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Proceedings Paper

A free-space optical terminal for fading channels
Author(s): T. Williams; R. J. Murphy; F. Walther; A. Volpicelli; B. Wilcox; D. Crucioli
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Paper Abstract

This paper describes a lasercom terminal using spatial diversity to mitigate fading caused by atmospheric scintillation. Multiple receive apertures are separated sufficiently to capture statistically independent samples of the incoming beam. The received optical signals are tracked individually, photo-detected, and summed electrically, with measured diversity gain. The terminal consists of COTS components. It was used in successful demonstrations over a 5.4km ground-ground link from June through September 2008, during which it experienced a wide temperature range. Design overview and hardware realization are presented. This work was sponsored by the Department of Defense, RRCO DDR&E, under Air Force Contract FA8721-05-C-0002. Opinions, interpretations, conclusions and recommendations are those of the authors and are not necessarily endorsed by the United States Government.

Paper Details

Date Published: 21 August 2009
PDF: 7 pages
Proc. SPIE 7464, Free-Space Laser Communications IX, 74640W (21 August 2009); doi: 10.1117/12.826285
Show Author Affiliations
T. Williams, MIT Lincoln Lab. (United States)
R. J. Murphy, MIT Lincoln Lab. (United States)
F. Walther, MIT Lincoln Lab. (United States)
A. Volpicelli, MIT Lincoln Lab. (United States)
B. Wilcox, MIT Lincoln Lab. (United States)
D. Crucioli, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 7464:
Free-Space Laser Communications IX
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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