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Proceedings Paper

Frequency-agile bandpass filter for direct detection lidar receivers
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Paper Abstract

This paper discusses the development of a frequency agile receiver for CO2 laser based differential absorption lidar (DIAL) systems. The receiver is based on the insertion of a low-order tunable etalon into the detector field of view. The incorporation of the etalon in the receiver reduces system noise by decreasing the instantaneous spectral bandwidth of the IR detector to a narrow wavelength range centered on the transmitted CO2 laser line, thereby improving the overall D* of the detection system. A consideration of overall lidar system performance result in a projected factor of 2 to 7 reduction in detector system noise, depending on the characteristics of the environment being probed. These improvements can play a key role in extending the ability of DIAL to monitor chemical releases form long standoff distances.

Paper Details

Date Published: 18 January 1999
PDF: 10 pages
Proc. SPIE 3533, Air Monitoring and Detection of Chemical and Biological Agents, (18 January 1999); doi: 10.1117/12.336853
Show Author Affiliations
William J. Marinelli, Physical Sciences Inc. (United States)
Christopher M. Gittins, Physical Sciences Inc. (United States)
William G. Lawrence, Physical Sciences Inc. (United States)


Published in SPIE Proceedings Vol. 3533:
Air Monitoring and Detection of Chemical and Biological Agents
Joseph Leonelli; Mark L.G. Althouse, Editor(s)

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