We show that a certain phase feedback between output and input changes dramatically the
characteristics of photorefractive two-beam coupling. The diffraction efficiency of the …

The introduction of certain electronic feedback loops into photorefractive wave-coupling
schemes makes them noise free and leads to dramatic changes of the whole nonlinear …

Using the distinctive features of the photorefractive nonlinearity, we derive a general self-
consistent set of equations to describe two-wave coupling in the presence of fast and …

Photorefractive two-beam coupling with reduced spatiotemporal coherence is investigated
both theoretically and experimentally. Limited spatiotemporal coherence results in spatially …

We demonstrate that the negative amplitude gain in a photorefractive two-wave-mixing
experiment under applied electric field measurably reduces the characteristic instability of …

We investigate the physics of a novel nonlinear system, feedback controlled photorefractive
beam coupling. Inertia of the electronic feedback is found to be an element crucial for …

We investigate theoretically and experimentally the operation of a nonlinear system,
feedback controlled photorefractive beam coupling. It is shown that the feedback equations …

We present two analytical methods of solving the coupled wave equations related to two-
wave mixing in a photorefractive medium in the case where the illuminating light pattern is …

The buildup and the decay of photorefractive two-beam coupling are experimentally
demonstrated to be strongly dependent on the intensity ratio of the two beams (signal-to …

A theoretical and experimental study of the temporal response of photorefractive two-and
four-wave mixing processes is given. We examine the buildup and the decay of the output …