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Proceedings Paper

Rotation-angularly multiplexed holographic memory system using moving window and double-focusing lens
Author(s): Byung-Chul Cho; Hong-Bay Chung; Eun-Soo Kim
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Paper Abstract

A new rotation-angularly multiplexed holographic memory system by using moving window and double-focusing lens (DFL) is proposed, in which crosstalk due to two neighboring moving window rows in the vertical direction of the conventional moving window (MW) holographic memory system can be overcome. That is to say, in the proposed method, crosstalk in the vertical direction can be eliminated by combined use of the DFL, which has periodical curvature of radius R1 and R2 with different focal lengths F1 and F2, respective, and moving windows on the LCD spatial light modulator. Light beams form curvature of radius R1 and R2 parts of double-focusing lens are focused at F1 and F2 locations, respectively, to occur different reference wave vectors Kr and Kr. By such shift multiplexing effect, crosstalks due to two neighboring MW rows in the vertical direction on the reconstruction can be eliminated. By combining the proposed multiplexing method with rotating disc-type photopolymer, it is possible to achieve the high- density storage capacity compared with the conventional holograph memory system and its feasibility is demonstrated through optical experiments.

Paper Details

Date Published: 3 June 2002
PDF: 6 pages
Proc. SPIE 4659, Practical Holography XVI and Holographic Materials VIII, (3 June 2002); doi: 10.1117/12.469269
Show Author Affiliations
Byung-Chul Cho, Kwangwoon Univ. (South Korea)
Hong-Bay Chung, Kwangwoon Univ. (South Korea)
Eun-Soo Kim, Kwangwoon Univ. (South Korea)

Published in SPIE Proceedings Vol. 4659:
Practical Holography XVI and Holographic Materials VIII
Sylvia H. Stevenson; Stephen A. Benton; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

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