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Proceedings Paper

Standoff detection using coherent backscattered spectroscopy
Author(s): Alexander W. Schill; Bradley R. Arnold; Lisa A. Kelly; Paul M. Pellegrino
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Paper 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.

Paper Details

Date Published: 26 April 2007
PDF: 8 pages
Proc. SPIE 6554, Chemical and Biological Sensing VIII, 65540G (26 April 2007); doi: 10.1117/12.722309
Show Author Affiliations
Alexander W. Schill, Army Research Lab. (United States)
Bradley R. Arnold, Univ. of Maryland, Baltimore County (United States)
Lisa A. Kelly, Univ. of Maryland, Baltimore County (United States)
Paul M. Pellegrino, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 6554:
Chemical and Biological Sensing VIII
Augustus W. Fountain III, Editor(s)

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