Abstract

Photorefractive dynamic holographic memories provide non decaying holograms during huge number of exposures, selective erasure, and rewriting of arbitrary hologram without affecting other stored holograms, and nondestructive readout. However, a basic problem with multiplexed photorefractive holograms is that reading/writing/erasure of a certain hologram will also affect other stored holograms. One solution to this problem is dynamic copying.^1–3 We report here the experimental demonstration of a new photorefractive dynamic holographic memory that features simple architecture, system stability, phase coherence of holograms, high steady-state diffraction efficiency, selective erasure and rewriting, and nondestructive readout.

© 1992 Optical Society of America