… The task of this paper is to derive a theory of this interaction for photorefractive KNbO3 and
BaTiO3 crystals equipped with a feedback mirror. The small parameter used in the theory is …

… feedback effects during simultaneous reading and writing of dynamic holograms in photorefractive
crystals … coefficient and the concentration of photorefractive centres. An analysis of the …

… T~ who produced a nonlinear dynamic theory incorporating a feedback mechanism … the
photorefractive effect gives information on the defect states in the crystal responsible for the effect…

… feedback effect observed in the presence of absorption in four-wave mixing in photorefractive
crystals … It is shown that with positive feedback, as the intensity of readout beam increases, …

… effects are inherent in all photorefractive crystals and introduce serious difficulties in the
mathematical formulation of the movement of holograms under feedback … The feedback condition …

… formed in a photorefractive single-feedback system with a virtual feedback mirror. The linear
… To reduce the influence of reflections from its surfaces we tilted the crystal slightly by ≈ 6 . …

… bulk photorefractive crystal with a single feedback mirror. Thus far energy transfer between
two beams and the interaction via reflection gratings in a spatially extended system have pre…

… the photorefractive response time unity in our dimensionless notation and much longer than
the feedback … Finally, we touch on the effect of the crystal thickness 0 on the behavior of our …

… Originally, the feedback was introduced to suppress the influence of phase fluctuations at …
a photorefractive setup. Experiment has shown, however, that the effect of the feedback loop is …

… feedback between output and input changes dramatically the characteristics of photorefractive
two-… When applied to LiNbO3 crystals with dominating photovoltaic charge transport, the …