Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 100, Issue 1, Pages 173-180Publisher
SPRINGER
DOI: 10.1007/s00340-010-3975-0
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Funding
- National Science Foundation ERC MIRTHE award
- Welch Foundation [C-0586]
- Defense Advanced Research Projects Agency's Strategic Technology Office (STO) [HR0011-09-C-0049]
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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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