title: Impact of Humidity on Quartz-Enhanced Photoacoustic Spectroscopy Based CO Detection Using a Near-IR Telecommunication Diode Laser.
abstract: A near-IR CO trace gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is evaluated using humidified nitrogen samples. Relaxation processes in the CO-N2-H2O system are investigated. A simple kinetic model is used to predict the sensor performance at different gas pressures. The results show that CO has a ~3 and ~5 times slower relaxation time constant than CH4 and HCN, respectively, under dry conditions. However, with the presence of water, its relaxation time constant can be improved by three orders of magnitude. The experimentally determined normalized detection sensitivity for CO in humid gas is 1.556 × 10(-8) W ⋅ cm (-1)/Hz(1/2).
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. yinxkvip@163.com.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. yinxkvip@163.com.|State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, China. yinxkvip@163.com.
authors.forename: Xukun
authors.initials: X
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. donglei@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. donglei@sxu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Dong
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. zhenghuadan@126.com.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. zhenghuadan@126.com.
authors.forename: Huadan
authors.initials: H
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. liuxiaoli@163.com.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. liuxiaoli@163.com.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. beijing2008whp@163.com.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. beijing2008whp@163.com.
authors.forename: Hongpeng
authors.initials: H
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. 15735176489@163.com.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. 15735176489@163.com.
authors.forename: Yanfang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. mwg@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. mwg@sxu.edu.cn.
authors.forename: Weiguang
authors.initials: W
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. k1226@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. k1226@sxu.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. ywb65@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. ywb65@sxu.edu.cn.
authors.forename: Wangbao
authors.initials: W
authors.lastname: Yin
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. xlt@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. xlt@sxu.edu.cn.
authors.forename: Liantuan
authors.initials: L
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China. tjia@sxu.edu.cn.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. tjia@sxu.edu.cn.
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia
keywords: carbon monoxide; near-IR telecommunication diode laser; quartz enhanced photoacoustic spectroscopy; vibrational-to-translational (V–T) relaxation
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