Multilayer holographic data multiplexing with random encoded reference beam

In this paper we demonstrate the scheme for volume holographic data multiplexing by using the features of shift selectivity of a random encoded speckle reference wave. The proposed recording method results in a more efficient use of the recording medium volume and increases the storage density in comparison with spherical or plane-wave reference beams. The mechanism of lateral and longitudinal shift selectivity are described theoretically and shown to agree with experimental measurements for holographic data multiplexing in the volume of the Fe:LiNbO 3 crystal.