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Proceedings Article

Explosive detection using infrared laser spectroscopy

[+] Author Affiliations
J. Hildenbrand, J. Herbst, J. Wöllenstein, A. Lambrecht

Fraunhofer Institute for Physical Measurement Techniques (Germany)

Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220B (January 26, 2009); doi:10.1117/12.808976
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From Conference Volume 7222

  • Quantum Sensing and Nanophotonic Devices VI
  • Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown
  • San Jose, CA | January 24, 2009

abstract

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.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

J. Hildenbrand ; J. Herbst ; J. Wöllenstein and A. Lambrecht
"Explosive detection using infrared laser spectroscopy", Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220B (January 26, 2009); doi:10.1117/12.808976; http://dx.doi.org/10.1117/12.808976


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