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Proceedings Paper

Analysis of compound parabolic concentrators and aperture averaging to mitigate fading on free-space optical links
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Paper Abstract

Free space optics (FSO) is one solution to the bandwidth bottleneck resulting from increased demand for broadband access. It is well known that atmospheric turbulence distorts the wavefront of a laser beam propagating through the atmosphere. This research investigates methods of reducing the effects of intensity scintillation and beam wander on the performance of free space optical communication systems, by characterizing system enhancement using either aperture averaging techniques or nonimaging optics. Compound Parabolic Concentrators, nonimaging optics made famous by Winston and Welford, are inexpensive elements that may be easily integrated into intensity modulation-direct detection receivers to reduce fading caused by beam wander and spot breakup in the focal plane. Aperture averaging provides a methodology to show the improvement of a given receiver aperture diameter in averaging out the optical scintillations over the received wavefront.

Paper Details

Date Published: 27 January 2004
PDF: 10 pages
Proc. SPIE 5160, Free-Space Laser Communication and Active Laser Illumination III, (27 January 2004); doi: 10.1117/12.506972
Show Author Affiliations
Linda M. Wasiczko, Univ. of Maryland/College Park (United States)
Igor I. Smolyaninov, Univ. of Maryland/College Park (United States)
Christopher C. Davis, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 5160:
Free-Space Laser Communication and Active Laser Illumination III
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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