A nonlinear theory is presented for the formation of hexagonal optical structures in a
photorefractive medium equipped with a feedback mirror. Oppositely directed beams in …

The field of nonlinear optics, which has undergone a very rapid development since the
discovery of lasers in the early sixties, continues to be an active and rapidly developing …

We show that photorefractive media can support a new type of spatial soliton, in which the
diffraction is balanced by the self-scattering (two-wave mixing) of the beam spatial frequency …

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 …

In the present paper we review the physics of soliton formation in lithium niobate by means
of photorefractive nonlinearity. Considering the waveguides that such solitonic beams leave …

This is the first volume of a set of three within the Springer Series in Optical Sciences, and is
devoted to photorefractive effects, photorefractive materials, and their applications. Since the …

We study experimentally steady-state photorefractive screening solitons trapped in both
transverse dimensions and measure their beam profiles as they propagate throughout the …

Dark (bright) planar spatial solitons are predicted for photovoltaic photorefractive materials
when the diffraction of an optical beam is exactly compensated by nonlinear self-defocusing …

Interactions between optical beams incident upon and generated within a photorefractive
material are investigated by numerically solving a set of nonlinear coupled differential …

We report the observation of large self-deflection of 2-D bright photorefractive solitons in
LiNbO_3 crystal under a dc applied field. Beam deflection as large as 300?? m after a 7 mm …