ALL-OPTICAL ASSOCIATIVE MEMORY BASED ON A NONRESONANT CAVITY WITH IMAGE-BEARING BEAMS

被引：6

作者：

INGOLD, M ^{[1
]}

DUELLI, M ^{[1
]}

GUNTER, P ^{[1
]}

SCHADT, M ^{[1
]}

机构：

[1] F HOFFMANN LA ROCHE & CO LTD, CENT RES LAB, CH-4002 BASEL, SWITZERLAND

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1992年 / 9卷 / 08期

关键词：

D O I：

10.1364/JOSAB.9.001327

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A new implementation of an all-optical associative memory is presented. It is realized in a nonresonant cavity containing a photorefractive and a nematic liquid crystal. The images, which are stored on slides, modulate the intensities of the signal beams circulating in the cavity. In a photorefractive KNbO3 crystal the signal images are compared with an arbitrary input image on the pump beam by multiple two-beam coupling. In the nematic liquid-crystal cell the signal images are thresholded by a feedback-induced optical bistability. Associative readout, error correction, and image completion are demonstrated for two and three stored black-and-white images. The performance of the new scheme is estimated to be comparable with that of nonlinear holographic associative memories based on thin holograms.

引用

页码：1327 / 1337

页数：11

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