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Explosive detection using infrared laser spectroscopy

: Hildenbrand, J.; Herbst, J.; Wöllenstein, J.; Lambrecht, A.

Preprint urn:nbn:de:0011-n-941050 (936 KByte PDF)
MD5 Fingerprint: b1637c27bbbdec0a77fd2dff45e87aa8
Erstellt am: 15.5.2009

Razeghi, M. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Quantum sensing and nanophotonic devices VI : 25 - 28 January 2009, San Jose, California, USA
Bellingham, WA: SPIE, 2009 (Proceedings of SPIE 7222)
ISBN: 978-0-8194-7468-1
Paper 72220B
Conference "Quantum Sensing and Nanophotonic Devices" <6, 2009, San Jose/Calif.>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IPM ()
MIR laser spectroscopy; QCL; explosive detection; stand-off-detection; open path

Stand-off and extractive explosive detection methods for short distances are investigated using mid-infrared laser spectroscopy. A quantum cascade laser (QCL) system for TATP-detection by open path absorption spectroscopy in the gas phase was developed. In laboratory measurements a detection limit of 5 ppm*m was achieved. For explosives with lower vapor pressure an extractive hollow fiber based measurement system was investigated. By thermal desorption gaseous TATP or TNT is introduced into a heated fiber. The small sample volume and a fast gas exchange rate enable fast detection. TNT and TATP detection levels below 100 ng are feasible even in samples with a realistic contaminant background.