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Proceedings Paper

Mid- infrared semiconductor laser based trace gas sensor technologies for environmental monitoring and industrial process control
Author(s): Rafał Lewicki; Mohammad Jahjah; Yufei Ma; Frank K. Tittel; Przemyslaw Stefanski; Jan Tarka
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Paper Abstract

Recent advances in the development of compact sensors based on mid-infrared continuous wave (CW), thermoelectrically cooled (TEC) and room temperature operated quantum cascade lasers (QCLs) for the detection, quantification and monitoring of trace gas species and their applications in environmental and industrial process analysis will be reported. These sensors employ a 2f wavelength modulation (WM) technique based on quartz enhanced photoacoustic spectroscopy (QEPAS) that achieves detection sensitivity at the ppb and sub ppb concentration levels. The merits of QEPAS include an ultra-compact, rugged sensing module, with wide dynamic range and immunity to environmental acoustic noise. QCLs are convenient QEPAS excitation sources that permit the targeting of strong fundamental rotational-vibrational transitions which are one to two orders of magnitude more intense in the mid-infrared than overtone transitions in the near infrared spectral region.

Paper Details

Date Published: 4 February 2013
PDF: 10 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310W (4 February 2013); doi: 10.1117/12.2008701
Show Author Affiliations
Rafał Lewicki, Rice Univ. (United States)
Mohammad Jahjah, Rice Univ. (United States)
Yufei Ma, Rice Univ. (United States)
Frank K. Tittel, Rice Univ. (United States)
Przemyslaw Stefanski, Wroclaw Univ. of Technology (Poland)
Jan Tarka, Wroclaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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