ALL-OPTICAL NONLINEAR JOINT FOURIER-TRANSFORM CORRELATOR

被引：21

作者：

KHOURY, J ^{[1
]}

KANE, JS ^{[1
]}

ASIMELLIS, G ^{[1
]}

CRONINGOLOMB, M ^{[1
]}

WOODS, C ^{[1
]}

机构：

[1] ROME LAB, OPT SIGNAL PROC BRANCH, BEDFORD, MA 02173 USA

来源：

APPLIED OPTICS | 1994年 / 33卷 / 35期

关键词：

D O I：

10.1364/AO.33.008216

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present the first all-optical nonlinear joint transform correlator based on a square-law receiver in the Fourier plane. Our device uses a photorefractive limiting quadratic processor. The compressional nonlinearity associated with the transfer function of the limiting quadratic processor enables the correlator to detect signals embedded in Gaussian and non-Gaussian noise. In the limiting region this device correlates the phase-only information of the input. This is the first time to our knowledge that photorefractives or real-time holography has been used in the correlation of the phase-only information. We demonstrate the operation of this device experimentally, and we evaluate its performance through computer simulation for various forms of noise.

引用

页码：8216 / 8225

页数：10

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