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Proceedings Paper

Low-power ultraviolet lidar for standoff detection of BW agents
Author(s): Coorg R. Prasad; Wen Huang; Jack Bufton; Alexander Achey; Jeffrey Dawson; Robert M. Serino; Wenhui Shi
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Paper Abstract

A compact ultraviolet lidar stand-off sensor was recently developed and field-tested for detection of bio warfare (BW) agent stimulant aerosols and interferents. It employed a low-power (~5mW), continuous-wave, 375nm semiconductor ultraviolet optical source (SUVOS) laser diode that was modulated at high-speed with a pseudo-random (PR) code to provide range-resolved lidar detection of both aerosol elastic scattering and fluorescence. The sensor incorporated a 150mm diameter receiver telescope and 3 photon-counting detection channels centered at 375nm, 440nm, and 550nm. Aerosol elastic and fluorescence lidar profiles were obtained by correlating the signal photon-counts with the PR code. Tests of the lidar were performed first with simulants released in the Large Aerosol Chamber at Edgewood Chemical and Biological Center, MD at a lidar range of only 7.5m. The second phase of testing was done at Dugway Proving Ground, UT. Here the lidar was continuously scanned (± 13°) in a horizontal plane to detect downwind simulant and interferent aerosol disseminations at ranges of several hundred meters. Preliminary analyses of these tests show that the lidar detected fluorescence from the BW simulants at ranges up to 100m, and elastic scattering from aerosols up to 350m.

Paper Details

Date Published: 13 August 2004
PDF: 10 pages
Proc. SPIE 5416, Chemical and Biological Sensing V, (13 August 2004); doi: 10.1117/12.546762
Show Author Affiliations
Coorg R. Prasad, Science and Engineering Services, Inc. (United States)
Wen Huang, Science and Engineering Services, Inc. (United States)
Jack Bufton, Science and Engineering Services, Inc. (United States)
Alexander Achey, Science and Engineering Services, Inc. (United States)
Jeffrey Dawson, Science and Engineering Services, Inc. (United States)
Robert M. Serino, Science and Engineering Services, Inc. (United States)
Wenhui Shi, Science and Engineering Services, Inc. (United States)


Published in SPIE Proceedings Vol. 5416:
Chemical and Biological Sensing V
Patrick J. Gardner, Editor(s)

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