A rigorous three-dimensional theoretical description of the two-wave mixing processes in
cubic crystals is presented. The theory includes linear birefringence, self-diffraction, and …

The steady-state beam-coupling gain during two-wave mixing in photorefractive materials
has been analyzed in the strong nonlinear regime (high modulation depths). Numerical …

We consider non-degenerate two-wave mixing in photorefractive Bi 12 SiO 20. It is shown
theoretically that the presence of absorption and optical activity in the photorefractive media …

The theory for two-wave mixing in a photorefractive material with an external electric field
and a moving grating is developed. Large gain enhancements are predicted for grating …

Owing to the anisotropy and optical activity of photorefractive crystals of the sillenite type
(Bi12GeO20 and Bi12SiO20), degenerate four-wave mixing strongly depends on the …

We review the conditions of high gain in wave-mixing experiments with photorefractive Bit
2Si020 crystals. These interactions are based on the recording of a moving interference …

We show theoretically that the group velocity of light can be slowed down by means of
phase coupling in the photorefractive two-wave mixing process. It is shown that the group …

Large values of the exponential gain coefficient Γ are obtained (Γ≂ 8–12 cm− 1) when
recording with a moving grating in photorefractive BSO crystals (nearly degenerate two …

A simple model of the effect of optical activity on two-wave mixing coupling constants in Bi
12 SiO 20 (BSO) crystal is developed. The model is tested for two particular transverse …

We study the polarization properties of volume phase gratings induced in photorefractive
materials that are both optically active and linearly birefringent, such as Bi_12SiO_20 …