光声光谱学
甲烷
材料科学
时滞与积分
灵敏度(控制系统)
光谱学
光热治疗
光纤传感器
光纤
光电子学
光学
电子工程
激光器
纳米技术
化学
工程类
物理
有机化学
量子力学
作者
Chuantao Zheng,Lien Hu,Kaiyuan Zheng,Fang Song,Yiding Wang,Xiuying Li
标识
DOI:10.1109/ogc52961.2021.9654397
摘要
Gas sensors are important for multiple application scenarios, such as chemical substance detection and environmental pollution monitoring. The developments of quartz tuning fork (QTF) based quartz-enhanced photoacoustic and photothermal spectroscopy (QEPAS/QEPTS) in our research group was reported. With respect to QEPAS, a novel QTF-embedded off-beam QEPAS (E-OB-QEPAS) spectrophone configuration was used to improve sensitivity and the strength of acoustic coupling, and decrease the difficulty in assembly process and alignment process. Based on E-OB-QEPAS spectrophone, a sensitive methane sensor system and a double-gas methane/acetylene sensor system were developed. With respect to QEPTS, an all-fiber QEPTS configuration was used to solve the problems of huge size, optical light path alignment and integration process in free-space QEPTS. Then, a wavelength-locked QEPTS-based methane sensor system was proposed by utilizing a fiber-coupled sensing probe for long-distance in-situ gas sensing. At last, a double spot-ring Herriott-cell was used to realize a wide detection range and high detection sensitivity simultaneously in QEPTS-based gas sensor system.
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