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.
© 1988 Optical Society of America
Original Manuscript: April 6, 1987
Manuscript Accepted: March 21, 1988
Published: June 1, 1988
N. A. Vainos, J. A. Khoury, and R. W. Eason, "Real-time parallel optical logic in photorefractive bismuth silicon oxide," Opt. Lett. 13, 503-505 (1988)