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公开(公告)号：US20210132314A1
公开(公告)日：2021-05-06
申请号：US17256965
申请日：2019-07-02
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Masashi KIKUCHI , Yusuke YAMADA , Hisashi IZUMITA , Junichi KAWATAKA , Kazunori KATAYAMA
IPC: G02B6/44
Abstract: An intermittent tape core wire (140) of an optical fiber cable is assembled into a cable core so that in a k core wire, an l core wire, and an m core wire composed of a multi-core optical fibers continuously adjacent in the width direction of the intermittent tape core wire (140), a difference θ between a core wire twisting direction D2km of the k core wire at a bonding portion (142) connecting the k core wire and the l core wire and a core wire twisting direction D2kl of the k core wire at a bonding portion (142) connecting the k core wire and the m core wire is different from when manufactured.
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12.发明申请公开(公告)号：US20130156390A1
公开(公告)日：2013-06-20
申请号：US13768604
申请日：2013-02-15
Applicant: Fujikura Ltd. , Nippon Telegraph and Telephone Corporation
Inventor： Takashi MATSUZAWA , Yukiko TAKE , Ken OSATO , Naoki OKADA , Yusuke YAMADA
IPC: G02B6/44
CPC classification number: G02B6/448 , G02B6/4403 , G02B6/4404 , G02B6/4405
Abstract: A manufacturing method for an optical fiber ribbon, in which: a plurality of optical fibers are arranged in parallel and the neighboring optical fibers are partially coupled with each other at given intervals in a longitudinal direction to form a subunit; and the optical fibers positioned at side edges of the neighboring subunits are partially coupled with each other at a given intervals in the longitudinal direction, includes: sending out the optical fibers in a parallel manner with intervals provided therebetween, applying an uncured resin to the optical fibers, continuously changing positions at which the uncured resin is interrupted by a plurality of interrupt members, and forming coupled portions at which the optical fibers are coupled to each other by irradiating resin curing energy, wherein a moving period or phase of the interrupt members is changed for every arbitrary optical fibers.
Abstract translation: 一种光纤带的制造方法，其中：多根光纤平行布置，并且相邻的光纤在长度方向上以给定的间隔彼此部分地耦合以形成子单元; 并且位于相邻子单元的侧边缘处的光纤在纵向方向上以给定的间隔彼此部分地耦合，包括：以平行的方式间隔地设置光纤，将未固化的树脂施加到光学 纤维，未固化树脂被多个中断构件中断的连续变化位置，以及形成通过照射树脂固化能使光纤彼此耦合的耦合部分，其中中断构件的移动周期或相位为 随着任意光纤的变化。
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公开(公告)号：US20240361551A1
公开(公告)日：2024-10-31
申请号：US18682993
申请日：2021-08-19
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yusuke YAMADA , Kazuhide NAKAJIMA
IPC: G02B6/44
CPC classification number: G02B6/4413
Abstract: An object of the present invention is to ensure low crosstalk for all multi-core optical fibers in an optical fiber cable having a plurality of identical multi-core optical fibers of non-coupling type in different spiral shapes.
An optical fiber cable according to the present disclosure is an optical fiber cable formed by twisting a plurality of units each of which is formed by bundling a plurality of identical multi-core optical fibers of non-coupling type, which includes: that all the units have the same diameter; that the units are arranged in a plurality of layers from a center in a cross section; that the units are arranged in a spiral shape for each of the layers in a longitudinal direction; that all the units included in one of the layers have the same twist pitch of the spiral shape; and that the twist pitch is different for each layer, and is set based on a curvature Rpk of the multi-core optical fiber where crosstalk is the largest.-
公开(公告)号：US20240288647A1
公开(公告)日：2024-08-29
申请号：US18570957
申请日：2021-06-18
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Akira SAKURAI , Hiroaki TANIOKA , Shigekatsu TETSUTANI , Yusuke YAMADA , Masashi KIKUCHI
IPC: G02B6/44
CPC classification number: G02B6/4431
Abstract: In order to achieve the above-mentioned object, an optical fiber cable according to the present disclosure includes an optical fiber core wire, a sheath covering the optical fiber core wire, three or more anti-tension members inside the sheath, arranged along a longitudinal axis of the optical fiber core wire, and a tear string having an outer periphery a part of which is located outside an outer circumscribed lines of outer peripheries of the three or more anti-tension members in certain cross-sections perpendicular to a longitudinal direction of the sheath, and a part of which comes in contact with an inner periphery of the sheath or is located inside the inner periphery of the sheath in a cross-section perpendicular to the longitudinal direction of the sheath.
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公开(公告)号：US20210341687A1
公开(公告)日：2021-11-04
申请号：US17285810
申请日：2019-10-09
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Masaaki TAKAYA , Kazunori KATAYAMA , Yoshiteru ABE , Ryo KOYAMA , Chisato FUKAI , Yusuke YAMADA
Abstract: An object is to provide a multifiber optical connector and an optical cable connection method capable of reducing a connection time and reducing an installation space of a connection portion. The multifiber optical connector according to the present invention includes three position adjustment units, and performs rough alignment to fine alignment of optical fiber end faces by using sequentially these position adjustment units when optical cables are connected. The multifiber optical connector simultaneously connects the end faces of the plurality of optical fibers included in the optical cables, and thus, an extra optical fiber tape is not present, and a closure needed in the related art is not necessary.
