Photorefractive response and parametric scattering processes in periodically poled lithium niobate

摘要

We present an analysis of photorefractive properties of bulk periodically poled lithium niobate (PPLN) with dominating photovoltaic charge transport. The results obtained are applied to description and interpretation of phase-matched four-wave processes found recently in this novel nonlinear material. These processes manifest themselves in rings, lines and dots of light-induced scattering that are essentially different from those known for single-domain crystals.