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Microholographic Multilayer Recording at DVD density

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Abstract

The microholographic approach to 3D optical data storage is based on writing and reading of microlocalized volume gratings in a photopolymer layer. Reflection-type Bragg gratings created by diffraction limited laser beams replace the pit and land structure of a DVD. Recording and readout of these microgratings at DVD density is reported. The potential of the multilayer method for microholographic data storage is demonstrated by 39 layers of microgratings written in a 300 μm Aprilis photopolymer. Characterization of violet polymer media for holographic recording is also reported. A standard optical drive is slightly modified for the development of a first microholographic disk & drive storage system.

© 2007 Optical Society of America

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