基于积分腔输出光谱技术的水汽探测研究  

Detection of Water Vapour Based on Integrated Cavity Output Spectroscopy

作　　者：裴世鑫[1] 崔芬萍[1] 张成义[1] 李传起[1,2] 

机构地区：[1]南京信息工程大学数理学院,江苏南京210044 [2]广西师范大学电子工程学院,广西桂林541004

出　　处：《光学学报》2010年第12期3655-3659,共5页Acta Optica Sinica

基　　金：国家自然科学基金(10804053);江苏省自然科学基金(BK2008437);江苏省高校自然科学基金(09KJB170003);南京信息工程大学科研基金(20080281)资助课题

摘　　要：以中心输出波长为1315nm的可调谐分布反馈式(DFB)半导体激光器作光源,用反射率为99.7%左右的平凹镜组成长38cm的稳定光学谐振腔作吸收池,建立了一套基于可调谐半导体激光器的积分腔输出光谱(TDL-ICOS)系统。对TDL-ICOS实验系统和半导体激光的波长定标做了介绍;用ICOS技术获得了水汽在7612.026,7612.269和7610.224cm-1等3个波长处的吸收光谱,探测灵敏度达2.02×10-7cm-1。研究结果表明,ICOS是一种装置简单,易于操作的直接吸收光谱技术,具有高灵敏度和高分辨率的显著优点。A system of integrated cavity output spectroscopy（ICOS） based on a tunable distributed feedback（DFB） diode laser（TDL） is described.In this system a tunable DFB diode laser with the central output wavelength 1315 nm is used as the light source,the length of the absorption cell is 38 cm which is consisted by two mirrors with high reflectivity,near the laser central wavelength 1315 nm,the mirror′s reflectivity is about 99.7%.Presentation of experimental principle,experimental scheme and diode laser wavelength calibration are given;As experimental result,the absorption spectrum of water vapour at 7612.026,7612.269 and 7610.224 cm-1 are obtained and a detection sensitivity of 2.02×10-7 cm-1 has been achieved.It is experimentally demonstrated that ICOS is a high sensitive and high resolution spectral technology with the advantage of simple experimental setup and easy operation.

关 键 词：光谱学 灵敏度 积分腔输出光谱 水汽 可调谐半导体激光器 

分 类 号：O436[机械工程—光学工程]