Multiplexing Method with Noncoaxial Spherical Waves for Holographic Data Storage

概要

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Holographic data storage capacity is proportional to the thickness of a photopolymer recording medium. To maximize the use of the performance of a photopolymer recording medium, a multiplexing technique that can record holograms in the thickness direction of such a medium is demanded. To this end, we propose a new multiplexing method that combines shift, peristrophic, and focus-shift multiplexings, and successfully records holograms in the thickness direction of the medium by controlling the incidence angle of the reference beams. We confirm that the holograms recorded are well spatially separated in the thickness direction of the medium, and that up to 50 holograms can be recorded.
2007-06-30