It is shown that the two-wave amplification in an alternating field in photorefractive crystals of
the sillenite family is strongly affected by the drift length of photoinduced charge carriers …

A nonlinear optical phenomenon, namely, the surface waves in photorefractive crystals with
a diffusion nonlinearity (of the gradient type), is suggested and analyzed. These waves can …

We present an analysis of what is called parametric oscillation in photorefractive media. It is
shown theoretically that when a running grating and a constant electric field are applied to a …

A finite-difference technique was used to model photorefractive grating formations in sillenite
crystals under nonstationary recording conditions of applied ac electric fields. These …

The transverse instability of counterpropagating waves in photorefractive media that is due
to the formation of reflection gratings is studied. We obtain new solutions for the instability …

Unlike previous cases discussed, non-linear changes of refractive index in the
photorefractive (PR) materials are governed by both the linear and quadratic electro-optic …