Crystallization behaviors with pre-treatments of thermal annealing and ultraviolet laser irradiation in Ge-doped SiO2 glass fiber preforms

Takumi Fujiwara, Hideyuki Nagata, Yasuhiko Benino, Takayuki Komatsu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Crystallization behaviors in Ge-doped SiO2 fiber preforms fabricated by vapor-phase axial deposition (VAD) method have been investigated. Since X-ray diffraction (XRD) peaks at around 2θ = 22° in the crystallized glasses are reported to be strongly related with the induced second- and third-order optical nonlinear effects in poled glasses, enhancement of such crystalline phases is quite important and useful for fabrication of non-linear functional glasses. It has been found that crystallization behaviors are drastically affected by thermal annealing and ultraviolet (UV) laser irradiation performed prior to heat-treatments for crystallization. In particular, it has been clarified that a crystalline phase, which is known to be highly effective for increase of induced optical nonlinearity, can be increased by pre-treatments of UV-laser irradiation at λ = 193 nm wavelength. These results suggest that modification of initial defect states in Ge-doped SiO2 fiber preforms could lead to fabricate crystallized glasses with optical nonlinearity induced by poling and/or crystallization.

Original languageEnglish
Pages (from-to)8-10
Number of pages3
JournalJournal of the Ceramic Society of Japan
Volume111
Issue number1289
DOIs
Publication statusPublished - Jan 2003
Externally publishedYes

Keywords

  • Crystallization
  • Ge-doped SiO glass
  • Optical nonlinear glass
  • UV-laser induced effects

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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