基于腔衰荡的多谱线光谱分析
Multispectral line spectral analysis based on cavity ring-down spectroscopy
摘要
Abstract
Laser absorption spectroscopy(LAS)has been widely applied in atmospheric monitoring,industri-al production,medical diagnostics,and other fields due to its high sensitivity,rapid response,and real-time online detection capabilities.However,spectral overlap interference remains a major challenge in LAS.In this study,a multispectral line spectral analysis approach based on cavity ring-down spectroscopy(CRDS)is proposed.A CRDS gas detection system was developed using a custom-designed cage-type Fabry-Pérot cav-ity,and seven acetylene(C2H2)absorption lines in the range of 6452 cm-1 to 6453 cm-1 were selected for in-vestigation.Experimental results demonstrate that the system is capable of accurately measuring and filling the multi-line absorption spectra of C2H2 with a minimum detection limit of 3.517×10-8 cm-1,corresponding to a minimum detection volume fraction of 4.37×10-6.Additionally,the intracavity pressure was precisely measured using a calibrated high-precision vacuum gauge.By analyzing the pressure-broadening effects ob-served in the absorption spectra,we calculated the pressure-broadening coefficients for three absorption lines,achieving a relative deviation below 0.04.This study provides a novel method for multispectral line spectral analysis in LAS,improving measurement accuracy and broadening its applicability.关键词
腔衰荡光谱/多谱线光谱分析/痕量气体测量/压强展宽系数Key words
cavity ring-down spectroscopy/multispectral line spectral analysis/trace gas measurement/pres-sure-broadening parameter分类
数理科学引用本文复制引用
原康杰,周月婷,宫廷,闫翔,孙小聪,邱选兵,李传亮..基于腔衰荡的多谱线光谱分析[J].中国光学（中英文）,2025,18(6):1298-1306,9.基金项目
国家自然科学基金(No.62475182,No.62505213) （No.62475182,No.62505213）
国家重点研发计划(No.2023YFF0718100) （No.2023YFF0718100）
山西省科技创新人才团队专项资助(No.202304051001034) （No.202304051001034）
山西省重点研发计划(No.202302150101017) （No.202302150101017）
山西省留学人员科技活动项目(No.20230031) （No.20230031）
山西省省筹资金资助回国留学人员科研资助项目(No.2023-151) （No.2023-151）
山西省基础研究计划(No.202203021222204) （No.202203021222204）
山西省高等学校科技创新计划项目(No.2024L227) （No.2024L227）
山西省研究生教育教学改革课题(No.2024JG161)Supported by National Natural Science Foundation of China(No.62475182,No.62505213) （No.2024JG161）
National Key R&D Program of China(No.2023YFF0718100) （No.2023YFF0718100）
Special Funding for Shanxi Provincial Science and Tech-nology Innovation Talent Team(No.202304051001034) （No.202304051001034）
Key R&D Program of Shanxi Province(No.202302150101017) （No.202302150101017）
Science and Technology Activities Project for Overseas Students in Shanxi Province(No.20230031) （No.20230031）
Shanxi Provincial Fund-raising Funding Project for Returning Overseas Students(No.2023-151) （No.2023-151）
Fundamental Research Program of Shanxi Province(No.202203021222204) （No.202203021222204）
Science and Technology Innova-tion Program for Higher Education Institutions in Shanxi Province(No.2024L227) （No.2024L227）
Shanxi Provincial Post-graduate Education and Teaching Reform Project(No.2024JG161) （No.2024JG161）
