Photoinduced light scattering in cerium-doped barium strontium niobate crystals

Effect of Strong Pump Depletion on Two-beam Coupling in Photorefractive BaTiO3at 442 nm

“…As is known [8,13,14], the beam fanning in a photorefractive crystal arises as a result of amplification of the scattered light through two-beam coupling with the incident beam itself. The starting point of beam fanning is the initial scattering from various imperfections and surface irregularities in the crystal .…”

Multi-Channel Adaptive Interferometers Based on Dynamic Hologram Multiplexing

“…The holographic demodulation channels operate on the basis of the so called fanning effect (Voronov, et al, 1980) which appears as self-diffraction of light wave in photorefractive media. The nature of this effect consists in energy transfer between light beam entered the photorefractive crystal and beams scattered by crystal defects and inhomogeneities (Feinberg, 1982).…”

Optical limiters using photorefractive nonlinearities

“…2 • 3 A crystal acting in this way can be thought of as an optical limiter which dumps excess power several angular degrees away from the incident direction into the fanning direction ( Fig. 1).…”