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公开(公告)号：US20170131511A1
公开(公告)日：2017-05-11
申请号：US15405770
申请日：2017-01-13
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Hiroki TANAKA , Minoru KASAHARA , Junpei WATANABE , Kenichi SUYAMA , Yoshihiro ARASHITANI
CPC classification number: G02B6/02395 , C03C25/1065 , C03C25/24 , C03C25/475 , G02B6/44 , G02B6/4403 , G02B6/4482
Abstract: The present invention provides a two-layer structure colored optical fiber which includes a colored secondary coating layer improved in collectability and separability. The two-layer structure colored optical fiber in an embodiment of the present invention includes a glass optical fiber, a primary coating layer coating the glass optical fiber, and a colored secondary coating layer coating the primary coating layer. The secondary coating layer has such characteristics that a surface cure percentage is 99% or more at an infrared absorption peak of a wave number of 1407 cm−1 and a surface kinetic friction force in Knot Test is less than 0.075 N.
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公开(公告)号：US20140301704A1
公开(公告)日：2014-10-09
申请号：US14309380
申请日：2014-06-19
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Hiroki TANAKA , Minoru SAITO , Minoru KASAHARA , Yasuo NAKAJIMA , Yoshihiro ARASHITANI
CPC classification number: G02B6/02395 , C03C25/1065 , C03C25/285 , G02B6/4403 , G02B6/4409
Abstract: A colored optical fiber including a glass optical fiber; a primary coating layer that covers the glass optical fiber; a secondary coating layer that covers the primary coating layer; and a colored layer that coats the secondary coating layer. The relaxation modulus after 24 hours at 60° C. of of the layers coated is 140 MPa or less.
Abstract translation: 包括玻璃光纤的彩色光纤; 覆盖玻璃光纤的主要涂层; 覆盖第一涂层的二次涂层; 以及涂覆第二涂层的着色层。 所涂层的60℃下24小时后的松弛模量为140MPa以下。
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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.
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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.
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公开(公告)号：US20150293325A1
公开(公告)日：2015-10-15
申请号：US14296003
申请日：2014-06-04
Applicant: Furukawa Electric Co., Ltd.
Inventor： Minoru KASAHARA , Minoru SAITO , Yoshihiro ARASHITANI
CPC classification number: G02B6/4494 , G02B6/02395 , G02B6/4403 , G02B6/4404
Abstract: The purpose of the present invention is to provide, by a configuration or method different from conventional art, a coated optical fiber enabling reduced interface delamination between a glass fiber and a primary coating layer when the coated optical fiber is immersed in water, and a reduction of transmission loss increase. A coated optical fiber according to one embodiment of the present invention is provided with a glass fiber, a primary coating layer coated on the glass fiber, a secondary coating layer coated on the primary coating layer, and a colored layer coated on the secondary coating layer. The coated optical fiber is configured so that small water bubbles are generated substantially evenly within the primary coating layer when the coated optical fiber is immersed for 200 days in warm water of 60° C.
Abstract translation: 本发明的目的是通过与传统技术不同的结构或方法来提供一种涂覆光纤，当涂覆的光纤浸入水中时，能够减少玻璃纤维和主要涂层之间的界面分层，并且还原 的传输损耗增加。 根据本发明的一个实施方案的涂覆光纤具有玻璃纤维，涂覆在玻璃纤维上的主涂层，涂覆在第一涂层上的二次涂层和涂覆在第二涂层上的着色层 。 涂覆光纤被配置为使得当涂覆的光纤在60℃的温水中浸渍200天时，在主涂层内基本上均匀地产生小的水泡。
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Patent Agency Ranking
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.
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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
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.
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公开(公告)号：US20170107145A1
公开(公告)日：2017-04-20
申请号：US15390131
申请日：2016-12-23
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kenichi SUYAMA , Yoshihiro ARASHITANI , Hiroki TANAKA , Minoru KASAHARA , Kazuyoshi AKIZUKI
Abstract: A method of producing an optical fiber, containing: (a) a resin application step of applying an ultraviolet curable resin, onto an outer circumference of an optical fiber; (b) a heating step of heating the ultraviolet curable resin; and (c) a light irradiation step of irradiating the ultraviolet curable resin with ultraviolet light emitted from a semiconductor light emitting element, in a state in which the ultraviolet curable resin is heated, to cure the ultraviolet curable resin into a coating resin.
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9.发明公开公开(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.
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公开(公告)号：US20220397732A1
公开(公告)日：2022-12-15
申请号：US17821537
申请日：2022-08-23
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Minoru KASAHARA , Yoshihiro ARASHITANI , Kouji MOCHIDUKI , Masahiro YABE
Abstract: The present invention satisfies at least one of the condition of the degree of freedom of a primary layer 11 shown in the equation (I) and the condition of the rigidity of a secondary layer 12 shown in the equation (II). Thus, a coated optical fiber 1 capable of suppressing transmission loss in a low temperature environment is provided, in which, even when an optical fiber 10 having a large effective core cross-sectional area Aeff of the optical fiber 10 at a wavelength of 1550 nm and having high microbend sensitivity is used, transmission loss in a low temperature environment can be suppressed. [Math. 1] βP×PISM
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