Raman signal enhancement for gas detection using a dual near-concentric cavities group  

作　　者：任一凡 杨德旺 孙颖欣 许家旋 刘硕芳 陈月娥 Yifan Ren;Dewang Yang;Yingxin Sun;Jiaxuan Xu;Shuofang Liu;Yuee Chen(Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao 066004,China;College of Ocean Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]Key Laboratory for Microstructural Material Physics of Hebei Province,School of Science,Yanshan University,Qinhuangdao 066004,China [2]College of Ocean Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China

出　　处：《Chinese Optics Letters》2024年第5期47-52,共6页中国光学快报（英文版）

基　　金：This work was supported by the High-end Foreign Experts Introduction Plan(No.G2021003003L);the Hebei Province Introduced Foreign Intelligence Projects(No.2022-18).

摘　　要：Effective methods are urgently required to optimize Raman spectroscopy technology to ameliorate its low detection sensitivity.Here,we superposed two near-concentric cavities to develop a dual near-concentric cavities group(DNCCG)to assess its effect on gas Raman signal intensity,signal-to-noise ratio(SNR),and limit of detection(LOD).The results showed that DNCCG generally had higher CO_(2) Raman signal intensity than the sum of two near-concentric cavities.Meanwhile,the noise intensity of DNCCG was not enhanced by the superposition of near-concentric cavities.Accordingly,DNCCG increased the SNR.The LOD for CO_(2) was 24.6 parts per million.DNCCG could be an effective method to improve the detection capability of trace gases and broaden the dynamic detection range,which might aid the future development of innovative technology for multicomponent gas detection.

关 键 词：Raman spectroscopy gas detection sensitivity dual near-concentric cavities group 

分 类 号：O657.37[理学—分析化学]