公开(公告)号：WO2014101949A1

公开(公告)日：2014-07-03

申请号：PCT/EP2012/077039

申请日：2012-12-28

Applicant: PRYSMIAN S.P.A.

Inventor： ADIGRAT, Antonio ,  CARONNA, Valeria ,  COCCHINI, Franco ,  COLLARO, Antonio ,  GRIECO, Stefano ,  NIVELLI, Ida

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/018

CPC classification number: C03B37/0126 ,  C03B37/01446 ,  C03B37/0146 ,  C03B37/01486 ,  C03B37/027

Abstract: A method of manufacturing at least one optical fibre preform comprising: providing a plurality of partially porous intermediate preforms, each partially porous intermediate preform having a longitudinal axis and comprising a respective soot intermediate clad layer formed around a respective glass core rod comprising a central core region of radius a and an inner clad region of radius b to define a first core-to-clad ratio a/b; consolidating the formed soot intermediate clad layers to form a respective plurality of intermediate glass preforms, each of the plurality of intermediate glass preforms comprising an intermediate clad region having an external radius c to define a second core-to-clad ratio a/c of from 0.20 to 0.30, and overcladding at least one intermediate glass preform by forming an overclad region surrounding the intermediate clad region to form an optical fibre glass preform, wherein consolidating comprises exposing the plurality of intermediate preforms to a consolidation hot zone of a single furnace body while rotating each of the intermediate preforms about its respective longitudinal axis.

Abstract translation: 一种制造至少一个光纤预制件的方法，包括：提供多个部分多孔的中间预制件，每个部分多孔的中间预制件具有纵向轴线，并且包括形成在相应的玻璃芯棒周围的相应的烟灰中间包层，所述玻璃芯棒包括中心芯区域 半径为b的内包层区域，以限定第一芯包层比a / b; 固结所形成的烟灰中间包层以形成相应的多个中间玻璃预制件，所述多个中间玻璃预制件中的每一个包括具有外部半径c的中间包层区域，以限定第二芯 - 包层比a / c 0.20至0.30，并且通过形成包围中间包层区的外包层区域以形成光纤玻璃预制件，将至少一个中间玻璃预成型件包覆，其中固结包括将多个中间预制件暴露于单个炉体的固结热区，同时 围绕其相应的纵向轴线旋转每个中间预型件。

公开(公告)号：WO2014101948A1

公开(公告)日：2014-07-03

申请号：PCT/EP2012/077036

申请日：2012-12-28

Applicant: PRYSMIAN S.P.A.

Inventor： ADIGRAT, Antonio ,  CARONNA, Valeria ,  COCCHINI, Franco ,  COLLARO, Antonio ,  GRIECO, Stefano ,  NIVELLI, Ida

IPC: C03B37/014

CPC classification number: C03B37/01853 ,  C03B37/014 ,  C03B37/01446 ,  C03B37/0146 ,  C03B37/018 ,  C03B37/027 ,  C03B2203/23 ,  C03B2203/24 ,  G02B6/02

Abstract: A method of manufacturing an optical fibre preform comprising: providing a glass core rod comprising a central core region of radius a and an inner clad region of external radius b to define a first core-to-clad ratio a/b; forming an intermediate glass preform comprising an intermediate clad region surrounding the inner clad region of the glass rod and having an external radius c to define a second core-to-clad ratio a/c, and overcladding the intermediate glass preform by forming an overclad region surrounding the 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 from 0.20 to 0.25.

Abstract translation: 一种制造光纤预制件的方法，包括：提供包括半径为a的中心芯区域和外部半径b的内部包层区域的玻璃芯棒，以限定第一芯包层比a / b; 形成中间玻璃预制件，其包括围绕所述玻璃棒的内包层区的中间包层区，并具有外半径c以限定第二芯包层比a / c，并且通过形成外包层区域来包覆所述中间玻璃预制件 围绕中间包层区以形成光纤预制件，其中第一芯包层比a / b等于或小于0.40，第二芯包层比a / c为0.20至0.25。