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Proceedings Paper

Acousto-optic modulator for emulating atmospheric fade in free-space optical communication systems
Author(s): Evan J. Katz; Yousef K. Chahine; Brian E. Vyhnalek; Sarah A. Tedder
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Paper Abstract

This report presents our model for atmospheric turbulence fade for an Earth/Space system, and our physical emulation test bed components. For modeling the atmosphere, we have used the Hufnagel-Valley model, in combination with Cn2 measurement parameters and MATLAB software. From these models, power fluctuation time series were generated and subsequently converted to voltages that were uploaded into an acousto-optic modulator and signal generator. The acousto-optic modulator is a compact, fiber-based device that has a maximum 55 MHz response and 45 dB of range, making it a viable component for future integration into a laboratory atmospheric emulation test bed. Results from our fade model implementation with the acousto-optic modulation system will be offered and discussed.

Paper Details

Date Published: 2 March 2020
PDF: 8 pages
Proc. SPIE 11272, Free-Space Laser Communications XXXII, 1127219 (2 March 2020); doi: 10.1117/12.2546511
Show Author Affiliations
Evan J. Katz, NASA Glenn Research Ctr. (United States)
Yousef K. Chahine, NASA Glenn Research Ctr. (United States)
Brian E. Vyhnalek, NASA Glenn Research Ctr. (United States)
Sarah A. Tedder, NASA Glenn Research Ctr. (United States)


Published in SPIE Proceedings Vol. 11272:
Free-Space Laser Communications XXXII
Hamid Hemmati; Don M. Boroson, Editor(s)

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