Papers

Journal of Materials Science

, Volume 28, Issue 10, pp 2738-2744

First online:

Characterization of fluorine-doped silica glasses

  • M. KyotoAffiliated withResearch and Development Group, Sumitomo Electric Industries Ltd
  • , Y. OhogaAffiliated withResearch and Development Group, Sumitomo Electric Industries Ltd
  • , S. IshikawaAffiliated withResearch and Development Group, Sumitomo Electric Industries Ltd
  • , Y. IshiguroAffiliated withResearch and Development Group, Sumitomo Electric Industries Ltd

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Fluorine-doped silica glasses containing up to 2 wt% were prepared by the vapour-phaseaxial-deposition (VAD) sintering process. The characteristics of these glasses were investigated by Raman spectroscopy, vacuum-ultraviolet-ultraviolet (v.u.v-u.v.) spectroscopy, and viscosity measurements. From the Raman spectroscopic investigation, it has been shown that the Si-F bond structure in the fibres is the same as that in bulk glass and is not affected by codoped additives such as B2O3. From the u.v.-v.u.v, spectroscopic investigation, it has been shown that the absorption band at 7.6 eV in high-purity silica glass is removed with the addition of fluorine. This addition produces a silica glass with most excellent transparency in u.v. and v.u.v. regions. Also it was observed that the optimum addition is around 1 wt%. This fact proves that fluorine incorporation in glass prevents the generation of defects related to optical loss in fibres. From the viscosity study, it was found that the viscosity decreases with an increase of the fluorine content in glass and the activation energy also decreases with increasing fluorine content.