Abstract. In several oxide crystals the refractive index can be changed by inhomogeneous
illumination, and these photorefractive properties have allowed for a wide variety of …

The space-charge field of the photorefractive grating in planar waveguides in cubic crystals
is considered. Analytical expressions are derived from three cases: the initial stage of …

We investigate experimentally and theoretically two-and four-wave mixing process in
photorefractive waveguide. Amplification and phase conjugation of the guided modes is …