Frequency-Agile Bandpass Filter for Direct Detection Lidar Receivers
Applied Optics, Vol. 37, Issue 36, pp. 8327-8335 (1998)
http://dx.doi.org/10.1364/AO.37.008327
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Abstract
We discuss 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 into 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 results in a projected factor of a 2–7 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 systems to monitor chemical releases from long standoff distances.
© 1998 Optical Society of America
[Optical Society of America ]
OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(010.3640) Atmospheric and oceanic optics : Lidar
(040.3060) Detectors : Infrared
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
Citation
Christopher M. Gittins, William G. Lawrence, and William J. Marinelli, "Frequency-Agile Bandpass Filter for Direct Detection Lidar Receivers," Appl. Opt. 37, 8327-8335 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-36-8327
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