Effects of wavelength shift and energy fluctuation on inversion of NO<sub>2</sub> differential absorption lidar

Qiu-wu LIU; Ya-feng CHEN; Jie WANG; Jian HUANG

doi:10.3788/OPE.20182602.0253

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Effects of wavelength shift and energy fluctuation on inversion of NO₂ differential absorption lidar

Modern Applied Opitics | 更新时间：2020-07-05

- Effects of wavelength shift and energy fluctuation on inversion of NO₂ differential absorption lidar
- Optics and Precision Engineering Vol. 26, Issue 2, Pages: 253-260(2018)
- 作者机构：
  
  1.中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室, 安徽合肥 230031
  2.中国科学技术大学, 安徽合肥 230026
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20182602.0253
  CLC： TN958.98
- Received：15 July 2017，
  
  Accepted：30 September 2017，
  
  Published：25 February 2018
- 稿件说明：
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Qiu-wu LIU, Ya-feng CHEN, Jie WANG, et al. Effects of wavelength shift and energy fluctuation on inversion of NO₂ differential absorption lidar[J]. Optics and precision engineering, 2018, 26(2): 253-260.
DOI：

Qiu-wu LIU, Ya-feng CHEN, Jie WANG, et al. Effects of wavelength shift and energy fluctuation on inversion of NO₂ differential absorption lidar[J]. Optics and precision engineering, 2018, 26(2): 253-260. DOI： 10.3788/OPE.20182602.0253.

摘要

为评估差分吸收二氧化氮激光雷达中激光器的稳定性对反演浓度的影响，以NO

的吸收谱和激光雷达方程为基础，分析了波长漂移和能量波动对距离分辨差分吸收激光雷达浓度反演带来的相对误差。采用两台Nd：YAG激光器的354.7 nm波长分别泵浦两台染料激光器的方式，产生差分吸收探测所需的两个波长

（448.10 nm）和

off

（446.80 nm），搭建探测大气NO

实验系统，并就波长漂移和能量波动对NO

浓度反演影响进行了实验验证。实验结果表明：在没有稳频条件下，当

和

off

波长漂移≤ 0.005 nm时，引起的浓度相对误差为≤ 3%；能量波动对反演浓度没有影响，但能量降低减小探测距离，当能量下降≤ 5%时，探测距离≤ 100 m，实验结果与理论计算基本一致。最后，开展了大气NO

浓度实验观测，获得实验期间水平及垂直高度0.5~3 km内NO

浓度的分布廓线，系统稳定可靠。本方法为实用化NO

差分吸收激光雷达的设计及应用提供了理论依据及技术支持。

Abstract

To evaluate the effect of the stability of the laser on the inversion of the NO

distribution in differential absorption based on the NO

absorption spectrum and the lidar equation. The relative errors caused by wavelength shift and energy fluctuation in the range resolved differential absorption lidar were analyzed. Two Nd:YAG lasers are used to pump into two dye lasers to produce two wavelengths

(448.1 nm) and

off

(446.6 nm)

respectively. In the absence of frequency and power stability conditions

the influence of the change of NO

absorption cross section caused by wavelength drift on the inversion concentration was analyzed. When the two wavelengths' drift is less than 0.005 nm

the total relative error of inversion concentration due to

and

off

wavelength drift is less than 3%

and

drift is the main factor. Then the influence of energy fluctuation on the inversion concentration is analyzed. The results show that the energy fluctuation has no effect on the inversion concentration

but the energy reduction will increase the statistical error. When the energy fluctuates in a range of 5% or less

detection range decreases about 100 meters. Lastly

the vertical or horizontal NO

profiles were measured at range of 0.5 km to 3.0 km. This method provides theoretical basis and technical support for the design and application of practical NO

differential absorption lidar.

关键词

Keywords

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Effects of wavelength shift and energy fluctuation on inversion of NO2 differential absorption lidar

DOI：10.3788/OPE.20182602.0253

摘要

Abstract

关键词

Keywords

references

Effects of wavelength shift and energy fluctuation on inversion of NO₂ differential absorption lidar