公开(公告)号：WO2011138807A8

公开(公告)日：2011-11-10

申请号：PCT/IT2010/000206

申请日：2010-05-07

Applicant: PRYSMIAN S.P.A. ,  RUZZIER, Marco ,  CATTELAN, Susanna ,  MACCHETTA, Andrea ,  COLLARO, Antonio ,  CARONNA, Valeria

Inventor： RUZZIER, Marco ,  CATTELAN, Susanna ,  MACCHETTA, Andrea ,  COLLARO, Antonio ,  CARONNA, Valeria

IPC: G01M11/00 ,  G02B6/44 ,  G02B6/02

Abstract: A method for detecting faulty laying down of an optical cable exhibiting a measured cut-off wavelength is described. The method comprises: providing an optical cable for transmitting optical signals including at least one single-mode optical fibre having an attenuation equal to or larger than a first threshold value as measured when wound for one turn around a bending radius equal to or smaller than 5 mm at at least one predetermined test wavelength, the test wavelength being smaller than the measured cut-off wavelength, and an attenuation smaller than a second threshold value as measured when wound for one turn around a bending radius equal to at least a minimum bending radius at an operative wavelength equal to or larger than the measured cut-off wavelength; laying the optical cable, and measuring the attenuation in the at least one optical fibre at the predetermined test wavelength. An optical cable is also described which exhibits single-mode transmission and is bend- insensitive at wavelengths equal to or higher than a measured cut-off wavelength after propagation over a cable length. Preferably, the measured cut-off wavelength is 1260 nm. The optical cable comprises at least one optical fibre that is bend sensitive at a predetermined test wavelength not larger than the measured cut-off wavelength and is bend insensitive at an operative wavelength larger than the measured cut-off wavelength, where the cable operates in single-mode regime.

公开(公告)号：WO2018177514A1

公开(公告)日：2018-10-04

申请号：PCT/EP2017/057385

申请日：2017-03-29

Applicant: PRYSMIAN S.P.A.

Inventor： GRIECO, Stefano ,  CARONNA, Valeria ,  SCHIAFFO, Antonio

IPC: C03B37/014

Abstract: A process and an apparatus for drying and consolidating an optical fibre preform in a furnace tube comprising a heating chamber, wherein an extension tube having an extension chamber configured to house at least a length portion of the preform is removably joined to the furnace tube and the drying process starts with the preform not completely inserted into the furnace tube, an upper length portion of the preform being surrounded by the extension tube joint to the furnace tube.

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：WO2018014934A1

公开(公告)日：2018-01-25

申请号：PCT/EP2016/067057

申请日：2016-07-18

Applicant: PRYSMIAN S.P.A.

Inventor： CARONNA, Valeria ,  GRIECO, Stefano ,  SCHIAFFO, Antonio ,  CARUSO, Tonino

IPC: C03B37/014 ,  C03B37/018 ,  C03B19/14 ,  C08G77/26

Abstract: The present invention relates to a method for manufacturing a preform of silica for optical fiber production, as well as to a method for the production of optical fibers comprising a step of drawing the optical fiber from such a preform of silica, the method comprising a step of vaporization of a siloxane feedstock added with a compound having the following formula (I): wherein R, R' and R'', equal or different each other, are an alkyl group having from 1 to 5 carbon atoms, and A is a saturated or unsaturated chain of atoms selected from the group consisting of carbon atom, nitrogen atom, and oxygen atom, said chain A forming with the nitrogen atom linked thereto a saturated, unsaturated or aromatic heterocyclic moiety.

Abstract translation: 本发明涉及一种制造用于光纤生产的二氧化硅预制棒的方法，以及一种生产光纤的方法，该方法包括从这种二氧化硅预制棒拉制光纤的步骤，该方法包括步骤 添加有具有下式（I）的化合物的硅氧烷原料的汽化：其中R，R'和R“彼此相同或不同，是具有1至5个碳原子的烷基，并且A是 所述链A与选自碳原子，氮原子和氧原子的饱和或不饱和原子链形成，所述链A与与其连接的氮原子形成饱和，不饱和或芳族杂环部分。

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。

公开(公告)号：WO2018077374A1

公开(公告)日：2018-05-03

申请号：PCT/EP2016/075502

申请日：2016-10-24

Applicant: PRYSMIAN S.P.A.

Inventor： GRIECO, Stefano ,  CARONNA, Valeria ,  COCCHINI, Franco ,  SCHIAFFO, Antonio

IPC: C03B37/014

Abstract: An optical fibre preform suspending device for vertically holding an optical fibre preform by a preform handle comprising a handle enlarged-width portion is provided. The preform suspending device having a substantially cylindrical shape and comprising a housing portion having a receiving space with a front top opening and a front bottom opening and a supporting surface between the front top opening and the front bottom opening. The preform suspending device also comprises a supporting member placed on the supporting surface, for holding the handle enlarged-width portion. The supporting member is radially independent from the housing portion.

Abstract translation: 提供了一种用于通过包括手柄加宽部分的预成型手柄来垂直地保持光纤预制件的光纤预制件悬挂装置。 该预成形件悬挂装置具有基本上圆柱形的形状并且包括具有容纳空间的容纳部，该容纳空间具有前部顶部开口和前部底部开口以及位于前部顶部开口和前部底部开口之间的支撑表面。 该预成型件悬挂装置还包括放置在支撑表面上的支撑件，用于保持手柄加宽部分。 支撑构件径向独立于壳体部分。

公开(公告)号：WO2016198125A1

公开(公告)日：2016-12-15

申请号：PCT/EP2015/063232

申请日：2015-06-12

Applicant: PRYSMIAN S.P.A.

Inventor： COCCHINI, Franco ,  ADIGRAT, Antonio ,  CARONNA, Valeria ,  CAIATA, Marco, Antonio ,  COLLARO, Antonio ,  SCHIAFFO, Antonio

IPC: C03B37/014

CPC classification number: C03B37/01446 ,  C03B37/01473 ,  C03B37/01493 ,  C03B2201/31

Abstract: A method of manufacturing a glass core preform for an optical fibre comprising: providing a porous soot core preform having an outer surface and a central hole extending axially therethrough; dehydrating the porous soot core preform at a first temperature by exposing the outer surface of the preform to an atmosphere containing chlorine, and simultaneously consolidating the soot core preform and closing the central hole at a second temperature higher than the first temperature to form a glass core preform, wherein consolidating and closing comprises sequentially alternating flowing chlorine containing gas into the central hole and reducing the internal pressure of the central hole.

Abstract translation: 一种制造用于光纤的玻璃纤维预制棒的方法，包括：提供具有轴向穿过其中延伸的外表面和中心孔的多孔烟灰芯预制件; 通过将预型体的外表面暴露于含氯的气氛中，在第一温度下使多孔烟灰芯预制件脱水，同时固化烟灰芯预制件并在高于第一温度的第二温度下封闭中心孔，以形成玻璃芯 预成型件，其中固结和闭合包括顺序地将含氯气体流入中心孔并降低中心孔的内部压力。