Fabrication of transparent tellurite-based glass-ceramics with graded optical nonlinearity

Takayuki Komatsu, Yasuhiko Benino, Ryosuke Sakai

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Transparent TeO 2-based glass-ceramics with graded optical nonlinearity such as second harmonic generation (SHG) have been fabricated for the first time through the two-step heat-treatment of 15K 2O-15Nb 2O 5-70TeO 2/ 7.5Li 2O-7.5Na 2O-15Nb 2O 5-70TeO 2 joined glass sample. The gradual distribution of the species of alkali metal ions at the interface is confirmed from X-ray diffraction analyses. This result indicates the gradation of the second harmonic intensity at the interface, because the perfect solid solution between Na + and K + occurrs in the crystalline phase showing SHG and the intensity of second harmonicity decreases with increasing Na 2O/K 2O ratio. The fabrication of the transparent glass-ceramics having the gradient of the degree of the crystallization of the phase showing SHG has been also tried using the joined glass of 15K 2O-15Nb 2O 5-70TeO 2 (sample A) and 15K 2O-15W 2O 6-70TeO 2 (sample B). Sample B is very stable thermally against crystallization. The crack is observed at the interface of such glass-ceramics because a large difference in the thermal expansion coefficient between the crystallized sample A showing SHG and the sample B maintaining the glassy state. The transparent Er 3+ and Eu 3+-doped glass-ceramics have been successfully prepared, and it is found that the intensity of the frequency upconversion fluorescence at around 550 nm due to the 4S 3/24I 15/2 transition of Er 3+ in the glass-ceramics is strong compared with that in their precursor glass. This gives a new possibility for the fabrication of optically functionally graded TeO 2-based glass-ceramics.

Original languageEnglish
Pages (from-to)1055-1062
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume62
Issue number11
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

Glass ceramics
nonlinearity
ceramics
Harmonic generation
Fabrication
fabrication
glass
harmonic generations
Crystallization
Glass
Alkali Metals
Alkali metals
crystallization
Thermal expansion
Metal ions
tellurous acid
Solid solutions
Fluorescence
Heat treatment
Crystalline materials

Keywords

  • Low phonon energy
  • Optically graded glass-ceramics
  • Second harmonic generation
  • Tellurite-based glasses

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Fabrication of transparent tellurite-based glass-ceramics with graded optical nonlinearity. / Komatsu, Takayuki; Benino, Yasuhiko; Sakai, Ryosuke.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 62, No. 11, 1998, p. 1055-1062.

Research output: Contribution to journalArticle

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abstract = "Transparent TeO 2-based glass-ceramics with graded optical nonlinearity such as second harmonic generation (SHG) have been fabricated for the first time through the two-step heat-treatment of 15K 2O-15Nb 2O 5-70TeO 2/ 7.5Li 2O-7.5Na 2O-15Nb 2O 5-70TeO 2 joined glass sample. The gradual distribution of the species of alkali metal ions at the interface is confirmed from X-ray diffraction analyses. This result indicates the gradation of the second harmonic intensity at the interface, because the perfect solid solution between Na + and K + occurrs in the crystalline phase showing SHG and the intensity of second harmonicity decreases with increasing Na 2O/K 2O ratio. The fabrication of the transparent glass-ceramics having the gradient of the degree of the crystallization of the phase showing SHG has been also tried using the joined glass of 15K 2O-15Nb 2O 5-70TeO 2 (sample A) and 15K 2O-15W 2O 6-70TeO 2 (sample B). Sample B is very stable thermally against crystallization. The crack is observed at the interface of such glass-ceramics because a large difference in the thermal expansion coefficient between the crystallized sample A showing SHG and the sample B maintaining the glassy state. The transparent Er 3+ and Eu 3+-doped glass-ceramics have been successfully prepared, and it is found that the intensity of the frequency upconversion fluorescence at around 550 nm due to the 4S 3/2→ 4I 15/2 transition of Er 3+ in the glass-ceramics is strong compared with that in their precursor glass. This gives a new possibility for the fabrication of optically functionally graded TeO 2-based glass-ceramics.",
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N2 - Transparent TeO 2-based glass-ceramics with graded optical nonlinearity such as second harmonic generation (SHG) have been fabricated for the first time through the two-step heat-treatment of 15K 2O-15Nb 2O 5-70TeO 2/ 7.5Li 2O-7.5Na 2O-15Nb 2O 5-70TeO 2 joined glass sample. The gradual distribution of the species of alkali metal ions at the interface is confirmed from X-ray diffraction analyses. This result indicates the gradation of the second harmonic intensity at the interface, because the perfect solid solution between Na + and K + occurrs in the crystalline phase showing SHG and the intensity of second harmonicity decreases with increasing Na 2O/K 2O ratio. The fabrication of the transparent glass-ceramics having the gradient of the degree of the crystallization of the phase showing SHG has been also tried using the joined glass of 15K 2O-15Nb 2O 5-70TeO 2 (sample A) and 15K 2O-15W 2O 6-70TeO 2 (sample B). Sample B is very stable thermally against crystallization. The crack is observed at the interface of such glass-ceramics because a large difference in the thermal expansion coefficient between the crystallized sample A showing SHG and the sample B maintaining the glassy state. The transparent Er 3+ and Eu 3+-doped glass-ceramics have been successfully prepared, and it is found that the intensity of the frequency upconversion fluorescence at around 550 nm due to the 4S 3/2→ 4I 15/2 transition of Er 3+ in the glass-ceramics is strong compared with that in their precursor glass. This gives a new possibility for the fabrication of optically functionally graded TeO 2-based glass-ceramics.

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