A Mid-infrared QEPAS sensor device for TATP detection

Recent developments of external cavity quantum cascade lasers (EC-QC lasers) enable new applications in laser spectroscopy of trace gas species in the mid-infrared spectral region. We report the application of quartz enhanced photo acoustic spectroscopy (QEPAS) with widely tuneable EC-QC lasers as e...

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Bibliographic Details
Published in:Journal of physics. Conference series 2009-03, Vol.157 (1), p.012002
Main Authors: Bauer, C, Willer, U, Lewicki, R, Pohlkötter, A, Kosterev, A, Kosynkin, D, Tittel, F K, Schade, W
Format: Article
Language:English
Subjects:
Explosives detection
Infrared detectors
Infrared spectra
Lasers
Physics
Quantum cascade lasers
Spectroscopy
Spectrum analysis
Trace gases
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Summary:Recent developments of external cavity quantum cascade lasers (EC-QC lasers) enable new applications in laser spectroscopy of trace gas species in the mid-infrared spectral region. We report the application of quartz enhanced photo acoustic spectroscopy (QEPAS) with widely tuneable EC-QC lasers as excitation sources for chemical sensing of different species such as triacetone triperoxide (TATP). A pulsed EC-QC laser operating at v∼1120cm-1 and a cw EC-QC laser operating at v∼950cm-1 are used for the detection of the explosive TATP which is a mid infrared broad band absorber. The detection limit of our present setup is ∼1ppm TATP at atmospheric pressure.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/157/1/012002