Nonlinear interactions and processes of scattering of space charge waves in photorefractive crystals

Summary form only given. Dynamic holographic recording in photorefractive crystals is of great practical interest for detecting phase modulated laser signals and for real-time optical computing. Under certain conditions, dynamic recording can provide excitation of space charge waves in photorefractive crystals, resulting in a much higher recording sensitivity and giving new opportunities for signal detection. In this report we describe new effects discovered in photorefractive Bi/sub 12/SiO/sub 20/, Bi/sub 12/GeO/sub 20/, and Bi/sub 12/TiO/sub 20/ crystals associated with nonlinear interactions of space charge waves. They are frequency and wave vector doubling; and temporal and spatial rectification.