Abstract

The usual way to realize potentially high storage capacity of volume hologram is the multiplexing of many holograms in the single recording volume while changing the direction of the reference beam or the wavelength. The possibility for ideal multiplexing follows from Bragg conditions. During the hologrram writing. Bragg conditions correlate the wave vector of the hologram grating to the pair of wave vectors of reference and signal radiation. During the reconstruction, Bragg conditions correlate the wave vector of reconstructed radiation to the wave vectors of the hologram grating and of reading radiation. Due to this, the wave vector of reconstructed radiation is uniquely correlated to the wave vector of signal radiation. Yet strict Bragg conditions hold only for the hologram of the infinite size, and, since the size of the reall hologram is limited, these conditions are violated. Because of this, each wave vector of signal radiation is transformed into the set of wave vectors of reconstructed radiation. That leads to the cross-talk noise accompanying individual hologram reconstruction.

© 1996 IEEE