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Proceedings Paper

In-line four-wave mixing correlator
Author(s): Sergio F. S. Santos; Armindo L. V. S. Lage; Augusto O. S. Gomes
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Paper Abstract

We demonstrate the implementation of an in-line four-wave mixing correlator using a BSO photorefractive crystal as a dynamic holographic medium. The advantage of this correlator is the perfect overlap of the Fourier transforms of the reference and probe images inside the crystal due to its in-line geometry. Therefore the Bragg diffraction is the only limit to the angle between writing beams. An experimental investigation about the Bragg limitation in the shift invariance of the correlator performance is also presented.

Paper Details

Date Published: 15 March 1996
PDF: 8 pages
Proc. SPIE 2752, Optical Pattern Recognition VII, (15 March 1996); doi: 10.1117/12.235651
Show Author Affiliations
Sergio F. S. Santos, Univ. do Porto (Portugal)
Armindo L. V. S. Lage, Univ. do Porto (Portugal)
Augusto O. S. Gomes, Univ. do Porto (Portugal)


Published in SPIE Proceedings Vol. 2752:
Optical Pattern Recognition VII
David P. Casasent; Tien-Hsin Chao, Editor(s)

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