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Patent Agency Ranking
公开(公告)号：US20210124113A1
公开(公告)日：2021-04-29
申请号：US17254501
申请日：2019-06-20
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yusuke YAMADA , Masashi KIKUCHI , Hisashi IZUMITA , Junichi KAWATAKA , Kazunori KATAYAMA
Abstract: An optical fiber cable 100 includes at least one optical fiber core 140 and a sheath containing the optical fiber core. The optical fiber core 140 includes optical fibers 130. A total length of the optical fiber core 140 is longer than that of the sheath 160. The optical fiber core 140 is contained in the sheath 160 so that bending occurs in the optical fibers 130.
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公开(公告)号：US20170115461A1
公开(公告)日：2017-04-27
申请号：US15401336
申请日：2017-01-09
Applicant: FUJIKURA, LTD. , NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Akira NAMAZUE , Ken OSATO , Naoki OKADA , Yusuke YAMADA , Daisuke KAKUTA , Hisaaki NAKANE , Shinya HAMAGUCHI
CPC classification number: G02B6/4404 , G02B6/2551 , G02B6/2555 , G02B6/3636 , G02B6/4403 , G02B6/4405 , G02B6/441 , G02B6/443 , G02B6/448 , G02B6/4482 , G02B6/4489
Abstract: Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting adjacent two optical fibers 2 together, the connecting portions 3 being intermittently provided in each of a ribbon longitudinal direction and a ribbon width direction. The connecting portions 3 are each formed in such a manner as to fill resin into a gap S formed between adjacent two optical fibers 2, and both surfaces of the respective connecting portions 3 are each formed into a recess having a concave shape curved toward a center of the gap S to separate from lines 4,5 each connecting contact points of the optical fibers 2 when being placed on a horizontal surface.
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公开(公告)号：US20170115451A1
公开(公告)日：2017-04-27
申请号：US15301995
申请日：2015-04-28
Applicant: FUJIKURA, LTD. , NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Yoshie SAJIMA , Kouji TOMIKAWA , Ken OSATO , Masayoshi YAMANAKA , Naoki OKADA , Shinya HAMAGUCHI , Naoki NAKAGAWA , Yusuke YAMADA , Hisaaki NAKANE
CPC classification number: G02B6/04 , G02B6/4403 , G02B6/4407 , G02B6/441 , G02B6/4432 , G02B6/4434 , G02B6/4482 , G02B6/4494
Abstract: [Object] In an optical fiber cable including a plurality of optical fiber units each formed by tying optical fibers in a bundle, preferable water resistance is to be achieved without increasing an outer diameter of the optical fiber cable.[Solution] An optical fiber cable includes: a plurality of optical fiber units each including a plurality of optical fibers and a bundling member wound around an outer periphery of a bundle of the plurality of optical fibers, the bundling member having a surface to which a water-absorbent granular substance is detachably attached.
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公开(公告)号：US20240329345A1
公开(公告)日：2024-10-03
申请号：US18579737
申请日：2022-08-24
Inventor： Yutaka HASHIMOTO , Fumiaki SATO , Masashi KIKUCHI , Soichi ISHIKAWA , Akira SAKURAI , Yusuke YAMADA , Sadaharu HOMAN
CPC classification number: G02B6/4403 , G02B6/02019 , G02B6/02395
Abstract: A core portion of each of optical fibers of an optical fiber cable is made of pure silica glass, an effective cross-sectional area of the core portion at a wavelength of 1550 nm is 110 μm2 or more and 150 μm2 or less. The optical fibers include an intermittent connection portion in which a connection portion to which an adhesive resin is applied and a non-connection portion to which the adhesive resin is not applied are alternately provided between adjacent optical fibers. The optical fiber ribbon has a ratio of a total adhesion length to which the adhesive resin is applied to a total length between all the optical fibers of 40% or more per a unit length of the optical fiber ribbon, and an occupancy ratio of the optical fiber ribbon to a cross-sectional area of the internal space is 30% or more and 40% or less.
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公开(公告)号：US20230076354A1
公开(公告)日：2023-03-09
申请号：US17798112
申请日：2020-02-28
Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Akira SAKURAI , Hiroaki TANIOKA , Hisashi IZUMITA , Yusuke YAMADA , Yuta MARUO
Abstract: To surely fix an optical fiber cable including a nonmetallic tension member in a closure without damaging the tension member and a core. An optical fiber cable holding device according to the present disclosure includes: a thin plate portion configured, by bending a rectangular thin plate in a length direction thereof into a shape of a rough circle, to hold an outer periphery of an optical fiber cable; a binding mechanism portion fixed on one end of the thin plate portion and configured to bind and fix the thin plate portion wound around the optical fiber cable; protrusion fitting holes provided on the other end of the thin plate portion wound around the optical fiber cable; and a band-diameter adjuster fixed to the binding mechanism portion, including a protrusion to fittable into each of the protrusion fitting holes, and configured to adjust a diameter of the rough circle by changing from one hole to another hole of the protrusion fitting holes to be fitted onto the protrusion.
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