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    OPTICAL FIBER GLASS PREFORM MANUFACTURING METHOD
    1.
    发明申请
    OPTICAL FIBER GLASS PREFORM MANUFACTURING METHOD 审中-公开

    公开(公告)号：US20180237330A1

    公开(公告)日：2018-08-23

    申请号：US15958356

    申请日：2018-04-20

    Applicant: FURUKAWA ELECTRIC CO., LTD.

    Inventor： Seiichi SHINADA ,  Akihiro KANAO

    IPC: C03B37/018

    CPC classification number: C03B37/018 ,  C03B37/0142 ,  C03B37/01815 ,  C03B2203/24 ,  C03B2207/64 ,  C03B2207/70

    Abstract: A method of manufacturing an optical fiber glass preform, the method comprising depositing glass particles on a base material, the glass particles being generated by glass making feedstock gas being supplied while a burner and the base material that is rotating are reciprocated relatively to each other, wherein when a portion corresponding to an outer diameter equal to or more than 0.80 L and equal to or less than L is deposited, wherein L represents a final outer diameter of a part of the optical fiber glass preform manufactured, the part being formed by the deposition of the glass particles, the deposition is performed under a first condition where an angle formed by a first line extending from a center O of a cross section of the base material to a rotational position r0 at which one round trip of the relative reciprocation starts and a second line extending from the center O to a rotational position r1 at which the one round trip of the relative reciprocation ends is an angle excluding 0°, 120°, 240°, 72°, 144°, 216°, and 288°; or the deposition is performed under a second condition where the angle is 120° or 240°, thereby to deposit the glass particles to a thickness corresponding to a thickness equal to or less than 0.03 L; or the deposition is performed under a third condition where the angle is 72°, 144°, 216°, or 288°, thereby to deposit the glass particles to a thickness corresponding to a thickness equal to or less than 0.02 L; or the deposition is performed under a fourth condition where the angle is 0°, thereby to deposit the glass particles to a thickness corresponding to a thickness equal to or less than 0.01 L.

    METHOD OF MANUFACTURING PREFORMS FOR OPTICAL FIBRES HAVING LOW WATER PEAK
    7.
    发明申请
    METHOD OF MANUFACTURING PREFORMS FOR OPTICAL FIBRES HAVING LOW WATER PEAK 有权
    制造具有低水峰值的光纤的预制件的方法

    公开(公告)号：US20150336840A1

    公开(公告)日：2015-11-26

    申请号：US14758018

    申请日：2012-12-28

    Applicant: PRYSMIAN S.P.A.

    Inventor： Antonio Adigrat ,  Valeria Caronna ,  Franco Cocchini ,  Antonio Collaro ,  Stefano Grieco ,  Ida Nivelli

    IPC: C03B37/018 ,  C03B37/027

    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。

    APPARATUS AND METHOD FOR CARRYING OUT A PLASMA DEPOSITION PROCESS
    8.
    发明申请
    APPARATUS AND METHOD FOR CARRYING OUT A PLASMA DEPOSITION PROCESS 有权
    装置和方法进行等离子沉积工艺

    公开(公告)号：US20150336837A1

    公开(公告)日：2015-11-26

    申请号：US14715726

    申请日：2015-05-19

    Applicant: Draka Comteq B.V.

    Inventor： Igor Milicevic ,  Mattheus Jacobus Nicolaas Van Stralen ,  Johannes Antoon Hartsuiker ,  Gertjan Krabshuis

    IPC: C03B37/018

    CPC classification number: C03B37/0183 ,  C03B37/018 ,  C03B2201/12 ,  C03B2201/31 ,  C23C16/045 ,  C23C16/401 ,  C23C16/511

    Abstract: A method for carrying out a plasma deposition process including the steps of providing a substrate tube, supplying dopant-containing glass-forming gases to the substrate including a main gas flow and one or more secondary gas flows, inducing a plasma in the substrate tube, moving a reaction zone back and forth in strokes between a reversal point near the supply side and a reversal point near the discharge side, and interrupting the secondary gas flow during a portion of each stroke, each interruption having a start point and an end point within the same stroke.

    Abstract translation: 一种用于进行等离子体沉积工艺的方法，包括以下步骤：提供衬底管，将包含主气流和一个或多个二次气流的含掺杂剂的玻璃形成气体供应到衬底，在衬底管中引入等离子体， 在供应侧附近的反转点和排出侧附近的反转点之间的冲程中来回移动反应区，并且在每次冲程的一部分期间中断二次气流，每个中断具有起始点和终点 相同的行程。

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