典型文献
High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy
文献摘要：
Continuous-wave cavity ring-down spectroscopy(CW-CRDS)is an important technical means to monitor greenhouse gases in atmospheric environment.In this paper,a CW-CRDS system is built to meet the needs of atmospheric methane monitoring.The problem of mode matching is explained from the perspective of transverse mode and longitudinal mode,and the influence of laser injection efficiency on measurement precision is further analyzed.The results of cavity ring-down time measurement show that the measurement precision is higher when the laser is coupled with the fundamental mode.In the experiment,DFB laser is used to calibrate the system with standard methane concentration,and the measurement residual is less than±4×10-4 μs-1.The methane concentration in the air is monitored in real time for two days.The results show the consistency of the concentration changes over the two days,which further demonstrates the reliability of the system for the measurement of trace methane.By analyzing the influence of mode matching,it not only assists the adjustment of the optical path,but also further improves the sensitivity of the system measurement.
文献关键词：
中图分类号：
作者姓名：
Zhe Li;Shuang Yang;Zhirong Zhang;Hua Xia;Tao Pang;Bian Wu;Pengshuai Sun;Huadong Wang;Runqing Yu
作者机构：
Anhui Provincial Key Laboratory of Photonic Devices and Materials,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China
文献出处：
引用格式：
[1]Zhe Li;Shuang Yang;Zhirong Zhang;Hua Xia;Tao Pang;Bian Wu;Pengshuai Sun;Huadong Wang;Runqing Yu-.High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy)[J].中国物理B（英文版）,2022(09):366-372
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High,sensitivity,methane,monitoring,quasi,fundamental,mode,matched,continuous,wave,cavity,down,spectroscopy,Continuous,CW,CRDS,important,technical,means,greenhouse,gases,atmospheric,environment,In,this,paper,system,built,meet,needs,problem,matching,explained,from,perspective,transverse,longitudinal,influence,laser,injection,efficiency,measurement,precision,further,analyzed,results,show,that,higher,when,coupled,experiment,DFB,used,calibrate,standard,concentration,residual,less,air,monitored,real,two,days,consistency,changes,over,which,demonstrates,reliability,trace,By,analyzing,not,only,assists,adjustment,optical,path,but,also,improves
AB值：
0.501285
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