29 January 2002 Comparison of performance capabilities of spread spectrum coherent and direct detection CO2 DIAL systems
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Abstract
This paper compares the performance of a conventional direct detection CO2 Differential Absorption Lidar (DIAL) system with the coherent spread spectrum approach developed and patented by Textron. The analysis shows that the coherent approach is far superior in terms of maximum attainable standoff range at a specified transmitter average power and substantially reduced system power and associated size and weight at a predetermined range. The requirements on local oscillator stability are fairly relaxed and the spread spectrum/coherent DIAL concept is fairly easy to implement. Some comparative validation data are provided.
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Victor H. Hasson, Victor H. Hasson, Mark A. Kovacs, Mark A. Kovacs, } "Comparison of performance capabilities of spread spectrum coherent and direct detection CO2 DIAL systems", Proc. SPIE 4538, Optics in Atmospheric Propagation and Adaptive Systems IV, (29 January 2002); doi: 10.1117/12.454417; https://doi.org/10.1117/12.454417
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