发明名称 |
PRODUCTION OF PREFORM OF SILICA OPTICAL FIBER |
摘要 |
In the manufacture of silica optical fibers a tube having an internal coating of a volatile dopant is locally heated by a hot zone repeatedly traversed along its length to promote shrinkage and finally collapse of the tube bore. During the shrinkage prior to the final collapse traversal a gas flow of oxygen and a halide of the volatile dopant is maintained through the tube in order firstly to provide a small overpressure to ensure circularity in the shrinkage and secondly to compensate for the tendency for dopant to be lost by volatilization. |
申请公布号 |
JPS541046(A) |
申请公布日期 |
1979.01.06 |
申请号 |
JP19780033192 |
申请日期 |
1978.03.24 |
申请人 |
INT STANDARD ELECTRIC CORP |
发明人 |
JIYON AABEN;ANDORIYUU PIITAA HARISUN |
分类号 |
C03B37/018;G02B6/00 |
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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