title: Planar Laser-Based QEPAS Trace Gas Sensor.
abstract: A novel quartz enhanced photoacoustic spectroscopy (QEPAS) trace gas detection scheme is reported in this paper. A cylindrical lens was employed for near-infrared laser focusing. The laser beam was shaped as a planar line laser between the gap of the quartz tuning fork (QTF) prongs. Compared with a spherical lens-based QEPAS sensor, the cylindrical lens-based QEPAS sensor has the advantages of easier laser beam alignment and a reduction of stringent stability requirements. Therefore, the reported approach is useful in long-term and continuous sensor operation.
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. hearkenyi@163.com.
authors.forename: Ying
authors.initials: Y
authors.lastname: He
authors.affiliation: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. chen_cheng0825@163.com.
authors.forename: Cheng
authors.initials: C
authors.lastname: Chen
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: 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. pengjiangbo_2004@126.com.
authors.forename: Jiangbo
authors.initials: J
authors.lastname: Peng
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
keywords: H2O quantification; QEPAS; cylindrical lens; planar laser