公开(公告)号：US20240343642A1

公开(公告)日：2024-10-17

申请号：US18755868

申请日：2024-06-27

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Katsushi HAMAKUBO ,  Noriaki IWAGUCHI ,  Miho IKEGAWA

IPC: C03C25/475 ,  C03C25/1065 ,  C03C25/47 ,  C08K3/22 ,  C09D4/00 ,  C09D7/61 ,  C09D135/02 ,  G02B6/02 ,  G02B6/44

CPC classification number: C03C25/475 ,  C03C25/1065 ,  C03C25/47 ,  C09D4/00 ,  C09D7/61 ,  C09D135/02 ,  G02B6/02395 ,  G02B6/4403 ,  C08K2003/2241

Abstract: A resin composition for colored coating on an optical fiber contains a photopolymerizable compound, and a photopolymerization initiator, in which the photopolymerization initiator contains an acyl phosphine oxide compound that is in a liquid state at 25° C.

公开(公告)号：US20240168248A1

公开(公告)日：2024-05-23

申请号：US18547363

申请日：2022-03-31

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Fumiaki SATO ,  Satoshi OHNUKI ,  Kenichiro OTSUKA

IPC: G02B6/44

CPC classification number: G02B6/4403

Abstract: An optical fiber cable includes a cable main body including 3000 or more optical fibers, a sheath material receiving therein the optical fibers, and a multi-fiber connector connected to ends of the optical fibers, in which the sheath material includes 0.2% or more by mass and 1.5% or less by mass of silicone.

公开(公告)号：US11971592B2

公开(公告)日：2024-04-30

申请号：US17139720

申请日：2020-12-31

Applicant: Sterlite Technologies Limited

Inventor： Badri Gomatam ,  Manish Sinha

IPC: G02B6/44 ,  F21V8/00 ,  G02B6/36

CPC classification number: G02B6/4403 ,  G02B6/0076 ,  G02B6/3676 ,  G02B6/4411

Abstract: The present disclosure provides a method for stacking a plurality of optical fibre ribbons in an optical fibre cable. The method includes a step of arranging a plurality of optical fibre ribbon stacks in a hexagonal arrangement in the optical fibre cable. The method may further include stacking the plurality of optical fibre ribbons to form an optical fibre ribbon stack such that the optical fibre ribbon stack may have a parallelogram shape. Each optical fibre ribbon is placed at an offset from adjacent optical fibre ribbon. The optical fibre ribbon stack may have a stack height. In addition, each optical fibre ribbon of the plurality of optical fibre ribbons may have a ribbon height. The hexagonal arrangement may have the packaging density greater than 80%.

公开(公告)号：US20240101474A1

公开(公告)日：2024-03-28

申请号：US18270334

申请日：2021-12-21

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yuya HOMMA

IPC: C03C25/105 ,  C03C25/1065 ,  C03C25/326 ,  G02B6/02 ,  G02B6/44

CPC classification number: C03C25/105 ,  C03C25/1065 ,  C03C25/326 ,  G02B6/02395 ,  G02B6/4403 ,  G02B6/4486 ,  C03C2217/445 ,  C03C2218/32

Abstract: A resin composition for primary coating of an optical fiber contains a photopolymerizable compound containing a urethane (meth)acrylate containing a reaction product of a polypropylene polyol having a number average molecular weight of 8000 or more and 20000 or less and an isocyanate group-containing (meth)acrylate and a photopolymerization initiator.

公开(公告)号：US11927803B2

公开(公告)日：2024-03-12

申请号：US17634138

申请日：2020-07-13

Applicant: FUJIKURA LTD.

Inventor： Soichiro Kaneko ,  Koji Tomikawa ,  Ken Osato ,  Noriaki Yamashita

IPC: G02B6/245 ,  G02B6/25 ,  G02B6/255 ,  G02B6/44 ,  G02B6/46

CPC classification number: G02B6/2555 ,  G02B6/245 ,  G02B6/25 ,  G02B6/2551 ,  G02B6/44 ,  G02B6/4403 ,  G02B6/46 ,  G02B6/255

Abstract: An optical fiber arrangement method includes: preparing an intermittently connected optical fiber ribbon including optical fibers arranged side by side at a first pitch larger than a fiber diameter; holding a non-connecting region of the optical fiber ribbon with a holder, where connecting portions intermittently connect the optical fibers extending out from the holder to each other; changing a width of the optical fiber ribbon in an interior of the holder; and arranging the optical fibers, extending out from the holder, with intervals of the optical fibers changed from the first pitch to a second pitch smaller than the first pitch by removing the connecting portions in a state where the holder is holding the optical fibers.

