2-PORT PHOTOREFRACTIVE JOINT-TRANSFORM CORRELATOR

We present what is to our knowledge the first quantitative analysis of the dual optimality that can be achieved in the all-optical two-port photorefractive joint-transform correlator. We determine the operating region where these ports have complementary performance: the first po rt performs well for non-Gaussian clutter noise, and the second port i s optimal for additive Gaussian noise. Dual optimality is achieved wit hout the performance compromise of the optimal trade-off filter approa ch. (C) 1995 Optical Society of America