Abstract
The charge transport process in photorefractive media is traditionally investigated by exposing the crystal to the interference pattern of two beams. The induced photorefractive space charge field produces a phase grating via the linear electro-optic effect. The diffraction efficiency of the grating and induced beam coupling are measured. The amplitude and phase of the photorefractive space charge field are then estimated using complex analytical models. The phase of a previously recorded photorefractive field may be indirectly measured by externally adjusting the relative spatial shift between the incident light pattern and the space charge field. Maximum energy transfer between the two beams occurs when the sum of external phase shift and the phase of the photorefractive field is 90°.
© 1991 Optical Society of America
PDF ArticleMore Like This
Christopher J. Sherman, William B. Lawler, and M. G. Moharam
ThMM7 OSA Annual Meeting (FIO) 1990
R. S. Cudney, G. D. Bacher, R. M. Pierce, and Jack Feinberg
TuA2 Photorefractive Materials, Effects, and Devices II (PR) 1991
Donald G. Gray, M. G. Moharam, and Timothy M. Ayres
MXX.8 OSA Annual Meeting (FIO) 1993