公开(公告)号：US20250147230A1

公开(公告)日：2025-05-08

申请号：US19014700

申请日：2025-01-09

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kuniaki ISHIZUKI ,  Mitsuhiro IWAYA

IPC: G02B6/02 ,  C03C25/1065

Abstract: The present invention intends to suppress curing of a primary layer over time after manufacturing an optical fiber and to effectively suppress microbend loss. The optical fiber according to the present invention including a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber and a secondary layer formed of a second ultraviolet curing resin covering the primary layer. A Young's modulus of the primary layer is larger than or equal to 0.2 MPa and smaller than or equal to 2.1 MPa. The primary layer includes at least one of an alkoxysilane-derived chemical structure or a halosilane-derived chemical structure.

公开(公告)号：US20240116808A1

公开(公告)日：2024-04-11

申请号：US18536408

申请日：2023-12-12

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kuniaki ISHIZUKI ,  Minoru KASAHARA ,  Mitsuhiro IWAYA

IPC: C03C25/1065 ,  C03C25/105

CPC classification number: C03C25/1065 ,  C03C25/105 ,  C03C2218/32

Abstract: A colored optical fiber includes a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber and a secondary layer formed of a second ultraviolet curing resin covering the primary layer. An outer diameter of the secondary layer is smaller than or equal to 210 μm. A Young's modulus of the primary layer is smaller than or equal to 88% with respect to a saturated Young's modulus of the primary layer.

公开(公告)号：US20170168247A1

公开(公告)日：2017-06-15

申请号：US15443987

申请日：2017-02-27

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Tsunetoshi SAITO ,  Katsuki SUEMATSU ,  Mitsuhiro IWAYA ,  Kohei KAWASAKI ,  Masahito MORIMOTO

IPC: G02B6/38

CPC classification number: G02B6/3885 ,  G02B6/3834 ,  G02B6/3839 ,  G02B6/3843 ,  G02B6/40

Abstract: A plurality of holes are formed in a ferrule. The holes are at sites penetrated by the tips of optical fibers. An opening is formed in the upper surface of the ferrule and an internal housing section is exposed from the opening. The housing section is at a site at which an optical fiber holding member is housed. The optical fibers are held by the optical fiber holding member. The optical fibers are multi-core fibers. In other words, the optical fibers have a specified axis of symmetry in a cross-section vertical to the longitudinal direction of the optical fibers and have orientation relative to a rotation direction having the longitudinal direction as the axis thereof.

公开(公告)号：US20230418015A1

公开(公告)日：2023-12-28

申请号：US18462856

申请日：2023-09-07

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kuniaki ISHIZUKI ,  Minoru KASAHARA ,  Mitsuhiro IWAYA

IPC: G02B6/44

CPC classification number: G02B6/4482 ,  G02B6/448

Abstract: A colored optical fiber comprises a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein a Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer, and wherein the saturated Young's modulus of the primary layer is smaller than or equal to 0.85 MPa.

公开(公告)号：US20230257301A1

公开(公告)日：2023-08-17

申请号：US18305485

申请日：2023-04-24

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kuniaki ISHIZUKI ,  Minoru KASAHARA ,  Mitsuhiro IWAYA

IPC: C03C25/6226 ,  G02B6/44 ,  C03C25/1065 ,  C03C25/105

CPC classification number: C03C25/6226 ,  G02B6/4403 ,  C03C25/1065 ,  C03C25/105 ,  C03C2218/32

Abstract: Provided is a colored optical fiber of which a primary layer is easily formed. The colored optical fiber includes a bare optical fiber, a primary layer formed of an ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of an ultraviolet curing resin covering the primary layer. Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer. The saturated Young's modulus of the primary layer is larger than or equal to 0.84 MPa.

公开(公告)号：US20230011146A1

公开(公告)日：2023-01-12

申请号：US17932573

申请日：2022-09-15

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kengo WATANABE ,  Mitsuhiro IWAYA ,  Masayoshi TSUKAMOTO ,  Katsuki SUEMATSU

IPC: G02B6/38

Abstract: The present disclosure relates to an optical connector includes at least one optical fiber; and a lens element including at least one lens that couples light to an end face of the optical fiber. The distance FLh between the end face of the optical fiber and a vertex of the lens is expressed by the sum of the distance FL from the vertex of the lens to the focal point F positioned in a back face direction of the lens and the length δ between the end face of the optical fiber and the focal point F, and the length δ is longer than 10 μm.

