Accession Number : ADP006773
Title : Anisotropic Diffraction in Photorefractive Volume Hologram,
Corporate Author : NATIONAL CENTRAL UNIV BEIJING (CHINA) DEPT OF GEOGRAPHY
Personal Author(s) : Sun, Ching-Cherng ; Chang, Ming-Wen
Report Date : 22 MAY 1992
Pagination or Media Count : 4
Abstract : Recently, there are extensive studies on applying the photorefractive effect for optical data storage and processing. One of the most important applications is for the volume holographic storage. In this paper we report theoretical derivations and experimental results on the important properties of the anisotropic diffraction in a photorefractive volume hologram in a BaTiO3. As we shall see, the diffraction efficiency, the angular sensitivity, and the optimal reconstructing angle for obtaining the maximum diffraction efficiency depend very much on the grating vector and crystal orientations. The crystal orientation and the light beam directions are shown in Fig.l. In order to avoid the beam coupling phenomena, we use S-polarized light for writing holograms and P-polarized light for reconstruction. These two writing light beams interfere and induce a corresponding phase grating in the BaTiO3 through the photorefractive effect.
Descriptors : *DIFFRACTION, *OPTICAL STORAGE, *OPTICAL PROCESSING, ANGLES, COUPLINGS, CRYSTALS, EFFICIENCY, HOLOGRAMS, LIGHT, OPTICAL DATA, SENSITIVITY, STORAGE, VOLUME, REFRACTION, BARIUM TITANATES, GRATINGS(SPECTRA).
Subject Categories : Electrooptical and Optoelectronic Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE