Multilayer optical storage disk based on the frequency up-conversion effect from rare-Earth ions

Ho-Pui Ho; Wing-Wai Wong; Shu-Yuen Wu; Edwin Y. B. Pun

doi:10.1117/12.461651

5 April 2002 Multilayer optical storage disk based on the frequency up-conversion effect from rare-Earth ions

Ho-Pui Ho, Wing-Wai Wong, Shu-Yuen Wu, Edwin Y. B. Pun

Proceedings Volume 4645, Rare-Earth-Doped Materials and Devices VI; (2002) https://doi.org/10.1117/12.461651
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

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.

Citation Download Citation

Ho-Pui Ho, Wing-Wai Wong, Shu-Yuen Wu, and Edwin Y. B. Pun "Multilayer optical storage disk based on the frequency up-conversion effect from rare-Earth ions", Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); https://doi.org/10.1117/12.461651

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KEYWORDS

Glasses

Luminescence

Ytterbium

Holmium

Ions

Optical storage

Sol-gels

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