公开(公告)号：US20250020885A1

公开(公告)日：2025-01-16

申请号：US18350855

申请日：2023-07-12

Applicant: Furukawa Electric Co., Ltd.

Inventor： Kuniaki ISHIZUKI ,  Mitsuhiro IWAYA ,  Minoru KASAHARA

IPC: G02B6/44

Abstract: An optical fiber ribbon includes a plurality of optical fibers and a ribbon layer covering the plurality of optical fibers. A Young's modulus of the ribbon layer is larger than or equal to 290 MPa and smaller than or equal to 1400 MPa. A static frictional coefficient between a plurality of the optical fiber ribbons is larger than or equal to 0.71 and smaller than or equal to 1.12.

公开(公告)号：US20230358949A1

公开(公告)日：2023-11-09

申请号：US18353376

申请日：2023-07-17

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kazunori MUKASA ,  Minoru KASAHARA ,  Keiichi AISO ,  Yukihiro TSUCHIDA ,  Naoya YOMOGITA ,  Takumi SUGANE ,  Ichihiko SUGANUMA ,  Tomoaki GONOHE ,  Mitsuhiro IWAYA ,  Zoltan VARALLYAY ,  Tamas MIHALFFY

IPC: G02B6/02 ,  G02B6/036

CPC classification number: G02B6/02395 ,  G02B6/02019 ,  G02B6/03627

Abstract: An optical fiber includes: a core portion made of glass; a side core layer made of glass and enclosing the core portion; a cladding portion made of glass and enclosing the side core layer; and a coating layer including a primary layer made of resin and enclosing the cladding portion, and a secondary layer made of resin and enclosing the primary layer. The relationships Δ1>ΔClad>Δ2 and 0>Δ2 are satisfied where Δ1 represents relative refractive-index difference of average maximum refractive index of the core portion with respect to average refractive index of the cladding portion, Δ2 represents relative refractive-index difference of average refractive index of the side core layer with respect to average refractive index of the cladding portion, and ΔClad represents relative refractive-index difference of average refractive index of the cladding portion with respect to refractive index of pure silica glass.

公开(公告)号：US20210208338A1

公开(公告)日：2021-07-08

申请号：US17207882

申请日：2021-03-22

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Masanori TAKAHASHI ,  Mitsuhiro IWAYA ,  Masayoshi TSUKAMOTO

IPC: G02B6/255

Abstract: An optical connection component includes an optical fiber; a high relative refractive-index difference optical fiber that is fusion-spliced to the optical fiber and has a greater relative refractive-index difference to a cladding of a core than the optical fiber; and an accommodating member accommodating the entire length of the optical fiber and the high relative refractive-index difference optical fiber, and has a first end face on which an end face of the optical fiber on the side opposite to the fusion-spliced side is exposed to be substantially flush with the first end face, and a second end face on which an end face of the high relative refractive-index difference optical fiber on the side opposite to the fusion-spliced side is exposed to be substantially flush with the second end face. The optical fiber and the high relative refractive-index difference optical fiber are fixed to the accommodating member.

公开(公告)号：US20250136502A1

公开(公告)日：2025-05-01

申请号：US19009451

申请日：2025-01-03

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Kuniaki ISHIZUKI ,  Mitsuhiro IWAYA

IPC: C03C25/1065 ,  C03C25/105

Abstract: A colored coated optical fiber includes: a bare optical fiber; a primary layer formed of a first ultraviolet curable resin covering the bare optical fiber; and a secondary layer formed of a second ultraviolet curable resin covering the primary layer, wherein the primary layer has a carbon-sulfur bond and contains 0.03 wt % or more and 0.65 wt % or less of sulfur atoms, and wherein an increase in a Young's modulus of the primary layer due to additional ultraviolet irradiation to the primary layer is 0.09 MPa or less.