种有效的方法。
Fringe-imaging Fabry–Perot interferometer (FIFPI) and fringe-imaging Mach–Zehnder interferometer (FIMZI) used as frequency discriminator for incoherent molecular Doppler lidar were analyzed, respectively. For a pure molecular backscattered signal, performances (wind measurement sensitivity and signal-to-noise ratio) of both FIFPI and FIMZI systems were simulated based on the U.S. standard atmospheric model. Comparisons of two systems were made under the same emitting and receiving parameters with certain wind speed dynamic range. Simulated results show that, though relatively lower sensitivity to Doppler shift, the single-channel FIMZI system provides a factor of 1.3 times smaller error in the horizontal wind velocity than that of FIFPI at a range of 20 km. We expect that the FIMZI frequency discriminator would provide an effective technique to improve the measurement accuracy for incoherent molecular Doppler lidar.