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Proceedings Paper

Experiment on automatic data duplication in all-optical holographic memory
Author(s): Mitsuru Toishi; Atsushi Okamoto; Kunihiro Sato; Hisatoshi Funakoshi
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Paper Abstract

In this report, we study the automatic data duplication function in an all-optical fault tolerant holographic memory with two photorefractive crystals. In this memory, when a partial data are dropout, the dropout event is detected and the dropout data are restored automatically without any electronic device. We analyze the dependency of the data restoring performance on the frequency of dropout event. We calculate the MTTR (Mean Time To Recovery), in case the data in one crystal are dropout, then the data in another crystal are also lost before the dropout data haven't been completely yet. On the assumption that the data in one of the crystal are dropout, we conduct the experiment in the data recovery on this memory to examine the performance of restoring the data. We achieve that the MTTR is 1seconds and the data are continuously readout over 550 seconds when the stored data in one of the crystal are lost.

Paper Details

Date Published: 30 October 2001
PDF: 8 pages
Proc. SPIE 4598, Photonics Technology in the 21st Century, (30 October 2001); doi: 10.1117/12.447108
Show Author Affiliations
Mitsuru Toishi, Hokkaido Univ. (Japan)
Atsushi Okamoto, Hokkaido Univ. (Japan)
Kunihiro Sato, Hokkai-Gakuen Univ. (Japan)
Hisatoshi Funakoshi, Hokkaido Univ. (Japan)

Published in SPIE Proceedings Vol. 4598:
Photonics Technology in the 21st Century
John H. Marsh; Pallab Bhattacharya; Osamu Wada, Editor(s)

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