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    SINGLE-MODE OPTICAL FIBER AND MANUFACTURE METHOD THEREOF
    166.
    发明公开
    SINGLE-MODE OPTICAL FIBER AND MANUFACTURE METHOD THEREOF 有权
    单模光纤及其制造方法

    公开(公告)号：EP2420876A4

    公开(公告)日：2013-11-20

    申请号：EP10737460

    申请日：2010-02-26

    Applicant: YANGTZE OPTICAL FIBRE AND CABLE COMPANY LTD

    Inventor： HAN QINGRONG ,  YANG CHEN ,  LI JING ,  LUO JIE

    IPC: C03B37/018 ,  G02B6/036

    CPC classification number: C03B37/018 ,  C03B37/01211 ,  C03B37/014 ,  C03B37/0183 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/23 ,  C03B2203/24 ,  C23C16/045 ,  C23C16/402 ,  C23C16/56 ,  G02B6/02238 ,  G02B6/0283 ,  G02B6/0365

    Abstract: A single mode fiber comprises a core, an inner cladding, a depressed cladding and an outer cladding composed of pure silica glass. The core is composed of silica glass doped with germanium and fluorine, with a diameter (a) of 8.0-8.8 µm, a relative refractive index difference (” 1 ) of 0.35-0.38%, and the contribution of fluoride (” F ) is -0.09 ± 0.02%. The inner cladding is composed of silica glass doped with germanium and fluorine, with a diameter (b) of 18-21 µm and a relative refractive index difference (” 2 ) of 0 ± 0.02%. The depressed cladding is composed of silica glass doped with fluorine, with a diameter (c) of 26-36 µm and a relative refractive index difference (” 32 ) at the external interface thereof is between -0.22 and -0.35%, and a relative refractive index difference (” 31 ) at the internal interface thereof is between -0.20 and -0.3 5%, and ” 32 ‰¤” 31 . The fiber is able to improve the fiber bending resistance, prevent the additional stresses generated by fiber bending from passing on to the core for avoiding the increase of attenuation, thereby effectively improving the mechanical properties and service life of the fiber.

    SINGLE-MODE OPTICAL FIBER AND MANUFACTURE METHOD THEREOF
    167.
    发明公开
    SINGLE-MODE OPTICAL FIBER AND MANUFACTURE METHOD THEREOF 有权
    EINMODENFASER UND HERSTELLUNGSVERFAHRENDAFÜR

    公开(公告)号：EP2420876A1

    公开(公告)日：2012-02-22

    申请号：EP10737460.5

    申请日：2010-02-26

    Applicant: Yangtze Optical Fibre And Cable Company, Ltd.

    Inventor： HAN, Qingrong ,  YANG, Chen ,  LI, Jing ,  LUO, Jie

    IPC: G02B6/036 ,  C23C16/44 ,  C23C16/30 ,  C03B37/018 ,  C03B37/027

    CPC classification number: C03B37/018 ,  C03B37/01211 ,  C03B37/014 ,  C03B37/0183 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/23 ,  C03B2203/24 ,  C23C16/045 ,  C23C16/402 ,  C23C16/56 ,  G02B6/02238 ,  G02B6/0283 ,  G02B6/0365

    Abstract: A single mode fiber comprises a core, an inner cladding, a depressed cladding and an outer cladding composed of pure silica glass. The core is composed of silica glass doped with germanium and fluorine, with a diameter (a) of 8.0-8.8 µm, a relative refractive index difference (Δ 1 ) of 0.35-0.38%, and the contribution of fluoride (Δ F ) is -0.09 ± 0.02%. The inner cladding is composed of silica glass doped with germanium and fluorine, with a diameter (b) of 18-21 µm and a relative refractive index difference (Δ 2 ) of 0 ± 0.02%. The depressed cladding is composed of silica glass doped with fluorine, with a diameter (c) of 26-36 µm and a relative refractive index difference (Δ 32 ) at the external interface thereof is between -0.22 and -0.35%, and a relative refractive index difference (Δ 31 ) at the internal interface thereof is between -0.20 and -0.3 5%, and Δ 32 ≤Δ 31 . The fiber is able to improve the fiber bending resistance, prevent the additional stresses generated by fiber bending from passing on to the core for avoiding the increase of attenuation, thereby effectively improving the mechanical properties and service life of the fiber.

