ANISOTROPIC INTRASIGNAL COUPLING IN PHOTOREFRACTIVE LINBO3

Intrasignaling coupling in a LiNbO3 photorefractive crystal is studied . It is shown that the anisotropy nature of the effective electro-opti c coefficient of this crystal results in an orientation-dependent intr asignal coupling. Analytical solutions for one-dimensional intrasignal coupling are derived for a-axis and b-axis orientations, which enable s us to estimate the maximum beam field angle and the maximum crystal thickness for a given intensity distortion due to the coupling. The re sults are thus illustrative to applications of this crystal in areas s uch as holographic data storage, interconnection, spatial mode convers ion, et cetera. (C) 1994 John Wiley & Sons, Inc.