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Broadband tunable external cavity quantum cascade lasers for standoff detection of explosives

: Hugger, S.; Fuchs, F.; Jarvis, J.P.; Kinzer, M.; Yang, Q.K.; Bronner, W.; Driad, R.; Aidam, R.; Degreif, K.; Schnürer, F.

Fulltext urn:nbn:de:0011-n-2143415 (1.8 MByte PDF)
MD5 Fingerprint: c732400dc2688d5da9202737405af634
Copyright 2012 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Created on: 15.8.2013

George, T. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Micro- and nanotechnology sensors, systems, and applications IV : Part of SPIE Defense, Security + Sensing, 23 - 27 April 2012, Baltimore, Maryland, United States
Bellingham, WA: SPIE, 2012 (SPIE Proceedings 8373)
ISBN: 978-0-8194-9051-3
ISSN: 0038-7355
Paper 83732G
Conference on Micro- and Nanotechnology Sensors, Systems, and Applications <4, 2012, Baltimore/Md.>
Exhibition Defense, Security, and Sensing <2012, Baltimore/Md.>
Conference Paper, Electronic Publication
Fraunhofer IAF ()

We demonstrate contactless detection of solid residues of explosives using mid-infrared laser spectroscopy. Our detection scheme relies on active laser illumination, synchronized with the collection of the backscattered radiation by an infrared camera. The key component of the system is an external cavity quantum cascade laser with a tuning range of 300 cm(-1) centered at 1220 cm(-1). Residues of TNT (trinitrotoluene), PETN (pentaerythritol tetranitrate) and RDX (cyclotrimethylenetrinitramine) could be identified and discriminated against non-hazardous materials by scanning the illumination wavelength over several of the characteristic absorption features of the explosives.