Single-photon laser methane detection methodology and initial validation  

作　　者：Shouzheng Zhu Shijie Liu Guoliang Tang Xin He Senyuan Wang Shicheng Yang Pujiang Huang Wenhang Yang Hao Zhou Bangjian Zhao Chunlai Li Jianyu Wang 朱首正;刘世界;唐国良;何欣;王森远;杨诗承;黄浦江;杨文航;周浩;赵帮健;李春来;王建宇(Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China [2]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China [5]School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China

出　　处：《Chinese Optics Letters》2024年第10期1-5,共5页中国光学快报（英文版）

基　　金：supported by the National Defense Pre-Research Foundation of China during the 14th Five-Year Plan Period(No.D040107);173 Key Projects of Basic Research(No.2021-JCJOZD-025-11);High Resolution Imaging Spectrometer(HRIS)Technology and Equipment(No.2023C03012);Research Funds of Hangzhou Institute for Advanced Study,UCAS(Nos.B02006C019019 and B02006C019001)。

摘　　要：Responding to the urgency of remote sensing for monitoring large concentrations of methane leakage,a high-speed modulation continuous laser methane leakage remote methodology based on a near-infrared single-photon avalanche diode detector(SPAD)and a lower power distributed feedback laser was developed.Based on the proposed laser modulation and time-correlated single-photon counting method,the method could simultaneously detect the methane concentration and background target distance.The effects of SPAD dead time and after-pulse probability on the intensity of methane spectra were investigated.The proposed ranging and methane sensing method was also demonstrated by conducting outfield observation through the verification system.The measured methane absorption spectral intensity was verified and consistent with theoretical value.The initial validation results provide a new scheme for subsequent single-photon gas detection,and reference for subsequent methane monitoring equipment development.

关 键 词：single-photon avalanche diode METHANE remote sensing continuous laser modulation spectroscopy 

分 类 号：TN249[电子电信—物理电子学] TN312.7[化学工程—有机化工] TQ221.11