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
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume111
Issue number1289
Publication statusPublished - Jan 2003
Externally publishedYes

Fingerprint

Ultraviolet lasers
preforms
laser annealing
Laser beam effects
glass fibers
Crystallization
ultraviolet lasers
pretreatment
Glass fibers
Annealing
crystallization
Glass
irradiation
glass
nonlinearity
Crystalline materials
fibers
Fibers
heat treatment
Vapors

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

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title = "Crystallization behaviors with pre-treatments of thermal annealing and ultraviolet laser irradiation in Ge-doped SiO2 glass fiber preforms",
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.",
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author = "Takumi Fujiwara and Hideyuki Nagata and Yasuhiko Benino and Takayuki Komatsu",
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T1 - Crystallization behaviors with pre-treatments of thermal annealing and ultraviolet laser irradiation in Ge-doped SiO2 glass fiber preforms

AU - Fujiwara, Takumi

AU - Nagata, Hideyuki

AU - Benino, Yasuhiko

AU - Komatsu, Takayuki

PY - 2003/1

Y1 - 2003/1

N2 - 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.

AB - 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.

KW - Crystallization

KW - Ge-doped SiO glass

KW - Optical nonlinear glass

KW - UV-laser induced effects

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