Channel wAveguides in ion-exchanged pyrex by direct UV writing

A.K. Sheridan, C. Gawith, G. Emmerson, J. Milton, P. Smith, J.S. Wilkinson

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this paper, we show that UV irradiation can induce a significant refractive index change in Pyrex, a commercial oxide glass which does not contain the most common photosensitiser, germanium. We describe the fabrication of channel waveguides in potassium-ion exchanged Pyrex by UV writing and find the maximum UV-induced change in refractive index to be 1 × 10−3. UV-induced changes in the absorption spectrum are reported and attributed to the formation of defects from iron impurities inherent in the glass. A colour-centre-related model for the observed refractive index change is proposed.
Original languageEnglish
Pages (from-to)109-114
Number of pages6
JournalOptics Communications
Volume242
Issue number1-3
DOIs
Publication statusPublished - 2004

Keywords

  • UV writing;
  • channel waveguides
  • pyrex

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