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    Optical fiber and method for producing the same
    201.
    发明专利
    Optical fiber and method for producing the same 审中-公开
    光纤及其制造方法

    公开(公告)号：JP2012020908A

    公开(公告)日：2012-02-02

    申请号：JP2010160966

    申请日：2010-07-15

    Applicant: Sumitomo Electric Ind Ltd ,  住友電気工業株式会社

    Inventor： HARUNA TETSUYA ,  HIRANO MASAAKI ,  HIKICHI NOBUHIRO

    IPC: C03B37/027 ,  G02B6/02 ,  G02B6/036

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

    Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber having a large relative refractive index difference and a reduced transmission loss, and to provide a method for producing the same.SOLUTION: An optical fiber preform 100, which is made of silica glass as the main component 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 reduced as compared with the case where it is cooled by air. As a result, the randomness of the bonds of atoms in glass is reduced to allow Rayleigh scattering to be suppressed. Therefore, even in the case where the relative index difference is increased, the transmission loss of the optical fiber can be reduced.

    Abstract translation: 要解决的问题：提供一种相对折射率差大且传输损失减少的光纤，并提供一种制造该光纤的方法。 解决方案：一种由石英玻璃作为主要成分制成的光纤预制件100，其基于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 的纯二氧化硅玻璃和设置在芯部区域周围的基于纯石英玻璃的折射率为-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成玻璃 纤维。 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降低。 结果，玻璃中的原子键的随机性被降低以允许抑制瑞利散射。 因此，即使在相对折射率差增加的情况下，也可以减小光纤的传输损耗。 版权所有（C）2012，JPO＆INPIT

    Holey fiber, and method for manufacturing holey fiber
    203.
    发明专利
    Holey fiber, and method for manufacturing holey fiber 审中-公开
    孔纤维和制造孔眼纤维的方法

    公开(公告)号：JP2009015294A

    公开(公告)日：2009-01-22

    申请号：JP2008031465

    申请日：2008-02-13

    Applicant: Furukawa Electric Co Ltd:The ,  古河電気工業株式会社

    Inventor： MUKASA KAZUNORI ,  SUGIZAKI RYUICHI

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/027 ,  G02B6/032 ,  G02B6/036

    CPC classification number: C03B37/02781 ,  C03B2201/08 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/14 ,  C03B2203/22 ,  C03B2203/23 ,  C03B2203/42 ,  G02B6/02019 ,  G02B6/02266 ,  G02B6/02333 ,  G02B6/02361 ,  Y02P40/57

    Abstract: PROBLEM TO BE SOLVED: To provide a holey fiber with a low transmission loss, and a method for easily manufacturing the holey fiber with the low transmission loss. SOLUTION: The holey fiber comprises a core part located at the center, and a clad part located at the outer periphery of the core part and having voids formed in layer shape around the core part. The clad part has an inner layer and an outer layer located at the outer periphery of the inner layer. The viscosity of the core part and the inner layer of the clad part is lower than the viscosity of the outer layer of the clad part. The voids up to at least the second layer are preferably formed in the inner layer of the clad part. COPYRIGHT: (C)2009,JPO&INPIT

    Abstract translation: 要解决的问题：提供具有低传输损耗的多孔纤维，以及用于容易地制造具有低传输损耗的多孔纤维的方法。 解决方案：多孔纤维包括位于中心的芯部和位于芯部的外周的包层部，并且具有围绕芯部形成为层状的空隙。 包层部具有位于内层的外周的内层和外层。 核心部分和包层部分的内层的粘度低于包层部分的外层的粘度。 至少第二层的空隙优选形成在包层部分的内层中。 版权所有（C）2009，JPO＆INPIT

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