QEPAS detector for rapid spectral measurements |
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| Authors: | A A Kosterev P R Buerki L Dong M Reed T Day F K Tittel |
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| Institution: | 1. Department of Electrical and Computer Engineering, Rice University, MS-366, 6100 Main Street, Houston, TX, 77251, USA
2. Daylight Solutions, Inc., 13029 Danielson Street, Suite 130, Poway, CA, 92064, USA
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| Abstract: | A quartz enhanced photoacoustic spectroscopy sensor designed for fast response was used in combination with a pulsed external
cavity quantum cascade laser to rapidly acquire gas absorption data over the 1196–1281 cm−1 spectral range. The system was used to measure concentrations of water vapor, pentafluoroethane (freon-125), acetone, and
ethanol both individually and in combined mixtures. The precision achieved for freon-125 concentration in a single 1.1 s long
spectral scan is 13 ppbv. |
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