Proposition of all-optical switch with photorefractive crystal and analysis of the influence of the phase mismatching

We propose an all-optical switch controlled by the phase difference of the two control beams with photorefractive effect that induce strong nonlinear effect by relatively low beam power. We explain the concept of this switch, and calculate intensity of signal beam at each output port, then show that the switch can work. We also analyze the influence of phase mismatching in order to operate the switch efficiently.