Photosensitive optical media of the types that are used in real-time holography generally
exhibit both photorefractive and photochromic response. The parameters that characterize …

Theoretically we investigate the operation of a novel nonlinear system, feedback controlled
photorefractive beam coupling. It is shown that the feedback conditions used earlier ((pi)/2 …

The review of recent experimental work on photorefractive grating recording and frequency
degenerate nonlinear wave mixing in periodically poled lithium niobate is given. We report …

Implementation of certain electronic feedbacks between the optical output and input is able
not only to stabilize the photorefractive setups against phase fluctuations, but also to shape …

The idea of ac-enhancement of the insufficiently high nonlinear response of fast
photorefractive sillenites crystals goes back to the 80ies [1, 3]. It was found first in 1985 [5] …

Использование определенных обратных связей в фоторефрактивных оптических
схемах приводит к реализации периодических состояний и формированию …

An active stabilization of photorefractive (PR) two-wave coupling by means of an electronic
feedback was introduced several years ago and used extensively in the transmission …

Introduction of an electronic feedback loop into photorefractive (PR) wave-coupling schemes
makes them noise-free and leads to dramatic changes of the nonlinear behavior. The …