The modulational instability of quasi-plane-wave optical beams in biased photorefractive
media is investigated under steady-state conditions. The spatial growth rate of the sideband …

We investigate the modulation instability of quasi-plane-wave optical beams in biased
photorefractive-photovoltaic crystals by globally treating the space-charge field. The …

The space-charge-field formation in a photorefractive crystal illuminated by a one-
dimensional light pattern is studied when an alternating square-wave electric field is applied …

It is shown that spatial gratings in photorefractive crystals, induced by the standing
interference pattern of two coherent waves and an external alternating electric field, may be …

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

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 …

We show analytically and numerically that the refractive-index gratings produced by the
photorefractive effect need not be of the same periodicity as the driving light intensity. Even …

The fundamental component of the space-charge field in a photorefractive crystal is studied
in the presence of an applied alternating electric field. A general equation for the amplitude …

The complete basic equations for 2+ 1-dimensional self-trapped beam propagation in
photorefractive media are numerically solved, with the anisotropic nonlocal response …

It is shown that weakly damped space-charge waves exist in photorefractive crystals with a
sufficiently large lifetime–mobility product. The dispersion law, the damping constant, and …