METHOD OF MANUFACTURING PREFORMS FOR OPTICAL FIBRE

专利名称：METHOD OF MANUFACTURING PREFORMS

FOR OPTICAL FIBRES HAVING LOW WATERPEAK

发明人：ADIGRAT, Antonio,CARONNA,

Valeria,COCCHINI, Franco,COLLARO,Antonio,GRIECO, Stefano,NIVELLI, Ida

申请号：EP12815713.8申请日：20121228公开号：EP2938581A1公开日：20151104

摘要：A method of manufacturing an optical fibre preform comprising: providing aglass core rod comprising a central core region of radius a and an inner clad region ofexternal radius b to define a first core-to-clad ratio a/b; forming an intermediate glasspreform comprising an intermediate clad region surrounding the inner clad region of theglass rod and having an external radius c to define a second core-to-clad ratio a/c, andovercladding the intermediate glass preform by forming an overclad region surroundingthe intermediate clad region to form an optical fibre preform, wherein the first core-to-clad ratio a/b is equal to or less than 0.40 and the second core-to-clad ratio a/c is of from0.20 to 0.25.

申请人：Prysmian S.p.A.

地址：Viale Sarca 222 20126 Milano IT

国籍：IT

代理机构：Acco, Stefania

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