发明名称 |
Method for producing glass preform for optical fiber |
摘要 |
An optical fiber comprising a core essentially made of quartz and a cladding made of fluorine added quartz is fabricated with good productivity from a glass preform produced by a method comprising maintaining a hollow cylindrical porous glass preform in a first high temperature atmosphere comprising at least one fluorine-containing compound with jetting a cooling gas through the central hollow part of the porous glass preform to grade the amount of fluorine to be added in the radial direction of the porous glass preform and then sintering the porous glass preform in a second high temperature atmosphere kept at a temperature higher than the first high temperature atmosphere to make it transparent.
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申请公布号 |
US4693738(A) |
申请公布日期 |
1987.09.15 |
申请号 |
US19850781636 |
申请日期 |
1985.09.30 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
HOSHIKAWA, MASAO;KYOTO, MICHIHISA;YANO, KOJI;TANAKA, GOTARO |
分类号 |
C03C13/04;C03B37/014;C03B37/12;C03B37/14;G02B6/00;(IPC1-7):C03B37/014 |
主分类号 |
C03C13/04 |
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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