2009 Fiscal Year Final Research Report
From steelmaking glass to athermal glass
| Project/Area Number |
18360366
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SUSA Masahiro Tokyo Institute of Technology, 大学院・理工学研究科, 教授 (90187691)
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| Co-Investigator(Kenkyū-buntansha) |
ENDOU Rie 東京工業大学, 大学院・理工学研究科, 助教 (00372459)
KOBAYASHI Yoshinao 東京工業大学, 大学院・理工学研究科, 准教授 (20354269)
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| Project Period (FY) |
2006 – 2009
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| Keywords | アサーマルガラス / シリケート / 屈折率 / 線膨張係数 / 光路長 / 温度依存性 |
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| Research Abstract |
Optical communication by the wavelength division multiplexing technique requires the arrayed waveguide grating device for merging and dividing various optical signals. This device should be made of 'athermal glass' which shows no temperature dependence in the optical path length. One of the candidate materials is multicomponent silicate glass, for which slags from steelmaking industries are expected to be used. In the present work, the refractive indices (n), their temperature dependencies (dn/dT) and the linear coefficients of thermal expansion (α) were determined for SiO_2 glasses with other oxide additions to evaluate the athermal characteristics. The glass of 80mol%SiO_2-5TiO_2-15Na_2O was found to have good athermal characteristic and could be a promising composition in practice owing to its lower melting temperature than SiO_2.
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