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Proceedings Paper

Heterodyne Receiver For Visible Radiation Transmitted Through The Atmosphere
Author(s): Charles M. Mclntyre; James H. Churnside
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Paper Abstract

Optical heterodyne receivers operating in the turbulent atmosphere are subject to severe degradations in performance caused by random fluctuations in the index of refraction of air. These performance degradations can be minimized by understanding the statistical nature of the optical field after propagation over an atmospheric path. In order to gain some insight into these effects, an optical link consisting of a He-Ne laser transmitter operating at a wavelength of 632.8 nanometers, and a four element heterodyne receiver array containing a frequency tracking local oscillator was fabricated and operated over a 1.6 kilometer horizontal path in the turbulent atmosphere. The outputs of each of the array elements was separately demodulated and the probability density function for two or more elements was experimentally determined. The measured density function agree well with theoritical predictions. This work provides a basis for determining optimum receiver processing systems and will lead to bit error probability measurements for these optimum recievers.

Paper Details

Date Published: 18 August 1978
PDF: 4 pages
Proc. SPIE 0142, Optical Properties of the Atmosphere, (18 August 1978); doi: 10.1117/12.956539
Show Author Affiliations
Charles M. Mclntyre, Oregon Graduate Center (United States)
James H. Churnside, Oregon Graduate Center (United States)

Published in SPIE Proceedings Vol. 0142:
Optical Properties of the Atmosphere
Robert Sepucha, Editor(s)

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