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Proceedings Paper

Shift-phase code multiplexing technique for holographic memories and optical interconnection
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Paper Abstract

Holographic technologies for optical memories and interconnection devices have been studied actively because of high storage capacity, many wiring patterns and high transmission rate. Among multiplexing techniques such as angular, phase code and wavelength-multiplexing, speckle multiplexing technique have gotten attention due to the simple optical setup having an adjustable random phase filter in only one direction. To keep simple construction and to suppress crosstalk among adjacent page data or wiring patterns for efficient holographic memories and interconnection, we have to consider about optimum randomness of the phase filter. The high randomness causes expanding an illumination area of reference beam on holographic media. On the other hands, the small randomness causes the crosstalk between adjacent hologram data. We have proposed the method of holographic multiplexing, shift-phase code multiplexing with a two-dimensional orthogonal matrix phase filter. A lot of orthogonal phase codes can be produced by shifting the phase filter in one direction. It is able to read and record the individual holograms with low crosstalk. We give the basic experimental result on holographic data multiplexing and consider the phase pattern of the filter to suppress the crosstalk between adjacent holograms sufficiently.

Paper Details

Date Published: 4 January 2008
PDF: 11 pages
Proc. SPIE 6832, Holography and Diffractive Optics III, 68322P (4 January 2008); doi: 10.1117/12.758030
Show Author Affiliations
Satoshi Honma, Univ. of Yamanashi (Japan)
Shinzo Muto, Univ. of Yamanashi (Japan)
Atsushi Okamoto, Central Univ. (United States)

Published in SPIE Proceedings Vol. 6832:
Holography and Diffractive Optics III
Yunlong Sheng; Dahsiung Hsu; Chongxiu Yu, Editor(s)

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