title: Quartz enhanced photoacoustic spectroscopy based trace gas sensors using different quartz tuning forks.
abstract: A sensitive trace gas sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) is reported. A 1.395 μm continuous wave (CW), distributed feedback pigtailed diode laser was used as the excitation source and H2O was selected as the target analyte. Two kinds of quartz tuning forks (QTFs) with a resonant frequency (f0) of 30.72 kHz and 38 kHz were employed for the first time as an acoustic wave transducer, respectively for QEPAS instead of a standard QTF with a f0 of 32.768 kHz. The QEPAS sensor performance using the three different QTFs was experimentally investigated and theoretically analyzed. A minimum detection limit of 5.9 ppmv and 4.3 ppmv was achieved for f0 of 32.768 kHz and 30.72 kHz, respectively.
authors.affiliation: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. mayufei926@163.com.|Post-doctoral Mobile Station of Power Engineering and Engineering Thermophysics, Harbin Institute of Technology, Harbin 150001, China. mayufei926@163.com.
authors.forename: Yufei
authors.initials: Y
authors.lastname: Ma
authors.affiliation: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. yuguang@hit.edu.cn.
authors.forename: Guang
authors.initials: G
authors.lastname: Yu
authors.affiliation: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. wozhenkule@sina.com.
authors.forename: Jingbo
authors.initials: J
authors.lastname: Zhang
authors.affiliation: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. yuxin0306@163.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Yu
authors.affiliation: Post-doctoral Mobile Station of Power Engineering and Engineering Thermophysics, Harbin Institute of Technology, Harbin 150001, China. sunsr@hit.edu.cn.
authors.forename: Rui
authors.initials: R
authors.lastname: Sun
authors.affiliation: Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA. fkt@rice.edu.
authors.forename: Frank K
authors.initials: FK
authors.lastname: Tittel
mesh_terms: D011791:Quartz; D013057:Spectrum Analysis / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D011791:Quartz
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