Optical correlators with fast updating speed using photorefractive semiconductor materials

An updatable optical correlator which uses a photorefractive compound semiconductor to generate real-time matched filters is proposed. Using compound semiconductors offers high speed with low optical input intensities. Here we discuss issues affecting the performance of this correlator. This include...

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Bibliographic Details
Published in:Applied optics (2004) 1988-07, Vol.27 (13), p.2756-2761
Main Authors: Gheen, G, Cheng, L J
Format: Article
Language:English
Online Access:Get full text
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Summary:An updatable optical correlator which uses a photorefractive compound semiconductor to generate real-time matched filters is proposed. Using compound semiconductors offers high speed with low optical input intensities. Here we discuss issues affecting the performance of this correlator. This includes an analysis of the Bragg diffraction and a discussion of the speed and power considerations of these materials. Experimental results obtained using photorefractive GaAs are also presented.
ISSN:1559-128X
DOI:10.1364/AO.27.002756