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Implementation of a photorefractive correlator based on a fake zoom lens

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A space-variant optical correlator is experimentally implemented based on the fractional Fourier transform. The proposed arrangement employs a fake zoom lens that enables to vary the degree of the fractional Fourier transform continuously between –1 to +1. The optical device uses as a recording medium for the holographic filter a photorefractive BTO crystal. The experimental results confirm the shift-variance properties.

Keywords: Correlation; photorefractive crystals

Document Type: Original Article


Affiliations: Centro de Investigaciones Ópticas, CIOp (CONICET, CIC) y OPTIMO (Dpto. de Fisicomatemática, Facultad de Ingeniería, UNLP), P. O. Box 124, La Plata (1900), Argentina

Publication date: 2002-09-01

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