We investigate the dynamics of beam fanning in a photorefractive barium titanate crystal at
different wavelengths and with a mixed-polarization state of the input beam. The …

A scheme is described for removal of beam fanning, which is noise in the amplified image,
by two-beam coupling in a photorefractive BaTiO 3 crystal. The large time constant of the …

In signal beam amplification by two-beam coupling in BaTiO 3 photorefractive crystals, beam
fanning in the direction of the amplified signal reduces the signal-to-noise ratio (SNR). The …

The depletion efficiencies and their corresponding constant times are investigated in four
differently doped barium titanate crystals at the near-infrared wavelength of 854 nm. It is …

The spatial fidelity of amplified images in photorefractive materials due to spatial gain
variations with computation and experiment based on BaTiO 3 is investigated. The results …

A model to describe the fanning effect based on the beam-coupling mechanism in
photorefractive crystals is presented. The intensity distribution of the fanning beam in a 45° …

We numerically studied the spatial fidelity of coherent image amplification by two-wave
mixing configurations in photorefractive BaTiO_3: Ce using a three-dimensional analysis …

Optical information processing is one possible application of photorefractive crystals. In
contrast to other methods where photorefractive crystals with high electro-optic coefficients …

We demonstrate experimentally that internal reflections of a signal and (or) a pump beam
allow one to increase beam amplification by two-beam coupling in a long Bi_12TiO_20 …

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 …