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Proceedings Paper

Multilayer optical storage disk based on the frequency up-conversion effect from rare-Earth ions
Author(s): Ho-Pui Ho; Wing-Wai Wong; Shu-Yuen Wu; Edwin Y. B. Pun
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Paper Abstract

The application of frequency up-conversion in rare earth (Ho3+ and Yb3+) co-doped glasses for optical storage has been investigated. Optical discs with the storage layer made from rare-earth doped tellurite glasses have been studied in terms of minimum bit-size and up-conversion efficiency. The possibility of multi-layered architecture has also been investigated. The choice of using tellurite glasses is based on previous experimental results indicating this type of materials gives extremely high up-conversion efficiency. Since the up-conversion effect is dependent on the square of the intensity of the pump beam, it is possible that the effective spot size of the signal region can be a significantly smaller than that limited by diffraction, hence leading to super-resolution in the storage layer and increased storage density.

Paper Details

Date Published: 5 April 2002
PDF: 9 pages
Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); doi: 10.1117/12.461651
Show Author Affiliations
Ho-Pui Ho, City Univ. of Hong Kong (Hong Kong)
Wing-Wai Wong, City Univ. of Hong Kong (Hong Kong)
Shu-Yuen Wu, City Univ. of Hong Kong (Hong Kong)
Edwin Y. B. Pun, City Univ. of Hong Kong (Hong Kong)

Published in SPIE Proceedings Vol. 4645:
Rare-Earth-Doped Materials and Devices VI
Shibin Jiang; Robert W. Keys, Editor(s)

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