温度压强对CO_2吸收光谱的影响  

Influence of temperature and pressure on absorption spectrum of around 1.6 μm for differential absorption lidar

作　　者：朱湘飞[1] 林兆祥[1] 刘林美[1] 邵君宜 龚威[2] 

机构地区：[1]中南民族大学电子信息工程学院,武汉430074 [2]武汉大学测绘遥感信息工程国家重点实验室,武汉430079

出　　处：《物理学报》2014年第17期153-159,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:41127901)资助的课题~~

摘　　要：为了提高差分吸收CO2探测激光雷达的反演精度,本文采用可调谐半导体激光吸收光谱技术,利用双光路差分实验系统,在不同温度和压强下精确探测了CO2吸收谱线(1.572μm附近)的精细结构,分析了吸收光谱谱型的变化差异,获得了5个温度(287K,297K,311K,315K,324K)的压力增宽系数和吸收截面,推算出了CO2的温度相关指数.这些参数是对现有数据库的补充和完善,确保差分吸收CO2探测激光雷达的精确反演,从而提高其探测能力.In order to improve the inversion precision of CO2 lidar, the fine structure in CO2 absorption spectrum （at around 1.572 μm） has been detected accurately, with tunable diode laser absorption spectroscopy （TDLAS） technique in a double beam differential system. Differences between absorption spectra were analyzed. The five kinds of pressure-broadened coefficients and absorption cross sections are obtained respectively at 287, 297, 311, 315 and 324 K. The temperature- dependent exponents of CO2 are also calculated, these parameters would be a series of corrections and supplements for the existing database. These results may help improve the detection capability of CO2 lidar.

关 键 词：大气光学 激光雷达 CO2吸收光谱 双光路差分 

分 类 号：O433.51[机械工程—光学工程]