The Bragg deviation effect on distortions of a reconstructed data page image in holographic memory

Distortions of reconstructed data page images in a holographic memory under the Bragg deviation effect are experimentally investigated and modeled. It is found that not only the diffraction efficiency of the reconstructed image is reduced, but also the intensity distribution of information elements over the image field is nonuniform. For inhomogeneous volume holograms, distortions of the reconstructed data page image are more complex. As a result of blurring contour of the angular selectivity characteristic, the level of mutual interferences of neighboring holograms grows, but the intensity nonuniformity of information elements over the data page image field decreases.