Theoretical and experimental investigations of the linear and nonlinear space–charge field
effects in photorefractive materials are reviewed. In particular, the aim is to explore the …

We report on the first experimental observation of so-called nondegenerate photorefractive
parametric amplification. We show that due to this effect it is possible for a weakly modulated …

Nonlinear interactions between multiple coherent photorefractive gratings in Bi12SiO20 are
investigated. It is demonstrated that the nonlinear mixing, or cross talk, is strongly influenced …

Using a new model based on the so-called perturbational approach, we present a
theoretical analysis of nonlinear multiple-grating interaction in diffusion-dominated …

The space-charge wave theory of photorefractive parametric amplification is presented. It
describes the amplification process in which a strong running holographic grating pumps …

We investigate the polarization and electrical properties of additional light beams associated
with the generation of the spatial subharmonic K/2 of a fundamental photorefractive grating …

We present a theoretical model of photorefractive parametric oscillation that is capable of
explaining the occurrence of so-called longitudinal, degenerate, and transversal parametric …

We report the simultaneous combined excitation of the space charge and photoconductivity
gratings in photorefractive Bi 12 Si O 20 and Bi 12 Ti O 20 crystals. The experiments are …

An analysis of symmetric three-wave forward mixing in a cubic crystal with an applied ac
external electric field is carried out for the case of a strong central wave and weak side …

A nonlinear interaction of moving space-charge and photoconductivity gratings is
experimentally investigated. In the presence of a dc electric field, a crystal is irradiated with …