1.65mmCH4低温吸收光谱特性研究

大气与环境光学学报 ›› 2012, Vol. 7 ›› Issue (1): 13-17.

1.65mmCH4低温吸收光谱特性研究

高伟^{1, 2}，陈卫东³，张为俊^1,2，高晓明^{1, 2}

1. 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室，安徽合肥 230031;
2. 中国科学院安徽光学精密机械研究所环境光谱学研究室，安徽合肥 230031; 3. 法国滨海大学大气物理与化学实验室,法国敦刻尔克 59140;

收稿日期:2011-04-26 修回日期:2011-09-16 出版日期:2012-01-25 发布日期:2011-12-27
作者简介:高伟（1986-），男，安徽铜陵人，博士生，研究方向为低温大气分子研究光谱。
基金资助:
中国科学院重大科研装备研制项目（YZ200818)资助

Characteristics of CH4 Spectroscopy at low temperature near 1.65 ?m

GAO Wei^{1, 2}，CHEN Wei-dong³，ZHANG WEI-jun^{1, 2}，GAO Xiao-ming^{1, 2}

1. Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2. Environmental Spectroscopy Laboratory of Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
3. Laboratoire de Physicochimie de l’Atmosphère, Université du Littoral C?te d’Opale, 189A, Avenue Maurice Schumann, 59140 Dunkerque, France

Received:2011-04-26 Revised:2011-09-16 Published:2012-01-25 Online:2011-12-27

摘要/Abstract

摘要：

在CH₄吸收光谱参数运用于对地球大气以及外星球的遥感探测和模拟上，CH₄光谱参数的准确性十分重要，尤其是在低温情况下的光谱参数。HITRAN数据库中CH₄给出的低温情况下的参数并不完整,同时存在较大的误差。为了对1.65?m的CH₄低温吸收光谱进行测量,采用窄线宽的二极管激光器作为光源，结合自主设计的低温装置，测量了CH₄的低温吸收光谱特性，同时给出6039.70 cm^-1处CH₄的低温吸收光谱作为典型给以阐述，并对吸收谱线的自展宽系数的温度依赖系数的测定方法进行了讨论。

关键词: 可调谐半导体激光吸收光谱, 低温谱线, 温度依赖系数

Abstract:

The absorption spectral parameters are important when the parameters are used to sense and model the atmospheres of the Earth and the outer planets, especially in low temperature. Sometimes CH₄ parameters listed in the HITRAN database are uncertain to some extent. In order to measure the low temperature absorption spectroscopy of methane, a newly developed cryogenic cell by ourselves was used in combination with a distributed feedback (DFB) diode laser as the light source and low temperature absorption spectroscopy of methane at 1.65 ?m were measured. The low temperature absorption spectroscopy of methane at 6039.70 cm^-1 is given for example and the method to measure the temperature-dependent exponent of self-broadening coefficient of methane is discussed.

Key words: tunable diode laser absorption spectroscopy, Low temperature spectrum, temperature-dependent exponent

中图分类号:

O433.1

高伟，陈卫东，张为俊，高晓明. 1.65mmCH4低温吸收光谱特性研究[J]. 大气与环境光学学报, 2012, 7(1): 13-17.

GAO Wei，CHEN Wei-dong，ZHANG WEI-jun，GAO Xiao-ming. Characteristics of CH4 Spectroscopy at low temperature near 1.65 ?m[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(1): 13-17.

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