15 September 2004 Development principles of frequency-modulated CW-ladar for remote detection of atmospheric trace constituents
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Abstract
In this paper we present a general methodology for a frequency-modulated ladar/lidar (CW-FM-ladar/lidar) concept based on principles of both CW-FM-range-finding and modulation spectroscopy, together with modern techniques of optical signal transmission using tunable laser diodes, signal detection and heterodyne processing. We develop a mathematical description of trace gas detection using CW-LD ladar developing the relationship between the heterodyne echo-signal amplitudes and frequencies and trace gas concentration for each range. In particular, precise range and gas retrieval resolution limits based on the transmitting signal modulation and absorption line parameters are obtained.
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Ravil R. Agishev, Ravil R. Agishev, Rafael K. Sagdiev, Rafael K. Sagdiev, Barry Gross, Barry Gross, Fred Moshary, Fred Moshary, Alexander Gilerson, Alexander Gilerson, Samir Ahmed, Samir Ahmed, Adolfo Comeron, Adolfo Comeron, } "Development principles of frequency-modulated CW-ladar for remote detection of atmospheric trace constituents", Proc. SPIE 5547, Remote Sensing in Atmospheric Pollution Monitoring and Control, (15 September 2004); doi: 10.1117/12.560102; https://doi.org/10.1117/12.560102
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