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 …

We explore theoretically and experimentally how application of an electric field to a
photorefractive crystal affects the recording and the readout of holograms. We consider, for …

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 …

Using a new experimental geometry, we have proved for the first time that the generation of
spatial subharmonic gratings in photorefractive crystals is not dependent on optical …

We show analytically and numerically that the refractive-index gratings produced by the
photorefractive effect need not be of the same periodicity as the driving light intensity. Even …

We show that the dielectric grating induced by an external probe in a photorefractive crystal
with the period of the external probe can be unstable against period multiplication. We …

We demonstrate a technique by which the amplitudes of the various spatial harmonics of a
holographic grating written in a photorefractive material may be increased with respect to …

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 mechanism for recording a static hologram in a photorefractive crystal in an externally
applied ac field is investigated. One beam is rapidly modulated, and the interference pattern …

Generation of spatial subharmonic gratings in photorefractive crystal with an external field
applied is investigated. Both dc and ac fields are considered. The threshold value of the …