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    Optical fiber, optical transmission line, and method for manufacturing optical fiber
    2.
    发明授权
    Optical fiber, optical transmission line, and method for manufacturing optical fiber 有权
    光纤，光传输线以及光纤制造方法

    公开(公告)号：US09188735B2

    公开(公告)日：2015-11-17

    申请号：US13887860

    申请日：2013-05-06

    Applicant: FUJIKURA LTD. ,  OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION

    Inventor： Ryo Maruyama ,  Nobuo Kuwaki ,  Shoichiro Matsuo ,  Masaharu Ohashi

    IPC: G02B6/02 ,  G02B6/036

    CPC classification number: G02B6/02 ,  G02B6/02019 ,  G02B6/03627

    Abstract: An optical fiber (1) includes (i) an inner core (111) whose refractive index distribution has an α profile, (ii) an outer core (112) which surrounds the inner core (111), and (iii) a clad (12) which surrounds the outer core (112). In the optical fiber (1), Rd is set to not less than 0.15, where Rd is a ratio of a refractive index difference between the outer core (112) and the clad (12) to a refractive index difference between a center part of the inner core (111) and the clad (12).

    Abstract translation: 光纤（1）包括（i）其折射率分布具有α轮廓的内芯（111），（ii）围绕内芯（111）的外芯（112），以及（iii）包层 12）围绕外芯（112）。 在光纤（1）中，Rd被设定为不小于0.15，其中Rd是外芯（112）和包层（12）之间的折射率差之比与中心部分之间的折射率差 内芯（111）和包层（12）。

    Optical fiber
    4.
    发明授权
    Optical fiber 有权

    公开(公告)号：US11860406B2

    公开(公告)日：2024-01-02

    申请号：US17297716

    申请日：2020-11-06

    Applicant: Fujikura Ltd.

    Inventor： Ryo Maruyama

    IPC: G02B6/02

    CPC classification number: G02B6/02395

    Abstract: An optical fiber includes a glass portion, a primary coating layer, and a secondary coating layer. In the optical fiber, a value of microbend loss characteristic factor FμBL_GΔβ is 6.1 ([GPa−1·μm−2.5/rad8]·10−12) or less when represented by

    FμBL_GΔβ=FμBL_G×FμBL_Δβ,

    where FμBL_G is geometry microbend loss characteristic and FμBL_Δβ is optical microbend loss characteristic.

    OPTICAL FIBER
    5.
    发明申请
    OPTICAL FIBER 有权

    公开(公告)号：US20220026632A1

    公开(公告)日：2022-01-27

    申请号：US17297716

    申请日：2020-11-06

    Applicant: Fujikura Ltd.

    Inventor： Ryo Maruyama

    IPC: G02B6/02

    Abstract: An optical fiber includes a glass portion, a primary coating layer, and a secondary coating layer. In the optical fiber, a value of microbend loss characteristic factor FμBL_GΔβ is 6.1 ([GPa−1·μm−2.5/rad8]·10−12) or less when represented by FμBL_GΔβ=FμBL_G×FμBL_Δβ, where FμBL_G is geometry microbend loss characteristic and FμBL_Δβ is optical microbend loss characteristic.

    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
    6.
    发明申请
    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME 审中-公开

    公开(公告)号：US20190025503A1

    公开(公告)日：2019-01-24

    申请号：US15877697

    申请日：2018-01-23

    Applicant: FUJIKURA LTD.

    Inventor： Ryo Maruyama

    IPC: G02B6/036 ,  G02B6/028 ,  G02B6/02

    CPC classification number: G02B6/03627 ,  G02B6/02009 ,  G02B6/0281

    Abstract: An optical fiber includes a core, a depressed layer surrounding the core, and a cladding surrounding the depressed layer, where a refractive index profile of the core is an α power distribution in which an index α is 3 or more and 6 or less, a relative refractive index difference Δ− of the depressed layer with respect to the adding is set such that an absolute value |Δ−| thereof is 0.01% or more and 0.05% or less, a radius r1 of the core and an outer circumference radius r2 of the depressed layer are set such that a ratio r1/r2 thereof is 0.2 or more and 0.5 or less, a cable cutoff wavelength λcc of 22 m is 1260 nm or less, and a mode field diameter MFD at a wavelength of 1310 nm is 8.6 μm or more and 9.5 μm or less.

    Optical fiber
    8.
    发明授权
    Optical fiber 有权

    公开(公告)号：US11808972B2

    公开(公告)日：2023-11-07

    申请号：US17743884

    申请日：2022-05-13

    Applicant: FUJIKURA LTD.

    Inventor： Ryo Maruyama ,  Kenji Yamashiro

    IPC: G02B6/02

    CPC classification number: G02B6/02395 ,  G02B6/02214

    Abstract: An optical fiber includes a glass portion, a primary coating layer, and a secondary coating layer. In the optical fiber, a value of microbend loss characteristic factor FμBL_GΔβ is 6.1 ([GPa−1·μm−2.5/rad8]·10−12) or less when represented by

    FμBL_GΔβ=FμBL_G×FμBL_Δβ,

    where FμBL_G is geometry microbend loss characteristic and FμBL_Δβ is optical microbend loss characteristic.

    Optical fiber
    9.
    发明授权
    Optical fiber 有权

    公开(公告)号：US11048039B2

    公开(公告)日：2021-06-29

    申请号：US16956131

    申请日：2019-02-01

    Applicant: Fujikura Ltd.

    Inventor： Ryo Maruyama

    IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036

    Abstract: An optical fiber includes: a core; a depressed layer surrounding the core; and a cladding surrounding the depressed layer. A refractive index profile of the core is an α-th power distribution having an index α of 1.0 or more and 2.9 or less. A relative refractive index difference Δ− of the depressed layer with respect to the cladding has an absolute value |Δ−| that is 0.05% or more and 0.15% or less. A ratio r1/r2 of a radius r1 of the core to an outer radius r2 of the depressed layer is 0.35 or more and 0.60 or less. A cable cutoff wavelength λcc of 22 m is less than 1.26 μm. A mode field diameter at a wavelength of 1.31 inn is larger than 8.6 inn and smaller than 9.5 μm.

    Optical fiber and method of manufacturing the same
    10.
    发明授权
    Optical fiber and method of manufacturing the same 有权

    公开(公告)号：US10422948B2

    公开(公告)日：2019-09-24

    申请号：US15877697

    申请日：2018-01-23

    Applicant: FUJIKURA LTD.

    Inventor： Ryo Maruyama

    IPC: G02B6/036 ,  G02B6/02 ,  G02B6/028

    Abstract: An optical fiber includes a core, a depressed layer surrounding the core, and a cladding surrounding the depressed layer, where a refractive index profile of the core is an α power distribution in which an index α is 3 or more and 6 or less, a relative refractive index difference Δ− of the depressed layer with respect to the adding is set such that an absolute value |Δ−| thereof is 0.01% or more and 0.05% or less, a radius r1 of the core and an outer circumference radius r2 of the depressed layer are set such that a ratio r1/r2 thereof is 0.2 or more and 0.5 or less, a cable cutoff wavelength λcc of 22 m is 1260 nm or less, and a mode field diameter MFD at a wavelength of 1310 nm is 8.6 μm or more and 9.5 μm or less.

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