公开(公告)号：US11914205B2

公开(公告)日：2024-02-27

申请号：US17821537

申请日：2022-08-23

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Minoru Kasahara ,  Yoshihiro Arashitani ,  Kouji Mochiduki ,  Masahiro Yabe

IPC: G02B6/44 ,  G02B6/02

CPC classification number: G02B6/4403 ,  G02B6/02009 ,  G02B6/02395

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

公开(公告)号：US11892700B2

公开(公告)日：2024-02-06

申请号：US17641896

申请日：2020-09-11

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Akihisa Watanabe ,  Masakazu Takami ,  Fumiaki Sato

IPC: G02B6/44

CPC classification number: G02B6/4482 ,  G02B6/441 ,  G02B6/4403 ,  G02B6/448

Abstract: An optical fiber unit includes: an optical fiber ribbon in which a plurality of optical fibers are arranged in parallel and connected to each other; a colored bundle tape longitudinally wrapped around an optical fiber ribbon bundle in which a plurality of the optical fiber ribbons are stranded together; and a colored bundle yarn spirally wound around the optical fiber ribbon bundle and the bundle tape.

公开(公告)号：US20230417997A1

公开(公告)日：2023-12-28

申请号：US18343008

申请日：2023-06-28

Applicant: COMMSCOPE TECHNOLOGIES LLC

Inventor： Laurens Izaäk VAN WUIJCKHUIJSE ,  Pieter STIENSTRA ,  Adrianus Wilhelmus VAN UDEN ,  Johan GEENS

IPC: G02B6/36 ,  G02B6/255 ,  G02B6/38 ,  G02B6/42 ,  G02B6/44

CPC classification number: G02B6/3608 ,  G02B6/255 ,  G02B6/3801 ,  G02B6/3825 ,  G02B6/3846 ,  G02B6/3869 ,  G02B6/4281 ,  G02B6/4403 ,  G02B6/3612 ,  G02B6/3885 ,  G02B6/3887

Abstract: Flexible optical circuits and methods of providing the same in which routing of optical fibers on a flexible substrate is performed after optical fiber ends have been processed. In some embodiments, the methods include fiber splicing operations that can be performed on the pre-processed optical fibers before or after the fibers have been routed on the flexible substrate.

公开(公告)号：US11828996B2

公开(公告)日：2023-11-28

申请号：US17905269

申请日：2021-01-18

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Noriaki Iwaguchi ,  Takashi Fujii ,  Fumiaki Sato

IPC: G02B6/44 ,  C03C25/475 ,  C03C25/105 ,  C03C25/32 ,  G02B6/02

CPC classification number: G02B6/4403 ,  C03C25/105 ,  C03C25/32 ,  C03C25/475 ,  G02B6/02395 ,  G02B6/4482 ,  C03C2217/445 ,  C03C2217/485

Abstract: An optical fiber ribbon comprises a plurality of optical fibers arranged in parallel and a connecting resin layer containing a ribbon resin for coating and connecting the plurality of optical fibers, wherein each of the plurality of optical fibers has an outer diameter of 220 μm or less; each of the plurality of optical fibers includes a glass fiber, a primary resin layer, and a colored secondary resin layer; the colored secondary resin layer contains a cured product of a resin composition containing 2,4,6-trimethylbenzoyldiphenylphosphine oxide; and a content of phosphorus in the colored secondary resin layer is 0.03 mass % or more and 0.30 mass % or less, and an amount of a phosphorus-tin complex at the surface of the colored secondary resin layer is 300 ppm or more and 7000 ppm or less.

公开(公告)号：US20230367088A1

公开(公告)日：2023-11-16

申请号：US18245587

申请日：2021-09-13

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Toshihisa SATO ,  Takashi FUJII

IPC: G02B6/44

CPC classification number: G02B6/4403

Abstract: An intermittently coupled-type optical fiber ribbon includes a plurality of optical fibers arranged in parallel and intermittently coupling portions formed by coupling parts between the adjacent optical fibers with a resin. In the coupling portions, the resin is provided on one side surface and the other side surface of the optical fiber ribbon. When an average of maximum values of thicknesses TF of the coupling portions on the one side surface is set as TFave and an outer diameter of each optical fiber is set as D, D/4≤TFave≤D/2. When an average of maximum values of thicknesses TB of the coupling portions on the other side surface is set as TBave, TBave