We investigated both analytically and numerically the simultaneous influence of higher-
harmonic gratings and subharmonic gratings on the threshold for generation of the …

Using the so-called ac field technique, we investigate experimentally the influence of optical
beam coupling on the generation of subharmonic gratings in a photorefractive sillenite …

The stationary solution is obtained for the photorefractive subharmonic gratings excited in
crystals of the sillenite family by a standing light interference pattern and an applied ac …

A fully nonlinear frequency response of a moving grating in bismuth silicon oxide, including
the effects of an applied electric field, is modeled by solution of the time-dependent …

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 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 …

We develop the nonlinear theory of transversal parametric oscillation in photorefractive
sillenite crystals. The theory is nonlinear in the sense that the nonlinear feedback from the …

The space-charge-field harmonics in the refractive-index grating generated in a bismuth
silicate crystal to which a square-wave external electric field is applied were examined …

We analyze the nonlinear excitation of holographic gratings in a photorefractive crystal
being subject to an alternating electric field and a stationary light interference pattern. The …