Defects induced in Yb3+/Ce3+ co-doped aluminosilicate fiber glass preforms under UV and γ-ray irradiation.

Mario Chiesa, Kent Erik Mattsson, Stefano Taccheo, Thierry Robin, Laurent Lablonde, David Mechin, Daniel Milanese

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A set of Ce-/Yb-co-doped silica optical fiber preform cores, differing in terms of dopant concentrations are studied by Electron Paramagnetic Resonance (EPR) spectroscopy before and after irradiation of the samples with excimer UV laser light and γ-rays. Evidence of Yb3+ clustering in the case of high Yb content samples is observed on as prepared samples regardless of the presence of Ce3+ ions. Si-E′ and Al-OHC centers were identified upon photon irradiation. The results are correlated to the micro-structural origin of the photodarkening process occurring in Ce–Yb doped glass fibers.
Original languageEnglish
JournalJournal of Non-Crystalline Solids
Volume403
Pages (from-to)97-101
ISSN0022-3093
DOIs
Publication statusPublished - 2014

Keywords

  • Photo-induced defects
  • Yb-doped silica
  • EPR spectroscopy

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