LIGHT-DIFFRACTION AND NON-LINEAR IMAGE-PROCESSING IN ELECTROOPTIC BI12SIO20 CRYSTALS

Some characteristic peculiarities of the volume phase holograms in a high-sensitive electrooptic Bi12SiO20 crystals such as polarization properties of the diffracted light beam and nonlinear phenomena in the stationary stage of the hologram formation are investigated. Spatial frequency mixing or combinational hologram writing by means of non-linearity of the holographic process is discussed as a new promising technique of the volume holography. In particular two important problems of Bi12SiO20 crystals: nondestructive readout at the wavelength different from that of the writing beams and correlation analysis of complex two-dimensional pictures can be solved by this method. © 1979.