发明名称 |
Method of manufacturing an optical fiber preform |
摘要 |
<p>A method of manufacturing an optical fiber preform is provided, with which an increase of PMD and transmission loss of an optical fiber can be restrained. The method of manufacturing an optical fiber preform includes a process of heating a glass pipe and comprises the steps of (1) supporting the glass pipe at both ends thereof such that the longitudinal axis of the glass pipe becomes substantially horizontal and (2) heating the glass pipe with a heat source, wherein the bending moment at the supporting end of the glass pipe which is treated as a cantilever is 6 Nm or more, and the displacement of the heated region of the glass pipe in the heating process is equal to or less than 1.5 mm.</p> |
申请公布号 |
EP1669329(A2) |
申请公布日期 |
2006.06.14 |
申请号 |
EP20050026594 |
申请日期 |
2005.12.06 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
HIRANO, MASAAKI;NAKANISHI, TETSUYA |
分类号 |
C03B37/018;C03B23/055 |
主分类号 |
C03B37/018 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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