Comparison of performance capabilities of spread spectrum coherent and direct detection CO2 DIAL systems and associated hardware fielding implications

Victor H. Hasson; Gordon L. Dryden

doi:10.1117/12.476408

29 July 2002 Comparison of performance capabilities of spread spectrum coherent and direct detection CO₂ DIAL systems and associated hardware fielding implications

Victor H. Hasson, Gordon L. Dryden

Author Affiliations +

Proceedings Volume 4723, Laser Radar Technology and Applications VII; (2002) https://doi.org/10.1117/12.476408
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

This paper reviews the performance of a conventional direct detection CO₂ Differential Absorption Lidar (DIAL) system with the coherent spread spectrum approach developed, validated 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. Performance parameter maps are presented for ground-based, low-altitude and high-altitude airborne systems with a range of aperture sizes and pulse formats.

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Victor H. Hasson and Gordon L. Dryden "Comparison of performance capabilities of spread spectrum coherent and direct detection CO₂ DIAL systems and associated hardware fielding implications", Proc. SPIE 4723, Laser Radar Technology and Applications VII, (29 July 2002); https://doi.org/10.1117/12.476408

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