大气与环境光学学报, 2012, 7 (1): 13, 网络出版: 2012-01-16
1.65 μm CH4低温吸收光谱特性研究
Characteristics of CH4 Spectroscopy at Low Temperature Near 1.65 μm
可调谐半导体激光吸收光谱 低温谱线 温度依赖系数 tunable diode laser absorption spectroscopy low temperature spectrum temperature-dependent exponent
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 μm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,并对吸收谱线自展宽系数的温度依赖系数的测定方法进行了讨论。
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 μm 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 are discussed.
高伟, 陈卫东, 张为俊, 高晓明. 1.65 μm CH4低温吸收光谱特性研究[J]. 大气与环境光学学报, 2012, 7(1): 13. GAO Wei, CHEN Wei-dong, ZHANG WEI-jun, GAO Xiao-ming. Characteristics of CH4 Spectroscopy at Low Temperature Near 1.65 μm[J]. Journal of Atmospheric and Environmental Optics, 2012, 7(1): 13.