Explosive detection using infrared laser spectroscopy

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

doi:10.1117/12.808976

26 January 2009 Explosive detection using infrared laser spectroscopy

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

Proceedings Volume 7222, Quantum Sensing and Nanophotonic Devices VI; 72220B (2009) https://doi.org/10.1117/12.808976
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

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.

Citation Download 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 (26 January 2009); https://doi.org/10.1117/12.808976

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