We demonstrate the extension of the photorefractive effect in BaTiO_3 crystals to the 1.5-μm
wavelength regime, which is obtained by two-photon absorption induced by intense …

Two-wave mixing of phase-modulated beams in photorefractive crystals under a dc electric
field is studied both theoretically and experimentally. Based on the vectorial theory of light …

We demonstrate, for the first time to our knowledge, two-beam coupling in BaTiO_3 using
white light. An achromatic grating arrangement in conjunction with a high-pressure mercury …

We have investigated the feasibility of using a barium titanate crystal as a unidirectional
device. The nonlinear interaction between a beam and its own reflection from the back face …

A new kind of optical self-defocusing is described that in steady state is independent of
optical beam power and is strongly asymmetric. The physical mechanism responsible is the …

Spatially uniform heating or cooling of a photorefractive strontium–barium niobate crystal
yields large pyroelectric fields. Two-beam coupling measurements and observation of beam …

A series of cobalt-doped barium titanate (BaTiO_3) crystals were grown; these crystals have
the highest beam-coupling gain reported to date, 7.9 cm^− 1, measured by using the …

Electron paramagnetic resonance (EPR) and photo-EPR measurements have been made
on cobalt-doped BaTiO 3 single crystals. Crystals illuminated at 25 K with light in 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 …

Rh are the only ones involved in the photorefractive effect at 1.06 μm. In this paper, we apply
this model to the prediction of the steady-state photorefractive space-charge field. We …