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：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：WO2010031419A1

公开(公告)日：2010-03-25

申请号：PCT/EP2008/007922

申请日：2008-09-19

Applicant: PRYSMIAN S.P.A. ,  CONSONNI, Enrico ,  COCCHINI, Franco ,  COLLARO, Antonio ,  ADIGRAT, Antonio

Inventor： CONSONNI, Enrico ,  COCCHINI, Franco ,  COLLARO, Antonio ,  ADIGRAT, Antonio

IPC: G02B6/44 ,  G02B6/02

CPC classification number: G02B6/4402 ,  G02B6/02333 ,  G02B6/02357 ,  G02B6/443

Abstract: Telecommunication cable comprising at least one microstructured optical fibre comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular void-containing region comprised of randomly arranged voids, the core region including doped silica to provide a positive refractive index relative to pure silica; and at least one protecting layer provided around said optical fibre, the protecting layer being made of a polymeric material having a low ultimate elongation.

Abstract translation: 电信电缆包括至少一个微结构化光纤，其包括芯区域和围绕芯区域的包层区域，所述包层区域包括由随机排列的空隙组成的环形空隙容纳区域，所述芯区域包括掺杂二氧化硅以提供正折射率 相对于纯二氧化硅; 以及设置在所述光纤周围的至少一个保护层，所述保护层由具有低极限伸长率的聚合材料制成。

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：WO2012010212A1

公开(公告)日：2012-01-26

申请号：PCT/EP2010/060697

申请日：2010-07-23

Applicant: PRYSMIAN S.P.A. ,  ADIGRAT, Antonio ,  COCCHINI, Franco ,  COLLARO, Antonio ,  SCHIAFFO, Antonello

Inventor： ADIGRAT, Antonio ,  COCCHINI, Franco ,  COLLARO, Antonio ,  SCHIAFFO, Antonello

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/02 ,  G02B6/023 ,  G02B6/02333 ,  G02B6/02357 ,  G02B6/0365

Abstract: The present invention relates to a single-mode optical fibre for transmitting optical signals comprising: a central core region for guiding the optical signals, and a cladding region surrounding the core region and comprising a void-containing annular layer containing randomly distributed voids, wherein the void-containing layer is doped with fluorine at a concentration of less than 1 wt% and has a radial thickness equal to or smaller than 3 μm.

Abstract translation: 本发明涉及用于传输光信号的单模光纤，包括：用于引导光信号的中心芯区域和围绕芯区域的包层区域，并且包括含有随机分布的空隙的含空隙的环形层，其中， 含氟层以浓度小于1重量％的氟掺杂并且具有等于或小于3μm的径向厚度。

公开(公告)号：WO2010031420A1

公开(公告)日：2010-03-25

申请号：PCT/EP2008/007925

申请日：2008-09-19

Applicant: PRYSMIAN S.p.A. ,  COCCHINI, Franco ,  COLLARO, Antonio ,  ADIGRAT, Antonio ,  FARALDI, Antonio ,  DI MATTEO, Francesco ,  RUSSO, Paolo

Inventor： COCCHINI, Franco ,  COLLARO, Antonio ,  ADIGRAT, Antonio ,  FARALDI, Antonio ,  DI MATTEO, Francesco ,  RUSSO, Paolo

IPC: C03B37/025 ,  C03B37/027 ,  C03B37/03 ,  G01B11/08

CPC classification number: C03B37/0253 ,  C03B37/02781 ,  C03B37/032 ,  C03B2203/14 ,  C03B2203/42 ,  C03B2205/40 ,  C03B2205/44 ,  C03B2205/72 ,  C03B2205/91

Abstract: The present invention relates to a manufacturing process of a microstructured optical fibre comprising a void-containing region, the process comprising the steps of: drawing a microstructured optical fibre along a longitudinal direction from a heated preform, wherein the optical fibre is continuously advanced along the longitudinal direction; directing a radiation beam at a longitudinal position in the longitudinal direction of the optical fibre so as to produce an interference pattern; detecting the interference pattern and producing at least one electrical detection signal corresponding to the interference pattern and comprising a plurality of signal fringe cycles; feeding the first detection signal into a first counter circuit; determining a first number of interference fringe increments N A in the plurality of signal wave fringe cycles of the at least one detection signal by using the first counter circuit; determining the outer diameter d of the optical fibre, and controlling the microstructure of the optical fibre during advancement of the optical fibre, wherein the step of controlling comprises at least one step selected from: (a) controlling that the first number of interference fringe increments N A is comprised within a reference number range of reference numbers of interference fringe increments N A t , the reference numbers N A t being smaller than a second number of interference fringe increments N D related to the outer diameter d of the microstructured optical fibre by a conversion factor K, and (b) calculating a microstructure length value d A by multiplying the first number of interference fringe increments N A by a conversion factor K and controlling that the value of the microstructure length value d A is comprised within a reference length range of reference microstructure length values d A t , the reference microstructure length values being smaller than the outer diameter d of the microstructured optical fibre.

Abstract translation: 本发明涉及一种包含含空隙区域的微结构光纤的制造方法，该方法包括以下步骤：从加热的预成型件沿纵向拉伸微结构化光纤，其中光纤沿着 纵向; 将辐射束引导到光纤的纵向方向上的纵向位置，以产生干涉图案; 检测所述干扰图案并产生对应于所述干涉图案的至少一个电检测信号，并且包括多个信号条纹周期; 将第一检测信号馈送到第一计数器电路; 通过使用所述第一计数器电路确定所述至少一个检测信号的所述多个信号波缘周期中的第一数量的干涉条纹增量NA; 确定光纤的外径d，以及在光纤提前期间控制光纤的微观结构，其中控制步骤包括至少一个步骤：（a）控制第一数量的干涉条纹增量 NA包括在干涉条纹增量NA t的参考编号范围内，参考编号NA t小于通过转换因子K与微结构光纤的外径d相关的第二数量的干涉条纹增量ND ，并且（b）通过将第一数量的干涉条纹增量NA乘以转换因子K来计算微结构长度值dA，并且控制微结构长度值dA的值包括在参考微结构长度值dA的参考长度范围内 t，参考微结构长度值小于外径d 微结构光纤。

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。