基于可调谐二极管激光吸收光谱遥测CH_4浓度  

The Study of Remote Sensing CH_4 Concentration Based on Tunable Diode Laser Absorption Spectroscopy

作　　者：汪世美[1] 刘文清[1] 刘建国[1] 涂兴华[1] 杨立书[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2006年第2期221-224,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(10274080)资助项目

摘　　要：文章对可调谐二极管激光的直接吸收和波长调制光谱进行了理论分析,设计了一套用于研究甲烷吸收特性的测量系统。近红外二极管激光工作在室温下,选用波长为1.65μm,利用甲烷的23ν带R(3)线实现对甲烷气体的吸收测量,对测量的信噪比和系统的基本噪声源进行了分析,为实现甲烷浓度的在线遥测打下基础。In the present paper, a review and analysis of the theory of direct absorption spectroscopy and modulation speetrosco py using tunable diode laser were provided, and a remote sensing system of CH4 was designed. A near infrared tunable diode la ser operating at wavelength 1.65 μm at room temperature was used to perform the measurement of CH4, using the R（6） line of the 2v3 band of methane. Signal to noise ratio and fundamental noise sources were also discussed. This work has laid the founda- tion lot remote sensing of CH4 online.

关 键 词：二极管激光 波长调制光谱 遥测 甲烷 

分 类 号：O433.1[机械工程—光学工程]