High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy

doi:10.1088/1674-1056/ac5d33

	High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy
	Li, Zhe 1,2; Yang, Shuang 1; Zhang, Zhirong 1,3,4; Xia, Hua 1; Pang, Tao 1; Wu, Bian 1; Sun, Pengshuai 1; Wang, Huadong 1; Yu, Runqing 1,2
刊名	CHINESE PHYSICS B
	2022-09-01
卷号	31
关键词	continuous-wave cavity ring-down spectroscopy (CW-CRDS) cavity modes coupling efficiency mode matching greenhouse gas
ISSN号	1674-1056
DOI	10.1088/1674-1056/ac5d33
通讯作者	Zhang, Zhirong(zhangzr@aiofm.ac.cn)
英文摘要	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 x 10(-4) mu s(-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.
资助项目	Natural National Science Foundation of China[11874364] ; Natural National Science Foundation of China[41877311] ; Natural National Science Foundation of China[42005107] ; National Key Research and Development Program of China[2017YFC0805004] ; CAS & Bengbu Technology Transfer Project[ZKBB202102]
WOS关键词	ABSORPTION-SPECTROSCOPY ; FREQUENCY ; SPECTROMETER ; NOISE
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000852862600001
资助机构	Natural National Science Foundation of China ; National Key Research and Development Program of China ; CAS & Bengbu Technology Transfer Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128875]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Zhirong
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Anhui Prov Key Lab Photon Devices & Mat, HFIPS, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, HFIPS, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 4.Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhe,Yang, Shuang,Zhang, Zhirong,et al. High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy[J]. CHINESE PHYSICS B,2022,31.
APA	Li, Zhe.,Yang, Shuang.,Zhang, Zhirong.,Xia, Hua.,Pang, Tao.,...&Yu, Runqing.(2022).High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy.CHINESE PHYSICS B,31.
MLA	Li, Zhe,et al."High-sensitivity methane monitoring based on quasi-fundamental mode matched continuous-wave cavity ring-down spectroscopy".CHINESE PHYSICS B 31(2022).