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Proceedings Paper

Detection Efficiency For Large-Aperture Coherent Laser Radars
Author(s): J. Carl Leader
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Paper Abstract

The heterodyne detection efficiency of a large-aperture, coherent laser radar, defined as the actual signal-to-noise ratio (SNR) divided by the ideal SNR, is derived for detected phase-front distortions resulting from atmospheric turbulence or diffuse target scattering. Specific expressions are developed for a general target reflectivity distribution and a receiver having a finite-detection aperture, local-oscillator aperture, and local-oscillator beam. Numerical calculations of the heterodyne efficiency (using the derived expressions) show the reduction in heterodyne detection-efficiency resulting from atmospheric turbulence, near-field effects, and target speckle.

Paper Details

Date Published: 30 April 1982
PDF: 12 pages
Proc. SPIE 0300, Physics and Technology of Coherent Infrared Radar I, (30 April 1982); doi: 10.1117/12.932579
Show Author Affiliations
J. Carl Leader, McDonnell Douglas Research Laboratories (United States)

Published in SPIE Proceedings Vol. 0300:
Physics and Technology of Coherent Infrared Radar I
Robert C. Harney, Editor(s)

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