Theoretical study in the realization of real-time parallel optical logic operations using two-wave mixing in photorefractive materials

Abstract EN

A theoretical iinalysis is presented to calculate the signal phase shift and the gain coefficient associated with two-wave mixing in photoreftactive crystals subjected to an external electric field.

The relative position of the induced-refractive index grating with respect to the fringe pattern of Ihe two input opticaj beams leads to coupling effect between the phase and intensity of these beams.

An optica! logic operation system that is based on photorefractive two-wave mixing ts introduced.

This system uses the fringe-shifting techniques that are executed by a Mach-Zehnder interferometer.

The proposed system configurations are capable of producing all the basic 16 two-operand Boolean functions simultaneously at different output pianes.