<title>Optimization of diffraction efficiency of transmission hologram in cubic photorefractive piezocrystal of (110)-cut in dc electric field</title>

Abstract

On the base of the analytical solution of the couple differential equations system in the photorefractive piezocrystal with transmission holographic grating the optimization of the diffraction efficiency is conducted by choice of the crystal orientation and linear polarization of the reading light. It has been theoretically established, that for bi12SiO20 piezocrystal with thickness 10 mm at different values of external electric field E0 the maximum diffraction efficiency (eta) M is reached for the following magnitudes of the (theta) and (Psi) respectively: without electric field (theta) =42 degree(s), (Psi) =35 degree(s), with electric field 5 kV/cm (theta) =51 degree(s), (Psi) =19 degree(s). Without taking into account the piezoelectric effect these orientation and polarization angles have the following values: without electric field (theta) =0 degree(s), (Psi) =107 degree(s), with electric field 5 kVcm (theta) =43 degree(s), (Psi) =31 degree(s). It is shown, that taking into account the piezoelectric effect increases the maximum diffraction efficiency (eta) M in 2.13 times at E0; in 2.47 times at E0=5 kV/cm; in 1.75 times at E0=1- kV/cm; in 1.43 times at E0=15 kV/cm.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.