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Proceedings Paper

Three-dimensional digital optical data storage with photorefractive crystals
Author(s): Satoshi Kawata
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Paper Abstract

To exceed the capacity limitation of optical method of data storage, we record and read digital data in 3D in a photorefractive material which is photosensitive for recording and refractile in reading. Optical systems, including a confocal laser-scanning system and a two-photon laser-scanning system, and photorefractive materials suitable for 3D data storage are discussed with current problems for commercial applications. We will show our latest result of two-photon recording in an undoped Lithium Niobate crystal. The comparison between photorefractive digital 3D memory with conventional holographic 3D memory and near-field memory is also discussed in terms of dynamic range, noise, recording density, and accessibility.

Paper Details

Date Published: 9 October 1998
PDF: 8 pages
Proc. SPIE 3470, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV, (9 October 1998); doi: 10.1117/12.326842
Show Author Affiliations
Satoshi Kawata, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 3470:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IV
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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