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Proceedings Paper

Numerical calculation for volume holograms with the focus-shift multiplexing method
Author(s): Masaki Tanaka; Kuniaki Okada; Yukiko Nagasaka; Atsushi Nakamura; Kenji Hirano; Yukio Kurata
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Paper Abstract

A holographic data storage simulator for the combined multiplexing method which consists of spatial shift, peristrophic, and focus-shift multiplexing has been developed. In the combined multiplexing method, wedge prisms were used to realize the focus-shift multiplexing, so we gave linear phase modulations on the reference beams to represent the effect of wedge prisms in the simulation and successfully got a good agreement between the simulated and experimental results on the diffraction efficiency characteristics. The diffraction efficiency decreases rapidly as the focal position of the reference beams are shifted, which indicates that it is possible to enlarge the capacity of the holographic data storage by the focus-shift multiplexing.

Paper Details

Date Published: 11 July 2007
PDF: 7 pages
Proc. SPIE 6620, Optical Data Storage 2007, 66201N (11 July 2007); doi: 10.1117/12.739087
Show Author Affiliations
Masaki Tanaka, Sharp Corp. (Japan)
Kuniaki Okada, Sharp Corp. (Japan)
Yukiko Nagasaka, Sharp Corp. (Japan)
Atsushi Nakamura, Sharp Corp. (Japan)
Kenji Hirano, Sharp Corp. (Japan)
Yukio Kurata, Sharp Corp. (Japan)


Published in SPIE Proceedings Vol. 6620:
Optical Data Storage 2007

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