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4 February 2013 Broadband-tunable external-cavity quantum cascade lasers for the spectroscopic detection of hazardous substances
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Abstract
Broadband tunable external cavity quantum cascade lasers (EC-QCL) have emerged as attractive light sources for midinfrared (MIR) “finger print” molecular spectroscopy for detection and identification of chemical compounds. Here we report on the use of EC-QCL for the spectroscopic detection of hazardous substances, using stand-off detection of explosives and sensing of hazardous substances in water as two prototypical examples. Our standoff-system allows the contactless identification of solid residues of various common explosives over distances of several meters. Furthermore, results on an EC-QCL-based setup for MIR absorption spectroscopy on liquids are presented, featuring a by a factor of ten larger single-pass optical path length of 100 μm as compared to conventional Fourier transform infrared spectroscopy instrumentations.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Hugger, F. Fuchs, J. Jarvis, M. Kinzer, Q. K. Yang, R. Driad, R. Aidam, and J. Wagner "Broadband-tunable external-cavity quantum cascade lasers for the spectroscopic detection of hazardous substances", Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86312I (4 February 2013); https://doi.org/10.1117/12.2008880
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