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Proceedings Paper

Standoff handheld real-time early warning detector (SHREWD)
Author(s): Joseph M. Fukumoto; David G. Lim; David B. Cohn; Jay A. Fox; Cynthia R. Swim
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Paper Abstract

A lightweight, compact sensor breadboard demonstrator is being developed that will be capable of detecting chemical agents in the 8 - 12 micrometers band by DIAL for ranges on the order of 4 km. Engineering analysis shows that the overall sensor size and weight would be approximately 1 cu. ft. and 35 lbs., respectively. The sensor is composed of a 12.5 cm diameter, off-axis paraboloid receive telescope and a 300 Hz repetition rate solid-state laser transmitter. The transmitter is based on a diode-pumped, 1.06 micrometers laser with an output energy of 20 mJ and two cascaded OPO stages that shift the laser wavelength to the far IR bands. The first stage OPO is configured in an arrangement that shifts the laser output to beyond 2 micrometers . The second stage OPO completes the shift to the 8 - 12 micrometers band, giving an overall 1.06 (mu) $m yields 8 - 12 micrometers conversion efficiency of 2% and a sensor output power of 0.1 W.

Paper Details

Date Published: 28 July 2000
PDF: 5 pages
Proc. SPIE 4036, Chemical and Biological Sensing, (28 July 2000); doi: 10.1117/12.394067
Show Author Affiliations
Joseph M. Fukumoto, Raytheon Co. (United States)
David G. Lim, Raytheon Co. (United States)
David B. Cohn, Raytheon Co. (United States)
Jay A. Fox, U.S. Army Night Vision and Electronic Sensors Directorate (United States)
Cynthia R. Swim, U.S. Army Soldier and Biological Chemical Command (United States)


Published in SPIE Proceedings Vol. 4036:
Chemical and Biological Sensing
Patrick J. Gardner, Editor(s)

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