We present experimental results on the propagation of an interference pattern of two He–Ne
laser beams of unequal amplitudes through a photorefractive Bi_12TiO_20 crystal in the …

We report on the experimental observation of the modulational instability of quasi-plane-
wave beams in the self-defocusing photorefractive crystal LiNbO 3: Fe. Our analysis shows …

Another optical nonlinear effect is reported: the transient self-bending of a laser beam within
a photorefractive crystal under an external electric field. It is based on the large drift length of …

We study theoretically and experimentally the modulational instability of broad optical
beams in photorefractive nonlinear media. The angular dependence of the growth rate of …

This paper presents a way to achieve optical limiting using the self-focusing of a laser beam
in a photorefractive medium. In this view, the protection is not based on the absorption of the …

It is shown that the propagation of steady-state spatial solitons in a bismuth titanium oxide
(Bi_12TiO_20) photorefractive crystal is strongly affected by the presence of concomitant …

We report the real-time direct interference-term measurement for a two-wave-mixing
experiment in photorefractive crystals. Knowledge of the interference term may provide …

The analysis performed shows that in cubic photorefractive crystals (of Bi12SiO20 and GaAs
type in particular) with drift (''quasilocal'') mechanism of optical nonlinearity spatial soliton …

We propagate two coherent and parallel beams of a He–Ne laser through a Bi_12TiO_20
photorefractive crystal in the presence of drift nonlinearity. Our experimental results …

As a result of the original theoretical analysis in different approximations we show that the
steady-state photoinduced photorefractive lens formed under an external transverse dc …