4 February 2013 Mid- infrared semiconductor laser based trace gas sensor technologies for environmental monitoring and industrial process control
Author Affiliations +
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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rafał Lewicki, Rafał Lewicki, Mohammad Jahjah, Mohammad Jahjah, Yufei Ma, Yufei Ma, Frank K. Tittel, Frank K. Tittel, Przemyslaw Stefanski, Przemyslaw Stefanski, Jan Tarka, Jan Tarka, "Mid- infrared semiconductor laser based trace gas sensor technologies for environmental monitoring and industrial process control", Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310W (4 February 2013); doi: 10.1117/12.2008701; https://doi.org/10.1117/12.2008701
PROCEEDINGS
10 PAGES


SHARE
Back to Top