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

Linda M. Wasiczko; Igor I. Smolyaninov; Christopher C. Davis

doi:10.1117/12.506972

27 January 2004 Analysis of compound parabolic concentrators and aperture averaging to mitigate fading on free-space optical links

Linda M. Wasiczko, Igor I. Smolyaninov, Christopher C. Davis

Author Affiliations +

Proceedings Volume 5160, Free-Space Laser Communication and Active Laser Illumination III; (2004) https://doi.org/10.1117/12.506972
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Linda M. Wasiczko, Igor I. Smolyaninov, and Christopher C. Davis "Analysis of compound parabolic concentrators and aperture averaging to mitigate fading on free-space optical links", Proc. SPIE 5160, Free-Space Laser Communication and Active Laser Illumination III, (27 January 2004); https://doi.org/10.1117/12.506972

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