We demonstrate a scheme for volume holographic storage based on the features of shift selectivity of a speckle reference-wave hologram. The proposed recording method permits more-efficient use of the recording medium and yields greater storage density than spherical or plane-wave reference beams. Experimental results of multiple hologram storage and replay in a photorefractive crystal of iron-doped lithium niobate are presented. The mechanisms of lateral and longitudinal shift selectivity are described theoretically and shown to agree with experimental measurements.
© 1999 Optical Society of America
(030.6140) Coherence and statistical optics : Speckle
(090.0090) Holography : Holography
(090.4220) Holography : Multiplex holography
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories
Vladimir Markov, James Millerd, James Trolinger, Mark Norrie, John Downie, and Dogan Timucin, "Multilayer volume holographic optical memory," Opt. Lett. 24, 265-267 (1999)