In holographic experiments many photorefractive crystals show refractive-index changes
much smaller than one would expect from the known electro-optic coefficients and space …

The mechanisms responsible for tight-induced refractive index changes are discussed.
Special emphasis is paid to the formation of space charge fields and index changes, to …

We explore theoretically and experimentally how applying an electric field to a
photorefractive crystal affects the recording and the readout of a hologram. We present a …

The space-charge-field amplitude inside photorefractive crystals was evaluated using three
different experimental techniques:(i) two-wave mixing gain measurements,(ii) direct phase …

In this paper, the fundamental characteristics of the photorefractive effect, both in bulk
crystals and waveguides, as well as some of the most important photorefractive materials …

Light-induced scattering features in LiNbO 3-and BaTiO 3-crytals are compared with
theories on holographic writing in photorefractive crystals. It is shown that they describe the …

Two-wave mixing of phase-modulated beams in photorefractive crystals under a dc electric
field is studied both theoretically and experimentally. Based on the vectorial theory of light …

We present a method to separate the effects of trap gratings and electro-optic gratings in
BaTiO_3 crystals, and we determine the true spatial shift between the electro-optic grating …

Transmission microphotometry is used as a new tool for the investigation of the holographic
writing process of thick refractive index gratings. Theoretical results on the origin of 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 …