发明授权
US4389230A Process for improving the transmission characteristics of optical fibers
drawn from preforms made by the MCVD technique
失效
用于改善由MCVD技术制成的预成型件拉制的光纤的传输特性的方法
- 专利标题: Process for improving the transmission characteristics of optical fibers drawn from preforms made by the MCVD technique
- 专利标题(中): 用于改善由MCVD技术制成的预成型件拉制的光纤的传输特性的方法
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申请号: US273423申请日: 1981-06-15
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公开(公告)号: US4389230A公开(公告)日: 1983-06-21
- 发明人: Eros Modone , Giacomo Roba
- 申请人: Eros Modone , Giacomo Roba
- 申请人地址: ITX Turin
- 专利权人: Cselt Centro Studi E Laboratori Telecomunicazioni S.P.A.
- 当前专利权人: Cselt Centro Studi E Laboratori Telecomunicazioni S.P.A.
- 当前专利权人地址: ITX Turin
- 优先权: ITX67934A/80 19800616
- 主分类号: C03B37/00
- IPC分类号: C03B37/00 ; C03B37/018 ; C03C13/04 ; C03C21/00 ; G02B6/00 ; C03B37/075
摘要:
In order to improve the transmission characteristics of optical fibers drawn from the preforms manufactured by vapor deposition of silica on an inner wall surface of a supporting tube of glass, the tube is subjected to a two-stage heat treatment with deuterium whereby OH.sup.- groups at least on the inner tube surface are isotopically replaced by OD.sup.- groups. This pretreatment can be carried out in the same apparatus which is subsequently used for producing the preform.
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