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Proceedings Paper

Holographic storage using phase-code and rotation multiplexing
Author(s): James Zhiqing Wen; Nan Li; Yu Xu; Xiangyang Yang
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Paper Abstract

Multiple holograms can be storage in a volume holographic medium such as photorefractive crystal or photopolymers by using phase-code multiplexing. However, due to the limited performance of currently available spatial phase encoders, only a small number of orthogonal phase codes can be implemented. This significantly limits the capacity of holographic systems based on phase-code multiplexing scheme. In this paper, a new multiplexing method, rotation multiplexing, is presented. After a number of holograms are stored by phase-code multiplexing, the holographic medium is rotated in the incident plane by a small angle. New holograms can then be stored by the same phase-codes without cross talk. By combining the phase-code and rotation multiplexing schemes, a high capacity 3D storage system can be built with off-the-shelf devices. An additional advantage of such a holographic storage system is its burst retrieval mode that is useful for network applications. The preliminary experimental results demonstrate the feasibility of the proposed approach.

Paper Details

Date Published: 25 October 1996
PDF: 8 pages
Proc. SPIE 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II, (25 October 1996); doi: 10.1117/12.255469
Show Author Affiliations
James Zhiqing Wen, Univ. of New Orleans (United States)
Nan Li, Univ. of New Orleans (United States)
Yu Xu, Univ. of New Orleans (United States)
Xiangyang Yang, Univ. of New Orleans (United States)


Published in SPIE Proceedings Vol. 2849:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II
Francis T. S. Yu; Shizhuo Yin, Editor(s)

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