Optical Bistability and Hysteresis under Phase Conjugation in CdS Crystal

The exact solution of the nonlinear equations, describing phase conjugation (PC) was obtained. Theoretical dependence of the backward wave intensity on that of interacting waves with Gaussian time shape exhibits well-pronounced hysteresis, which causes the bistable operation when total pump intensity exeeds some critical value Icr. Several hysteresis loops are expected to appear with further increase of pumping.