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Proceedings Paper

Recording/reproduction simulation of holographic memory using three-dimensional beam propagation method
Author(s): Tomohiro Ohori; Shuhei Yoshida; Manabu Yamamoto
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Paper Abstract

The rapid progress in computer performance and widespread use of broadband networks has facilitated the transmission of huge quantities of digital information, thus increasing the need for high-speed, large-capacity storage devices and leading to studies on holographic data storage (HDS). Compared with laser disks where the recording density is limited by optical diffraction, HDS provides ultrahigh capacity with multiplex recording and high-speed transfer greater than 1 Gbps; it has excellent potential for optical memory systems of the future [1]. To develop HDS, a design theory for element technologies such as signal processing, recording materials and optical systems is required. Therefore, this study examines technology for simulating the recording and reproduction for HDS. In simulations thus far, the medium for the recording process has usually been approximated as laminated layers of holographic thin films. This method is suitable for systematic evaluation because the computational cost is low and it allows simulation in the true form of data, that is, in two-dimensional digital data patterns. However, it is difficult to accurately examine the influence of film thickness with a two-dimensional lamination simulation. Therefore, in this study, a technique for analyzing thick-film holograms is examined using the beam propagation method. The results of a two-dimensional simulation assuming laminated, holographic thin films and a three-dimensional simulation using the beam propagation method are compared for cases where the medium need not be treated as a thick film.

Paper Details

Date Published: 14 May 2010
PDF: 12 pages
Proc. SPIE 7717, Optical Modelling and Design, 77171C (14 May 2010); doi: 10.1117/12.854113
Show Author Affiliations
Tomohiro Ohori, Tokyo Univ. of Science (Japan)
Shuhei Yoshida, Tokyo Univ. of Science (Japan)
Manabu Yamamoto, Tokyo Univ. of Science (Japan)

Published in SPIE Proceedings Vol. 7717:
Optical Modelling and Design
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

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