Abstract

A photorefractive medium is widely used for multiplexed holographic recording¹. Although the diffraction properties for off-Bragg conditions are important in evaluating cross-talk noise and wavelength and angular sensitivities for multiplexed holographic recording, most previous analyses have focused on the on-Bragg readout conditions. In a photorefractive medium, a photorefractive phase shift and fringe bending effect² appear within the medium. These phenomena make off-Bragg analysis for photorefractive hologram gratings very difficult. Consequently, off-Bragg analysis has been reported only for special cases³. A numerical calculation for the off-Bragg condition has also been reported⁴, but an analytical formula for calculating the diffraction efficiency for the off-Bragg condition is essential in order to easily evaluate the cross-talk noise and wavelength and angular sensitivities for the multiplexed holographic recording.

© 1996 Optical Society of America