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Proceedings Paper

Performance analysis of atmospheric field conjugation adaptive arrays
Author(s): Aniceto Belmonte; Joseph M. Kahn
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Paper Abstract

System configurations based on single monolithic-apertures that are immune to atmospheric fluctuations are being developed. Main goal is the improvement of the performance achievable in coherent, free-space optical communication systems using atmospheric compensation techniques such as adaptive optics. As an alternative to a single monolithic-aperture coherent receiver with a full-size collecting area, a large effective aperture can be achieved by combining the output signal from an array of smaller receivers. We study the communication performance of field conjugation adaptive arrays applied in synchronous laser communication through the turbulent atmosphere. We assume that a single information-bearing signal is transmitted over the atmospheric fading channel, and that the adaptive array coherent receiver combines multiple dependent replicas to improve detection efficiency. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise. We study the effect of various atmospheric parameters and the number of branches combined at the receiver.

Paper Details

Date Published: 21 February 2011
PDF: 9 pages
Proc. SPIE 7923, Free-Space Laser Communication Technologies XXIII, 79230Q (21 February 2011); doi: 10.1117/12.873056
Show Author Affiliations
Aniceto Belmonte, Technical Univ. of Catalonia (Spain)
Joseph M. Kahn, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 7923:
Free-Space Laser Communication Technologies XXIII
Hamid Hemmati, Editor(s)

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