光学精密工程2025，Vol.33Issue(11)：1691-1699,9.DOI:10.37188/OPE.20253311.1691
提升多次反射腔增强拉曼气体检测灵敏度
Enhancing sensitivity of multi-pass cavity enhanced Raman gas detection
摘要
Abstract
To address the limited Raman scattering area,which diminishes signal strength and detection sensitivity,this study enhances the Raman signal intensity and detection sensitivity through optical path op-timization.Experiments investigating various reflection modes within the cavity and collection system an-gles examined the effects of the incident light′s polarization state and dual-path collection on the Raman scattering signal.Utilizing the optimized parameters,a multi-pass reflective cavity system was developed.Using the Raman spectra of oxygen and nitrogen in air as reference signals,results demonstrated that the signal intensity with P-polarized incident light was 1.3 times greater than that with S-polarized light.Im-plementation of a dual-path collection system increased the total collected scattered light,thereby improv-ing Raman scattering collection efficiency.The signal-to-noise ratio of the dual-channel collection system increased by 1.5 times for Channel A and 1.7 times for Channel B,enabling the detection of carbon diox-ide in air.Furthermore,the device exhibited a strong linear correlation between signal intensity and gas concentration,confirming its capability for quantitative analysis.关键词
光谱学/拉曼光谱/气体检测/腔增强/近共心腔Key words
spectroscopy/Raman spectroscopy/gas detection/cavity-enhanced/near-confocal cavity分类
数理科学引用本文复制引用
李尚锦,丁腾龙,张衍群,苏殿强,姬中华,马维光,赵延霆..提升多次反射腔增强拉曼气体检测灵敏度[J].光学精密工程,2025,33(11):1691-1699,9.基金项目
国家自然科学基金项目资助项目(No.12274272) （No.12274272）
