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    Multi-core optical fiber
    2.
    发明专利
    Multi-core optical fiber 有权

    公开(公告)号：JP5267481B2

    公开(公告)日：2013-08-21

    申请号：JP2010033776

    申请日：2010-02-18

    Applicant: 住友電気工業株式会社

    Inventor： 拓志 永島 ,  稔樹 樽 ,  隆 佐々木

    IPC: G02B6/04 ,  G02B6/02

    CPC classification number: G02B6/02042

    Abstract: A multi-core optical fibre 1A in which a plurality of cores can easily be identified even in the case where they are symmetrically arranged in its section has seven cores 10 to 16, a visual recognition marker 20, and a shared cladding 30 enclosing the seven cores 10 to 16 and the visual recognition marker 20. The cores 10 to 16 and the visual recognition marker 20 extend along the fibre-axis direction. The respective refractive index of the cores 10 to 16 is higher than the refractive index of the cladding 30. The refractive index of the visual recognition marker 20 differs from that of the cladding 30. In the cross-section perpendicular to the fibre-axis, the cores 10 to 16 are arranged such that they have 6-fold rotational symmetry and line symmetry. The visual recognition marker 20 is arranged at a position which breaks such symmetry.

    Optical fiber
    7.
    发明专利
    Optical fiber 有权

    公开(公告)号：JP5263667B2

    公开(公告)日：2013-08-14

    申请号：JP2008256431

    申请日：2008-10-01

    Applicant: 住友電気工業株式会社 ,  国立大学法人北海道大学

    Inventor： 稔樹 樽 ,  拓志 永島 ,  隆 佐々木 ,  晋聖 齊藤

    IPC: G02B6/00

    Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber (a photonic bandgap fiber (PBGF)) used as an optical filter for a narrower band. SOLUTION: The PBGF is an optical fiber including: a core region 10; a clad region 20 surrounding the core region; and a jacket region 30 surrounding the clad region. The PBGF has a refractive index distribution uniform along a fiber axis. The clad region 20 has a two-dimensional periodic structure, in the cross section perpendicular to the fiber axis, in which high refractive index regions 21A, 21B are arranged in a triangle lattice in a low refractive index back region 22. The core region 10 is formed of a defect of the two-dimensional periodic structure at the central part of the cross section. The two-dimensional periodic structure of the clad region 20 includes M kinds of different periodic structures. Each region of the M kinds of different periodic structures of the clad region 20 is brought into contact with the jacket region 30. COPYRIGHT: (C)2010,JPO&INPIT

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