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Imaging stand-off detection of explosives using tunable MIR quantum cascade lasers

 
: Fuchs, F.; Hinkov, B.; Hugger, S.; Kaster, J.M.; Aidam, R.; Bronner, W.; Köhler, K.; Yang, Q.; Rademacher, S.; Degreif, K.; Schnürer, F.; Schweikert, W.

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Razeghi, M. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Quantum sensing and nanophotonic devices VII : 24-28 January 2010, San Francisco, California, United States
Bellingham, WA: SPIE, 2010 (Proceedings of SPIE 7608)
ISBN: 978-0-8194-8004-0
Paper 760809
Conference "Quantum Sensing and Nanophotonic Devices" <7, 2010, San Francisco/Calif.>
Englisch
Konferenzbeitrag
Fraunhofer IAF ()
Fraunhofer IPM ()
Fraunhofer ICT ()
CBRNE detection; infrared spectroscopy; stand-off detection; remote sensing; infrared laser; quantum cascade laser; external cavity laser

Abstract
Results on the detection of traces of trinitrotoluene (TNT) on different substrate-materials like Aluminum and standard car paint are presented. We investigated different samples with a movable imaging standoff detection system at angles of incidence far away from specular reflection. The samples were illuminated with a tunable mid-infrared external-cavity quantum cascade laser. For collection of the diffusely backscattered light a highperformance infrared imager was used. Trace concentrations of TNT corresponding to fingerprints on realworld- substrates were detected, while false alarms of cross-contaminations were successfully suppressed.

: http://publica.fraunhofer.de/dokumente/N-131657.html