Standoff detection using coherent backscattered spectroscopy
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Author/Creator ORCID
Date
2007-04-26
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Citation of Original Publication
Alexander W. Schill, Alexander W. Schill, Bradley R. Arnold, Bradley R. Arnold, Lisa A. Kelly, Lisa A. Kelly, Paul M. Pellegrino, Paul M. Pellegrino, "Standoff detection using coherent backscattered spectroscopy", Proc. SPIE 6554, Chemical and Biological Sensing VIII, 65540G (26 April 2007); doi: 10.1117/12.722309; https://doi.org/10.1117/12.722309
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Abstract
Intense laser pulses may be used for standoff detection of energetic materials. Coherent backscattered
spectroscopy offers a tremendous advantage over other spectroscopic detection techniques in that it uses stimulated or
amplified spontaneous emission from the sample to produce a minimally divergent, directional beam back to the
detection platform. The characteristics of the backscattered beam depend largely on the intensity and pulse width of the
laser source as well as the concentration and photo-physical characteristics of the target molecule. Different target
molecules will exhibit different backscattered emission signals, allowing differential detection of energetic materials in
the vapor phase. Because of the highly directional nature of the coherent backscattered beam, detection limits in the
vapor of less than 1 ppm at ranges up to 100 meters can be anticipated.