发明授权
- 专利标题： Method for producing glass preform for optical fiber
- 专利标题（中）： 光纤玻璃预制棒的制造方法
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申请号： US938502申请日： 1992-08-31
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公开(公告)号： US5221309A公开(公告)日： 1993-06-22
- 发明人: Michihisa Kyoto , Minoru Watanabe , Hiroo Kanamori
- 申请人： Michihisa Kyoto , Minoru Watanabe , Hiroo Kanamori
- 申请人地址： JPX Osaka
- 专利权人： Sumitomo Electric Industries, Ltd.
- 当前专利权人： Sumitomo Electric Industries, Ltd.
- 当前专利权人地址： JPX Osaka
- 优先权： JPX61-95541 19840515
- 主分类号： C03B37/014
- IPC分类号： C03B37/014
摘要：
A method for producing a glass preform, which method comprises forming a soot preform of glass fine particles comprising SiO.sub.2 by flame hydrolysis or solution hydrolysis of a starting glass material and sintering the soot preform in an atmosphere containing at least SiF.sub.4 to obtain a glass preform which is free from an increase in absorption due to impurities and has sufficiently low attenuation of light transmission.
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