Our paper I omitted reference to an important paper on simultaneous electron and hole
contributions to the space-charge field in photorefractive materials. In this paper, Orlowski …

We explain the apparent sublinear intensity dependence of photoconductivity in barium
titanate. In our model shallow acceptors act as a reservoir for charges optically excited from …

Photorefractive materials have been assuming ever increasing prominence in the non-linear
optics field due to their unique capability for displaying strong non-linear effects at milliwatt …

We demonstrate a new method of light amplification based on forward four-wave mixing in
photorefractive BaTiO_ 3. A single pump beam of combined (ordinary and extraordinary) …

A frequency-degenerate four-wave polarization interaction in photorefractive crystals is
investigated. This interaction is due to linear and circular photogalvanic currents and …

We derive an analytic expression describing the intensity and field frequency dependence of
photorefractive gain in two-beam coupling under an alternating square-wave electric field …

We present observations of polarization-flip photorefractive two-beam coupling in a GaAs
crystal, using both cw and pulsed Nd: YAG lasers. Here, two s-polarized waves are coupled …

We have produced single-crystal spheres and spherical disks of photorefractive barium
titanate BaTiO_3. The spheres and disks allow direct fiber-to-fiber two-beam coupling …

We have observed a variety of internal beam configurations in photorefractive BaTiO_3
pumped by a cw Ar^+ laser at 514.5 nm. Among these configurations was a total-internal …

Recent analytical results in the frame of photorefractive spatial-soliton propagation are
exploited to derive a novel scheme for the investigation of space-charge field formation in …