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首页> 外文期刊>Applied optics >Ultraviolet Rayleigh-Mie lidar by use of a multicavity Fabry-Perot filter for accurate temperature profiling of the troposphere
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Ultraviolet Rayleigh-Mie lidar by use of a multicavity Fabry-Perot filter for accurate temperature profiling of the troposphere

机译：通过使用多腔Fabry-Perot滤光片进行的紫外线Rayleigh-Mie激光雷达，可对流层进行精确的温度分析

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摘要

A UV Rayleigh-Mie scattering lidar system at 355 nm has been upgraded for more-accurate temperature profiling of the troposphere by use of a new multicavity Fabry-Perot etalon (MCFPE) filter. The MCFPE filter, which was designed to improve the stability and operational characteristics of the lidar system, has three filter bandpass functions and separates one Mie scattering and two Rayleigh scattering signals from the lidar return signal and simultaneously acts as a laser frequency discriminator to lock the laser frequency. Moreover, a high-resolution grating is employed to block signal interference from Raman scattering and the solar background. A practical lidar system, which features strong system stabilization and high measurement accuracy, has been built, and the performance of the lidar system has been verified by comparison of temperature profiling between the lidar and a radiosonde. Good agreement between the two instrument measurements was obtained in terms of lapse rate and inversion layer height. Statistical temperature errors of less than 1 K up to a height of 3 km are obtainable with 5 min observation time for daytime measurements.
机译：通过使用新的多腔法布里-珀罗标准具（MCFPE）滤光片，已升级了355 nm的UV Rayleigh-Mie散射激光雷达系统，以对流层进行更精确的温度分析。 MCFPE滤波器旨在提高激光雷达系统的稳定性和运行特性，具有三种滤波器带通功能，可将激光雷达返回信号中的一个Mie散射信号和两个Rayleigh散射信号分开，并同时充当激光鉴频器来锁定激光频率。此外，采用高分辨率光栅来阻挡来自拉曼散射和太阳本底的信号干扰。已经建立了具有强大的系统稳定性和高测量精度的实用激光雷达系统，并且通过比较激光雷达和无线电探空仪之间的温度曲线图验证了激光雷达系统的性能。两次仪器测量的失误率和反演层高度都取得了很好的一致性。在5分钟的观察时间内进行白天测量时，可获得小于1 K的统计温度误差，直至3 km的高度。

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