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    A METHOD FOR MANUFACTURING AN OPTICAL PREFORM
    5.
    发明公开
    A METHOD FOR MANUFACTURING AN OPTICAL PREFORM 有权
    VERFAHREN ZUR HERSTELLUNG EINER OPTISCHEN VORFORM

    公开(公告)号：EP2947055A1

    公开(公告)日：2015-11-25

    申请号：EP15165043.9

    申请日：2015-04-24

    申请人： Draka Comteq B.V.

    发明人： Milicevic, Igor ,  Krabshuis, Gertjan ,  Gerharts, Peter ,  Hartsuiker, Johannes Antoon ,  van Stralen, Mattheus Jacobus Nicolaas

    IPC分类号： C03B37/018

    CPC分类号： C03B37/07 ,  C03B37/0124 ,  C03B37/01248 ,  C03B37/018 ,  C03B37/01861 ,  C03B37/01869 ,  C03B2203/00

    摘要： A method for manufacturing an optical preform comprising the steps of providing a substrate tube having deposited layers of glass on the inside surface thereof, increasing an outer diameter of the substrate tube by heating the substrate tube to above its softening temperature and by providing an internal pressure in the substrate tube higher than an ambient pressure, and collapsing the substrate tube by means of applying a traversing heat source to heat the substrate tube to above its softening temperature such that an optical preform is manufactured.

    摘要翻译： 一种用于制造光学预型件的方法，包括以下步骤：在其内表面上提供具有沉积玻璃层的衬底管，通过将衬底管加热到高于其软化温度并提供内部压力来增加衬底管的外径 在衬底管中高于环境压力，并且通过施加横向热源将衬底管加热到其软化温度以上，从而制造光学预型件，使衬底管塌缩。

    A method for manufacturing a precursor for a primary preform for optical fibres by means of a plasma deposition process
    6.
    发明公开
    A method for manufacturing a precursor for a primary preform for optical fibres by means of a plasma deposition process 有权
    一种用于通过等离子体沉积的方法来制备用于光纤的初级预制棒的前体的方法

    公开(公告)号：EP2821378A3

    公开(公告)日：2015-01-21

    申请号：EP14171875.9

    申请日：2014-06-11

    申请人： Draka Comteq B.V.

    发明人： Milicevic, Igor ,  van Stralen, Mattheus Jacobus Nicolaas ,  Hartsuiker, Johannes Antoon ,  Krabshuis, Gertjan

    IPC分类号： C03B37/018

    CPC分类号： C03B37/018 ,  C03B37/0183 ,  C03B37/01861 ,  C03B37/01869

    摘要： The present invention relates to a method for manufacturing a precursor of a primary glass preform, from which optical fibres can be made. In particular, the present invention relates to a method for making a primary preform for optical fibres by means of an internal plasma deposition process. The process comprises the steps of: providing a hollow substrate tube having a supply side and a discharge side; creating a first plasma reaction zone having first reaction conditions in the interior of said hollow substrate tube by means of electromagnetic radiation for effecting the deposition of non-vitrified silica layers on at least part of the inner surface of said substrate tube, at or near a reversal point at the discharge side, to provide a substrate tube having non-vitrified layers on at least a part of its inner surface. Subsequently a second plasma reaction zone is created having second reaction conditions in the interior of said hollow substrate tube by means of electromagnetic radiation for effecting the deposition of vitrified silica layers on said substrate tube having non-vitrified layers on at least a part of its inner surface. A substrate tube having deposited non-vitrified and vitrified silica layers is thereby obtained. The substrate tube having deposited non-vitrified and vitrified silica layers obtained is cooled to result in the said precursor for a primary glass preform.

    摘要翻译： 本发明涉及一种用于制造初级预成型坯玻璃的前体，从该光纤可制成的方法。 特别地，本发明涉及一种用于通过内部等离子体沉积工艺来制造用于光纤的初级预制棒的方法。 该过程包括以下步骤：提供具有供给侧和排放侧的中空衬底管; 产生由电磁辐射的装置具有在所述中空衬底管的内部第一反应条件的第一等离子体反应区，用于实现非玻璃化硅石层的沉积在所述的内表面的至少一部分衬底管，在或接近一个 反转点处的排出侧，以提供具有在至少其内表面的一部分非玻璃化层的管的基底。 随后创建第二等离子体反应区中，所述中空衬底管的内部具有第二反应条件通过电磁辐射的装置，用于在所述玻璃化硅石层的沉积衬底上具有至少其内部的一部分非玻璃化层管 表面。 具有沉积在衬底管的非玻璃化并玻璃化的二氧化硅层从而得到。 将含有沉积在衬底管非玻璃化和玻璃化，获得二氧化硅层被冷却到导致对主玻璃预制件的所述前体。

    Single mode optical fiber
    8.
    发明公开
    Single mode optical fiber 有权
    单模-Glasfaser

    公开(公告)号：EP2527893A1

    公开(公告)日：2012-11-28

    申请号：EP11305654.3

    申请日：2011-05-27

    申请人： Draka Comteq BV

    发明人： Sillard, Pierre ,  Bigot-Astruc, Marianne

    IPC分类号： G02B6/036

    CPC分类号： G02B6/0365 ,  C03B37/01211 ,  C03B37/01413 ,  C03B37/01807 ,  C03B37/01861 ,  C03B2201/02 ,  C03B2201/12 ,  G02B6/03605 ,  G02B6/03627 ,  G02B6/03666

    摘要： A single mode optical fiber comprises from center to periphery a core, at least first and second depressed claddings, and an outer cladding. The core has a radius (R co ) comprised between 3.5 µm and 5.5 µm and an index difference with the outer cladding (Dn co -Dn out ) comprised between 0 and 3.10 -3 ; the first depressed cladding has a radius (R cl1 ) comprised between 9 µm and 15 µm and an index difference with the outer cladding (Dn cl1 -Dn out ) comprised between -5.5.10 -3 and -2.5.10 -3 ; the second depressed cladding has a radius (R cl2 ) comprised between 38 µm and 42 µm and an index difference with the first depressed cladding (Dn cl2 -Dn cl1 ) comprised between -0.5.10 -3 and 0.5.10 -3 ; and the outer cladding has a radius comprised between 61,5 µm and 63,5 µm.
    A fiber with reduced attenuation can be manufactured at reduced cost.

