发明名称 |
METHOD OF DRAWING BARE OPTICAL FIBER, PROCESS FOR PRODUCING OPTICAL FIBER STRAND AND OPTICAL FIBER STRAND |
摘要 |
<p>A drawing method for a bare optical fiber, comprises the steps of: melting an optical fiber preform using a heating device and drawing the bare optical fiber; and naturally cooling down the bare optical fiber or forcibly cooling down the bare optical fiber by a cooling device after the heating and melting step, wherein a temperature history during the drawing the optical fiber preform to obtain the bare optical fiber in the heating device satisfies a relational expression: T ‰¤ -0.01X + 12 where a time period when the heated and molten portion of the optical fiber preform heated and molten by the heating device reaches 1800°C or higher is T (min) and a OH group concentration in a cladding layer of the optical fiber preform is X (wtppm).</p> |
申请公布号 |
EP1728769(A4) |
申请公布日期 |
2007.03.07 |
申请号 |
EP20040818917 |
申请日期 |
2004.11.17 |
申请人 |
FUJIKURA LTD. |
发明人 |
OKADA, KENJI;HARADA, KOICHI;HIRAFUNE, SHUNICHIROU;FUJIMAKI, MUNEHISA |
分类号 |
C03B37/027;C03B37/025;C03B37/029;C03C13/04;C03C25/12;G02B6/00 |
主分类号 |
C03B37/027 |
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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