Reciprocity-enhanced optical communication through atmospheric turbulence - part II: communication architectures and performance

Andrew L. Puryear; Jeffrey H. Shapiro; Ronald R. Parenti

doi:10.1117/12.930959

24 October 2012 Reciprocity-enhanced optical communication through atmospheric turbulence - part II: communication architectures and performance

Andrew L. Puryear, Jeffrey H. Shapiro, Ronald R. Parenti

Author Affiliations +

Proceedings Volume 8517, Laser Communication and Propagation through the Atmosphere and Oceans; 85170N (2012) https://doi.org/10.1117/12.930959
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Free-space optical communication provides rapidly deployable, dynamic communication links that are capable of very high data rates compared with those of radio-frequency systems. As such, free-space optical communication is ideal for mobile platforms, for platforms that require the additional security afforded by the narrow divergence of a laser beam, and for systems that must be deployed in a relatively short time frame. In clear-weather conditions the data rate and utility of free-space optical communication links are primarily limited by fading caused by micro-scale atmospheric temperature variations that create parts-per-million refractive-index fluctuations known as atmospheric turbulence. Typical communication techniques to overcome turbulence-induced fading, such as interleavers with sophisticated codes, lose viability as the data rate is driven higher or the delay requirement is driven lower. This paper, along with its companion [J. H. Shapiro and A. Puryear, “Reciprocity-Enhanced Optical Communication through Atmospheric Turbulence–Part I: Reciprocity Proofs and Far-Field Power Transfer”], present communication systems and techniques that exploit atmospheric reciprocity to overcome turbulence which are viable for high data rate and low delay requirement systems. Part I proves that reciprocity is exhibited under rather general conditions, and derives the optimal power-transfer phase compensation for far-field operation. The Part II paper presents capacity-achieving architectures that exploit reciprocity to overcome the complexity and delay issues that limit state-of-the art free-space optical communications. Further, this paper uses theoretical turbulence models to determine the performance—delay, throughput, and complexity—of the proposed architectures.

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Andrew L. Puryear, Jeffrey H. Shapiro, and Ronald R. Parenti "Reciprocity-enhanced optical communication through atmospheric turbulence - part II: communication architectures and performance", Proc. SPIE 8517, Laser Communication and Propagation through the Atmosphere and Oceans, 85170N (24 October 2012); https://doi.org/10.1117/12.930959

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