Two optical beams can couple in a photorefractive crystal without using the electro-optic
effect. Beam coupling is due to a spatially modulated absorption caused by the …

Photorefractive performances of 45 -cut BaTiO3 crystals Page 1 Optics Communications 93 (1992)
333-335 North-Holland OPTICS COM MUNICATIONS Photorefractive performances of 45 -cut …

Two new types of parametric scattering of light in photorefractive BaTiO, crystals are
investigated. Nonlinear scattering requires two orthogonally polarized pump beams. It is …

Holograms recorded under suitable conditions in photorefractive BaTiO 3 exhibit an unusual
dark build-up. The diffraction efficiency increases by some orders of magnitude after the …

Photorefractive materials are used for holographic storage, image processing, and phase
conjugation 11, 2/. Especially BaTi03 with its large electrooptic coefficients has been …

This paper gives an introduction to the photorefractive effect. The relevant physical
properties of photorefractive materials in applications such as optical storage and signal …

An unexpected two-beam coupling energy exchange has been observed in Bi 12 SiO 20
without normal (electro-optic) photorefractive effects, using circularly polarized light and a …

It is known that the optical properties of oxide crystals, such as BaTiO3, LiNbO3, and KNbO3,
are strongly influenced by the presence of impurity levels in the band gap of the material. 1 …

We present data showing a nonlinear photorefractive response at high modulation depths in
a Bi_12TiO_20 sample when applied ac fields are used. The data are interpreted by means …

In investigations of build-up and decay of elementary holograms in Bi12Ti0. 76V0. 24O20
(BTVO) crystals, non-exponential dynamics is observed. In combination with measurements …