非线性拉曼激光雷达测量CO<SUB>2</SUB>气体的研究

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摘要：提出了利用气体的受激拉曼散射(SRS)效应激光雷达光源来探测大气中的CO₂气体的新方法，设计出探测大气中CO₂气体含量的非线性拉曼增益激光雷达，用Nd:YAG激光器(1064 nm)的三倍频光(354.7 nm)通过分别装有CO₂气体和N₂气体的拉曼管，分别得到CO₂气体和N₂气体的受激拉曼散射的一阶斯托克斯线(S1)，并用S1线作为雷达的种子发射光源。通过实验得到拉曼管中的气压与S1能量的变化关系，对其优化条件和物理机制进行了分析。该实验方法已经成功测出了大气中CO₂气体的回波电压信号。

关键词：激光雷达;CO₂气体;受激拉曼散射

Abstract：It is a new skill to use SRS rays as emitting waves for the lidar monitoring CO₂ gas, and the nonlinear Raman lidar based on the SRS process was devised. The third harmonic Nd:YAG laser wave (354.7 nm) was injected into the Raman cells filled with higher pressure gases, CO₂ and N₂. The first Stokes (S1) line 371.66 nm (CO₂) and 386.7 nm (N₂) were generated by stimulated Raman scattering. The variable S1 energy was measured by changing the gas pressure in the Raman cell and the Nd:YAG laser system output energy. The optimum pressures of the CO₂ and N₂ in the Raman cell were achieved. Moreover, the principles of this physical process were put forward. This skill has been applied to the lidar for monitoring the CO₂ gas.

Key words：Laser lidar;CO₂ Gas;SRS

收稿日期: 2005-01-16 修订日期: 2005-05-08

中图分类号:

O433.5

通讯作者: 赵曰峰

引用本文:

赵曰峰，张寅超，洪光烈，刘小勤，曹开法，方欣，陶宗明，余诗华，屈凯峰，邵石生 . 非线性拉曼激光雷达测量CO₂气体的研究[J]. 光谱学与光谱分析, 2006, 26(05): 794-797.
ZHAO Yue-feng,ZHANG Yin-chao,HONG Guang-lie,LIU Xiao-qin,CAO Kai-fa,FANG Xin,TAO Zong-ming,YU Shi-hua,QU Kai-feng,SHAO Shi-sheng. Study on the Nonlinear Raman Lidar Monitoring the CO₂ Gas. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(05): 794-797.

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https://www.gpxygpfx.com/CN/Y2006/V26/I05/794