title: Simple computational model of image correlation by four-wave mixing in photorefractive media.
abstract: A simple systems-oriented model of image correlation by nondegenerate four-wave mixing in photorefractive media is discussed, and its computational implementation is described. The model is based on a linear-incomplex modulation index formulation and is capable of describing the correlation product in a wide range of experimental conditions. Bragg matching effects on the test and reference images are explicitly included. The comparison of calculated results with experimental results is excellent, and a discussion of higher-order theories of the photorefractive effect is given. The model is currently being used to optimize the performance of experimental correlators.
authors.forename: M G
authors.initials: MG
authors.lastname: Nicholson
authors.forename: I R
authors.initials: IR
authors.lastname: Cooper
authors.forename: M W
authors.initials: MW
authors.lastname: McCall
authors.forename: C R
authors.initials: CR
authors.lastname: Petts