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Proceedings Paper

Laser radar for wide-area fire detection
Author(s): Alphonsus John Fennelly; Edward L. Fry; Muamer Zukic; Michele M. Wilson; Douglas G. Torr
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Paper Abstract

A Lidar system designed by the authors to detect and observe the tracks of effluents emitted by ships at sea under propulsion by combustion of fossil fuels could have many useful applications. A prototype system uses a frequency-doubled Nd:YAG laser as the transmitter, at wavelengths of 0.53 and 1.06 micrometers , and examine the return for Rayleigh, Mie, fluorescence, and Raman scattering (hence called Advanced Rayleigh-Raman-Mie, ARRM), to determine thermodynamic and chemical conditions out to a given distance surrounding the Lidar operating station. We discuss the business potential of the system, its application to a number of technical and environmental problems, the potential for job creation by the use of such systems, and their value to both the users and the rest of society. One such application is discussed to a limited extent: wide-area surveillance for fire detection, in both urban and rural applications. Conversations with the City of Huntsville's Fire Department have revealed that the system is a quantum leap in fire detection, reporting, and hence firefighting response. Constant motion through the sky of a beam of green light could be a public nuisance. Therefore in an urban setting use of a primary surveillance transmitter consisting of a frequency-doubled CO2 laser is necessary for initial detection of the thermodynamic and fluid-dynamic indications of the rising plume, from the Mie and Rayleigh scattering. After each detection of a new plume, the system switches to the Nd:YAG transmitter for detailed characterization of the plume from the measured ARRM parameters.

Paper Details

Date Published: 23 September 1994
PDF: 16 pages
Proc. SPIE 2271, Industrial Applications of Laser Radar, (23 September 1994); doi: 10.1117/12.188152
Show Author Affiliations
Alphonsus John Fennelly, Sentel Corp. (United States)
Edward L. Fry, Sentel Corp. (United States)
Muamer Zukic, Univ. of Alabama in Huntsville (United States)
Michele M. Wilson, Advanced Optical Systems (United States)
Douglas G. Torr, Univ. of Alabama in Huntsville (United States)


Published in SPIE Proceedings Vol. 2271:
Industrial Applications of Laser Radar
Gary W. Kamerman; William E. Keicher, Editor(s)

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