Quantum cascade laser-based spectrometer for high sensitive measurements of trace gases in air  

作　　者：汤媛媛 刘文清 阚瑞峰 张玉钧 陈东 张帅 阮俊 

机构地区：[1]Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Optics Letters》2012年第4期33-35,共3页中国光学快报（英文版）

基　　金：supported by the Main Direction Program of Knowledge Innovation of the Chinese Academy of Sciences(No.KGCX2-YW-121);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA05040102);the National"973"Program of China(No.2010CB234607)

摘　　要：A quantum cascade（QC）laser-based spectrometer is developed to measure trace gases in air.The proposed spectrometer is tested for N2O,and the results presented in this letter.This system takes advantage of recent technology in QC lasers by utilizing intra-pulse scan spectroscopy,which allows high sensitive measurement.Without calibration gases,the gas concentration can be calculated with scan integration and the corresponding values from the HITRAN04 database.By analyzing the Allan variance,a detection limit of 2 ppb is obtained.Continuous measurement of N2O sampled from ambient air shows the applicability of the proposed system for the field measurements of gases of environmental concern.A quantum cascade（QC）laser-based spectrometer is developed to measure trace gases in air.The proposed spectrometer is tested for N2O,and the results presented in this letter.This system takes advantage of recent technology in QC lasers by utilizing intra-pulse scan spectroscopy,which allows high sensitive measurement.Without calibration gases,the gas concentration can be calculated with scan integration and the corresponding values from the HITRAN04 database.By analyzing the Allan variance,a detection limit of 2 ppb is obtained.Continuous measurement of N2O sampled from ambient air shows the applicability of the proposed system for the field measurements of gases of environmental concern.

关 键 词：GASES Quantum cascade lasers SPECTROMETRY 

分 类 号：TN248[电子电信—物理电子学]