title: Real-time parallel optical logic in photorefractive bismuth silicon oxide.
abstract: Fast parallel analog and digital optical computing operations are demonstrated by using an interferometric arrangement with photorefractive bismuth silicon oxide. Image subtraction, coherent weighted-image addition, exclusive OR/NOT, and OR optical gates are achieved by controlling the relative phase shifts of two phase-conjugate waves generated by degenerate four-wave mixing.
authors.forename: N A
authors.initials: NA
authors.lastname: Vainos
authors.forename: J A
authors.initials: JA
authors.lastname: Khoury
authors.forename: R W
authors.initials: RW
authors.lastname: Eason