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Proceedings Paper

Light-scattering noise limits to optical signal processing in photorefractive media
Author(s): Robert M. McGraw
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Paper Abstract

This paper investigates the effects of thermal light-scattering fluctuations and demonstrates that these are the dominant noise source inherent in photorefractive and electro-optic media. Fundamental noise limits to dynamic range and channel capacity are determined. Two sources of light-scattering fluctuations are examined: (1) thermal fluctuations in the space-charge field, which induce corresponding fluctuations in the dielectric constant through the electro-optic effect, and (2) fluctuations associated with the optical Kerr effect. Calculations are present for BaTiO3 and several other materials and are discussed in light of recent experimental measurements of dynamic range. Our results suggest a very large dynamic range for photorefractive materials (120 - 140 dB) that should prove useful for optical signal processing applications.

Paper Details

Date Published: 1 April 1992
PDF: 11 pages
Proc. SPIE 1626, Nonlinear Optics III, (1 April 1992); doi: 10.1117/12.58078
Show Author Affiliations
Robert M. McGraw, Rockwell International Science Ctr. (United States)

Published in SPIE Proceedings Vol. 1626:
Nonlinear Optics III
Robert A. Fisher; John F. Reintjes, Editor(s)

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