    摘要翻译： 单模光纤包括中心至外缘的芯，至少第一和第二凹陷包层以及外包层。 芯具有在3.5μm和5.5μm之间的半径（R co）和与外包层（Dn co -Dn out）的折射率差在0和3.10 -3之间; 第一凹陷包层具有在9μm和15μm之间的半径（R cl1）和与外包层（Dn cl1 -Dn out）的折射率差在-5.5.10-3和-2.5.10-3之间; 所述第二凹陷包层具有包括在38μm和42μm之间的半径（R cl2）和与所述第一凹陷包层（Dn cl2 -Dn cl1）的折射率差在-0.5.10-3和0.5.10-3之间; 并且外包层具有61.5μm和63,5μm之间的半径。 可以以降低的成本制造具有衰减衰减的纤维。

    Method for producing a glass optical fiber preform
    9.
    发明公开
    Method for producing a glass optical fiber preform 有权
    生产玻璃光纤预制棒的方法

    公开(公告)号：EP2484644A1

    公开(公告)日：2012-08-08

    申请号：EP12153445.7

    申请日：2012-02-01

    申请人： Sumitomo Electric Industries, Ltd.

    发明人： Tamura, Yoshiaki ,  Hirano, Masaaki ,  Haruna, Tetsuya

    IPC分类号： C03B37/018 ,  C03B37/012

    CPC分类号： C03B37/01869 ,  C03B37/01228 ,  C03B37/01861 ,  C03B2201/07 ,  C03B2201/075 ,  C03B2201/12 ,  C03B2201/20 ,  C03B2201/50

    摘要： A method for producing an optical fiber preform according to the present invention includes a collapse step of collapsing a silica-based glass tube by heating with a heat source continuously traversed in the longitudinal direction of the glass tube to form a first glass rod to be formed into a core part or part of a core part of an optical fiber, the glass tube having an inner surface doped with an alkali metal, in which the glass tube has a maximum alkali metal concentration of 500 to 20,000 atomic ppm, a maximum chlorine concentration of 0 to 1000 atomic ppm, and a maximum fluorine concentration of 0 to 10,000 atomic ppm, and in which in the collapse step, the maximum temperature of the outer surface of the glass tube is 2000°C to 2250°C, and the traverse speed of the heat source is 30 mm/min to 100 mm/min.

    摘要翻译： 根据本发明的用于制造光纤预制棒的方法包括：通过加热利用在玻璃管的纵向方向上连续横穿的热源使二氧化硅基玻璃管坍塌以形成将要形成的第一玻璃棒的坍缩步骤 进入光纤的芯部分的核心部分或部分，该玻璃管具有用碱金属掺杂的内表面，其中玻璃管的最大碱金属浓度为500至20,000原子ppm，最大氯浓度 为0〜1000原子ppm，最大氟浓度为0〜10000原子ppm，并且在该崩解工序中，玻璃管的外表面的最高温度为2000℃〜2250℃，横轴 热源的速度为30毫米/分钟至100毫米/分钟。

    METHOD FOR MAKING OPTICAL FIBER PREFORM HAVING ULTIMATELY LOW PMD THROUGH IMPROVEMENT OF OVALITY
    10.
    发明公开
    METHOD FOR MAKING OPTICAL FIBER PREFORM HAVING ULTIMATELY LOW PMD THROUGH IMPROVEMENT OF OVALITY 审中-公开
    用于生产光纤预型件最终低PMD通过改进椭圆度

    公开(公告)号：EP1535091A4

    公开(公告)日：2006-03-01

    申请号：EP03725850

    申请日：2003-05-28

    申请人： LG CABLE LTD

    发明人： KANG BYUNG-YOON ,  MOON JOON-HO ,  LEE BONG-HOON ,  PARK KYOUNG-SOON ,  KIM JUNG-MIN

    IPC分类号： C03B37/018

    CPC分类号： C03B37/01861 ,  C03B37/01869 ,  Y02P40/57

    摘要： A method for making an optical fiber preform having an ultimately low PMD (Polarization Mode Dispersion) through improvement of ovality is provided. This method has several collapse steps for collapsing an optical fiber preform having a clad/core deposition layer formed in a preform tube in which a rate of collapse is 0.01~0.06 mm/min at each collapsing step. By using this method, ovality and PMD of the optical fiber preform may be improved.

    摘要翻译： 一种用于在具有最终的低PMD（偏振模色散）通过改进椭圆度，提供一种制造光纤预制件的方法。 该方法具有对光纤母材的折叠具有在预成型件管，其崩塌的速率是在每个步骤塌陷0点01分至0点06毫米/分钟形成的包层/芯层沉积几个崩溃步骤。 通过使用光纤预制件的方法中，椭圆度和PMD可以得到改善。