Kinetics of photoinduced gratings by a moving grating technique

A moving grating technique is used to monitor the kinetics of the amplitude s and phases of the modulations of refractive index and absorption coeffici ents induced in a photosensitive material by exposure to a system of interf erence fringes. The analysis is performed here, in the case of thick materi als including the slanted geometry, useful for polymeric photorefractive ma terials. It is illustrated in the case of a photochromic photorefractive cr ystal. A detailed error analysis is presented for a photochromic DR1 film a nd a SBN photorefractive crystal. (C) 1999 Elsevier Science B.V. All rights reserved.