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 …

A simple polarization technique for separate measurement of absorption and phase gratings
in photorefractive crystals, that allowed us to demonstrate experimental evidence of …

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 …

Hole–electron competition in photorefractive gratings clickable element to expand a topic
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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 …

We have developed an approximate analytic expression of two wave mixing for absorption
and phase gratings in photorefractive materials taking into account self-diffraction effect of …

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 solve the problem of the transmission of time modulated signals in a two-beam coupling
photorefractive set-up using an absorbing material. We obtain an analytical expression that …

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 …

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 …