Optically implemented memory correlator using a photorefractive

Details Optically implemented memory correlator using a photorefractive Optically implemented memory correlator using a photorefractive

1986-02-03

1988-02-23

Arnold, Bruce Y.

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35016213, 35016214, 364822, G03H 102, G06G 900

Patent

active

047266392

ABSTRACT:
An optically implemented technique which generates the correlation function f two electrical signals. A reference signal is used in conjugation with an acousto-optic device to generate an optical field which is incident on a photorefractive crystal. This produces in the crystal a reflection phase conjugate wave front reconstructing volume hologram. A retropropagating reconstructed optical field passes back through the device which contains a second signal. This optical field is then focused onto a photodiode. The time varying component of the photodiode output is the correlation of the two signals.

REFERENCES:
patent: 3597045 (1971-08-01), Mathisen
patent: 3694657 (1971-03-01), Brooks
patent: 4284324 (1981-08-01), Huignard
patent: 4523293 (1985-06-01), Auld et al.
patent: 4592009 (1986-05-01), Mashoff

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