Next Article in Journal
Microsoft Kinect Visual and Depth Sensors for Breathing and Heart Rate Analysis
Next Article in Special Issue
Spectral Characterization of a Prototype SFA Camera for Joint Visible and NIR Acquisition
Previous Article in Journal
A Three-Dimensional Shape-Based Force and Stiffness-Sensing Platform for Tendon-Driven Catheters
Previous Article in Special Issue
Nondestructive Evaluation of Carbon Fiber Reinforced Polymer Composites Using Reflective Terahertz Imaging
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(7), 989;

Planar Laser-Based QEPAS Trace Gas Sensor

National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
Post-doctoral Mobile Station of Power Engineering and Engineering Thermophysics, Harbin Institute of Technology, Harbin 150001, China
Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA
Authors to whom correspondence should be addressed.
Academic Editor: Dragan Indjin
Received: 17 April 2016 / Revised: 22 June 2016 / Accepted: 23 June 2016 / Published: 28 June 2016
(This article belongs to the Special Issue Infrared and THz Sensing and Imaging)
Full-Text   |   PDF [2331 KB, uploaded 28 June 2016]   |  


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. View Full-Text
Keywords: QEPAS; cylindrical lens; planar laser; H2O quantification QEPAS; cylindrical lens; planar laser; H2O quantification

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Ma, Y.; He, Y.; Chen, C.; Yu, X.; Zhang, J.; Peng, J.; Sun, R.; Tittel, F.K. Planar Laser-Based QEPAS Trace Gas Sensor. Sensors 2016, 16, 989.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top