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Trace gas sensor based on quartz tuning fork enhanced laser photoacoustic spectroscopy |
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| Authors: | K Liu J Li L Wang T Tan W Zhang X Gao W Chen and F K Tittel |
| Institution: | (1) Environmental Spectroscopy Laboratory, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, People Republic of China;(2) Laboratoire de Physicochimie de l’Atmosphère, CNRS UMR 8101, Université du Littoral C?te d’Opale, 189A, Av. Maurice Schumann, 59140 Dunkerque, France;(3) Rice Quantum Institute, MS 366, Rice University, 6100 Main St., Houston, TX 77005, USA |
| Abstract: | A compact photoacoustic gas sensor based on a quartz tuning fork and fiber-coupled distributed feedback (DFB) diode laser for detection of trace gas at atmospheric pressure has been developed. The sensor performance was evaluated by detection of water vapor in ambient air at normal atmospheric pressure. A normalized noise equivalent absorption coefficient of 1.68×10−8 cm−1 W/Hz1/2 was achieved. Influence of different acoustic microresonators and sample pressure on the sensor performance, and the characterization of the sensor response time were investigated. Approaches to improve the current sensor performance are discussed. |
| Keywords: | PACS" target="_blank">PACS 42 55 Px 42 62 Fi 43 35 Sx |
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