    Abstract translation: 单模光纤包括芯，内包层，凹陷包层和由纯二氧化硅玻璃构成的外包层。 核心由掺杂有锗和氟的石英玻璃组成，直径（a）为8.0-8.8μm，相对折射率差（“1”）为0.35-0.38％，氟化物（“F”）的贡献为 -0.09±0.02％。 内包层由掺杂有锗和氟的石英玻璃构成，直径（b）为18-21μm，相对折射率差（“2”）为0±0.02％。 凹陷的包层由掺杂氟的石英玻璃构成，直径（c）为26-36μm，其外界面处的相对折射率差（“32”）在-0.22和-0.35％之间，相对 其内部界面处的折射率差（“31”）在-0.20和-0.3±5％之间，“32‰¤”31。 纤维能够提高纤维的抗弯曲性，防止纤维弯曲产生的附加应力传递到纤芯上，以避免增加衰减，从而有效提高纤维的机械性能和使用寿命。

    A method of fabricating an optical fiber preform
    168.
    发明公开
    A method of fabricating an optical fiber preform 有权
    VERFAHREN ZUR HERSTELLUNG EINER OPTISCHEN FASERVORFORM

    公开(公告)号：EP2418181A1

    公开(公告)日：2012-02-15

    申请号：EP11174603.8

    申请日：2011-07-20

    Applicant: Draka Comteq B.V.

    Inventor： De Montmorrilon, Louis-Anne ,  Gooijer , Frans ,  Sillard, Pierre

    IPC: C03B37/012 ,  C03B37/018

    CPC classification number: C03B37/01807 ,  C03B37/01211 ,  C03B37/0124 ,  C03B37/0183 ,  C03B37/01861 ,  C03B37/01869 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2203/23 ,  C03B2203/24 ,  Y02P40/57 ,  Y10T428/2935 ,  Y10T428/2964

    Abstract: A method of fabricating an optical fiber preform that comprises, from the center towards the periphery, a central core, intermediate cladding, a buried trench, and outer cladding, the method comprising the steps of:
    · prepaying a first rod constituting at least the central core, the first rod being prepared by chemical vapor deposition (CVD) in a first tube;
    · prepaying a hollow second rod constituting at least the buried trench, the second rod being prepared by chemical vapor deposition (CVD) in a second tube; and
    · fitting the second rod as a sleeve on the first rod.

    Such a method serves to fabricate large-capacity fiber preforms while using deposition benches of small and/or medium deposition capacity.

    Abstract translation: 一种制造光纤预制棒的方法，包括从中心到周边的中心芯，中间包层，埋入沟槽和外包层，该方法包括以下步骤：·预先构成至少构成中心的第一杆 芯，第一杆通过化学气相沉积（CVD）在第一管中制备; ·预先构成至少构成所述埋入沟槽的中空第二杆，所述第二杆通过化学气相沉积（CVD）在第二管中制备; 以及·将所述第二杆作为套筒安装在所述第一杆上。 这种方法用于在使用具有小和/或中等沉积能力的沉积台的同时制造大容量纤维预制件。

    Optical fiber and method for manufacturing same
    169.
    发明公开
    Optical fiber and method for manufacturing same 审中-公开
    Glasfaser und Herstellungsverfahrendafür

    公开(公告)号：EP2407436A1

    公开(公告)日：2012-01-18

    申请号：EP11173703.7

    申请日：2011-07-12

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Haruna, Tetsuya ,  Hirano, Masaaki ,  Hikichi, Nobuhiro

    IPC: C03B37/027 ,  G02B6/036

    CPC classification number: G02B6/03627 ,  C03B37/02727 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/23 ,  C03B2205/40 ,  G02B6/0281 ,  G02B6/03655

    Abstract: Provided is an optical fiber having a large relative refractive index difference and a reduced transmission loss, as well as a manufacturing method therefor. An optical fiber preform (100), which is made of silica glass as the main element and which includes a core region having a relative refractive index difference of 2.0% or more and less than 3.0% on the basis of the refractive index of pure silica glass and a first cladding region provided around the core region and having a relative refractive index difference of -0.8% or more and less than -0.3% on the basis of the refractive index of pure silica glass, is drawn into a glass fiber. The glass fiber thus drawn is passed through an annealing furnace (21) installed below a drawing furnace (11), whereby the cooling rate of the glass fiber is restrained as compared with the case where it is cooled by air.

    Abstract translation: 提供了具有大的相对折射率差和减小的传输损耗的光纤，以及其制造方法。 一种由石英玻璃作为主要元件制成的光纤预制件（100），其基于纯二氧化硅的折射率，包括相对折射率差为2.0％以上且小于3.0％的芯区域 玻璃和围绕芯区设置并且基于纯石英玻璃的折射率具有-0.8％以上且小于-0.3％的相对折射率差的第一包层区域被拉伸到玻璃纤维中。 将如此拉伸的玻璃纤维通过安装在拉丝炉（11）下方的退火炉（21），由此与通过空气冷却的情况相比，玻璃纤维的冷却速度得到抑制。

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