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Optical storage disc based on the frequency up-conversion effect from rare earth ions

  • Ho Pui Ho*
  • , Wing Wai Wong
  • , Shu Yuen Wu
  • , E. E.Y. Pun
  • *Corresponding author for this work
  • City University of Hong Kong

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The application of infrared-to-visible upconversion in rare earth (Ho3+/Yb3+) co-doped TeOx sol-gel thin film for optical storage has been investigated. Optical discs with the storage layer made from rare-earth co-doped TeOx sol-gel thin films have been studied in terms of minimum bit-size and up-conversion efficiency. The possibility of a multi-layered architecture has also been investigated. The choice of using TeOx thin films is based on the higher up-conversion efficiency in the rare earth doped chalcogenide glasses. The nonlinear properties of the up-conversion effect lead to the possibility of reducing the 'effective' spot size of the signal region, smaller than that limited by diffraction, hence leading to super-resolution in the storage layer and increased storage density.

Original languageEnglish
Title of host publicationProceedings - 2002 IEEE Hong Kong Electron Devices Meeting, HKEDM 2002
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages117-120
Number of pages4
ISBN (Electronic)0780374290
DOIs
StatePublished - 2002
Externally publishedYes
Event9th IEEE Hong Kong Electron Devices Meeting, HKEDM 2002 - Hong Kong, China
Duration: 22 Jun 2002 → …

Publication series

NameProceedings of the IEEE Hong Kong Electron Devices Meeting
Volume2002-January

Conference

Conference9th IEEE Hong Kong Electron Devices Meeting, HKEDM 2002
Country/TerritoryChina
CityHong Kong
Period22/06/02 → …

Keywords

  • Biomedical optical imaging
  • Frequency
  • Optical crosstalk
  • Optical films
  • Optical materials
  • Optical recording
  • Optical scattering
  • Optical sensors
  • Particle beam optics
  • Phonons

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