Comparison of probability density functions for aperture-averaged irradiance fluctuations of a Gaussian beam with beam wander

Applied Optics
Melissa BeasonLarry Andrews

Abstract

Over the years, there has been much interest in the use of optical wavelengths for communication because of the potential for high data rates. However, the performance of these systems can become significantly degraded due to turbulence-induced signal fluctuations. These fluctuations can be minimized by enlarging the receiving aperture, thereby averaging the fluctuations. There is extensive interest in developing probability density functions (PDFs) describing these intensity fluctuations so as to accurately predict system performance. This work examines several PDF models that have been suggested to represent fluctuations by comparing them to simulations of realistic propagation scenarios of a collimated Gaussian beam with centroid wander. Unlike with an infinite plane or spherical wave, the empirical PDF shape in these simulations changed significantly with increased aperture, going from a positively skewed to a negatively skewed distribution; therefore, the PDF model that describes it also must change. This change in skew can have serious consequences on the metrics of an optical communication system, e.g., number of fades and bit-error rate. In this work, we examine the evolution of the empirical PDF with aperture size and ...Continue Reading

Citations

Mar 18, 2021·Optics Express·James OsbornRamon Mata Calvo
Apr 3, 2021·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Yalçın Ata, Olga Korotkova

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