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 …

Beam-coupling experiments are carried out with two BaTiO_3 crystals as a function of the
intensity and wavelength. We demonstrate in these experiments that hole–electron …

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 …

Two coherent light beams can couple in any absorbing material owing to a light-induced
modulation of the material's dielectric constant. In photorefractive crystals the coupling …

We report measurements of response time for the intensity-dependent absorption in a single
BaTiO_3 crystal under conditions in which no photorefractive effect can be observed. The …

It is shown experimentally that the nonsymmetric behavior of the beam-coupling gain
coefficient of BaTiO_3 crystals with respect to the sense of the c axis is caused by an …

The light-induced erasure rate of a photorefractive grating in barium titanate scales
sublinearly with optical intensity over a range spanning 8 orders of magnitude. Additionally …

We describe the experimental measurement of phase-conjugate reflectivity versus various
ratios of input-beam intensities in photorefractive barium titanate and strontium barium …

We report the optical absorption and photorefractive properties of a series of cerium‐doped
barium titanate crystals. The light‐induced absorption and the intensity‐dependent two …

In certain crystals, photorefractive two-beam coupling is predicted for orthogonally polarized
optical beams. The prediction follows from the phenomenological tensor form of the …