光学学报, 2019, 39 (3): 0301004, 网络出版: 2019-05-10
全天时大气温度探测的纯转动拉曼激光雷达系统设计与仿真 
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Design and Simulation of Pure Rotational Raman Lidar System for Daytime Detection of Atmospheric Temperature
大气光学 转动拉曼激光雷达 大气温度 全天时 日盲紫外 三次衍射式双光栅多色仪 atmosphere optics rotational Raman lidar atmospheric temperature daytime solar-blind triple-diffraction double grating polychromator
摘要
提出了一种全天时大气温度探测的纯转动拉曼激光雷达系统,选用Nd…YAG脉冲激光器的四倍频输出266.0 nm作为激励波长,避开了强烈的太阳背景光对系统探测大气温度的影响。设计了一种新型三次衍射式双光栅多色仪作为激光雷达的分光系统。仿真结果表明,双光栅多色仪可实现Stokes与Anti-Stokes高低量子数通道转动拉曼谱线的有效提取,对米-瑞利弹性散射信号的抑制率可达到60~70 dB。充分考虑臭氧吸收和荧光对系统探测性能的影响,所设计的日盲紫外纯转动拉曼激光雷达采用模拟探测模式可在12 min的积分时间内实现2.2 km高度范围内大气温度的全天时探测。
Abstract
A pure rotational Raman lidar for measuring atmospheric temperature on daytime is proposed. The quadruple frequency of 266.0 nm of Nd…YAG pulsed laser is selected as the transmitter wavelength, which avoids the effect of solar background light on the detection of atmospheric temperature. A new type of triple-diffraction double grating polychromator is designed as the spectroscopic system of lidar. Simulation results show that the designed double grating polychromator can achieve the extraction of Stokes and Anti-Stokes pure rotational Raman signals from high and low quantum number channels. The suppression rate of the Mie-Rayleigh scattering signals is up to 60-70 dB. Meanwhile, considering the effects of the ozone absorption and fluorescence on the detection performance of the system, the designed solar-blind ultraviolet pure rotational Raman lidar system with the analog detection mode can detect atmospheric temperature in the range of 2.2 km in 12 minutes' integration time.
高飞, 黄波, 石冬晨, 朱青松, 张锐, 汪丽, 李仕春, 华灯鑫. 全天时大气温度探测的纯转动拉曼激光雷达系统设计与仿真[J]. 光学学报, 2019, 39(3): 0301004. Fei Gao, Bo Huang, Dongchen Shi, Qingsong Zhu, Rui Zhang, Li Wang, Shichun Li, Dengxin Hua. Design and Simulation of Pure Rotational Raman Lidar System for Daytime Detection of Atmospheric Temperature[J]. Acta Optica Sinica, 2019, 39(3): 0301004.
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