基于光声光谱技术的1.5μm波段NH_3吸收谱线测量与分析  

Detection and Analysis of Ammonia Absorption Line at 1.5 μm Region Based on Photoacoustic Spectroscopy

作　　者：曹新丹[1] 刘先勇[1] 蒙瑰[1] 倪士虎[1] 

机构地区：[1]西南科技大学信息工程学院,四川绵阳621010

出　　处：《发光学报》2012年第9期1025-1029,共5页Chinese Journal of Luminescence

基　　金：西南科技大学与四川省煤炭产业集团重大合作项目(07zh0164);国防预研基金(A3120060267);四川省教育厅重大培育项目(07zz039);四川省安监局项目(07zd0103)资助

摘　　要：NH3的检测具有广泛的应用,采用光声法检测NH3是当前研究的热点,而确定NH3的吸收谱线则是实现光声法检测NH3的前提。采用外腔可调谐半导体激光器构造了光声气体检测系统,检测了NH3的近红外吸收谱线,获得了常温常压下NH3在1 515～1 532 nm范围内的吸收光谱。实验确认了NH3在1 515.2,1 516.0,1 518.0,1 519.9,1 522.4,1 527.0,1 531.7 nm处存在强吸收。HITRAN 2004光谱数据库在近红外1.5μm波段NH3的吸收谱线数据未见报道,该结果为研究光声法检测NH3提供了更多可选择的吸收谱线。Ammonia detecting has a wide range of applications,and currently attracts considerable attention through the photoacoustic.The premise of detecting is to determine the absorption lines of ammonia.At normal pressure and temperature,the absorption spectrum of ammonia at the range of 1 515~1 532 nm was measured with an external cavity tunable semiconductor laser through the photoacoustic spectroscopy gas detection theory.Seven ammonia absorption lines,at 1 515.2,1 516.0,1 518.0,1 519.9,1 522.4,1 527.0,1 531.7 nm,were scanned by resetting the laser tuning range and were confirmed having strength absorption.The spectroscopic database of HITRAN 2004 do not contain ammonia spectrum in the 1.5 μm region,and the results of this paper provided more ammonia absorption lines to choose for the ammonia detection research based on photoacoustic.

关 键 词：光声光谱 外腔可调谐半导体激光器 吸收谱线 NH3检测 

分 类 号：O433.1[机械工程—光学工程]