公开(公告)号：US09645340B2

公开(公告)日：2017-05-09

申请号：US15294094

申请日：2016-10-14

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshinori Yamamoto ,  Masaaki Hirano ,  Masakazu Takami

IPC: G02B6/44 ,  G02B6/036 ,  G02B6/02

CPC classification number: G02B6/4409 ,  G02B6/02019 ,  G02B6/02266 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/4408

Abstract: An optical fiber cable has a sectional area of Ac [mm2] and housing a number N of optical fibers. A transmission loss αdB [dB/km], a mode field diameter W [μm], an effective area Aeff [μm2], an effective length Leff [km], and a wavelength dispersion D [ps/nm/km] of each of the optical fibers at a wavelength of 1550 nm satisfy a predetermined equation and the transmission loss of the optical fiber at the wavelength of 1550 nm is 0.19 dB/km or less, and the effective area of the optical fiber is in a range from 125 to 155 μm2.

公开(公告)号：US11378766B2

公开(公告)日：2022-07-05

申请号：US17290315

申请日：2019-11-06

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Fumiaki Sato ,  Kuushin Ryan ,  Taro Fujita ,  Nayu Yanagawa ,  Ryota Fukumoto ,  Masakazu Takami ,  Yohei Suzuki

IPC: G02B6/44

Abstract: An optical fiber cable includes a plurality of intermittently connected optical fiber ribbons inside a cable sheath, in which a fibrous filler or an FRP using the fibrous filler is provided on at least one pair of diagonals of the two diagonal directions approximately orthogonal to each other inside the cable sheath. An average linear expansion coefficient of the fibrous filler at −40° C. to +70° C. is smaller than an average linear expansion coefficient of the cable sheath at −40° C. to +70° C.

公开(公告)号：US11886026B2

公开(公告)日：2024-01-30

申请号：US17639755

申请日：2020-09-04

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Fumiaki Sato ,  Kenta Tsuchiya ,  Masakazu Takami ,  Tsuguo Amano

IPC: G02B6/44

CPC classification number: G02B6/4403

Abstract: An optical fiber ribbon that includes 16-48 parallel optical fiber core wires and a connecting resin that connects adjacent optical fiber core wires. The outer diameter D of the optical fiber core wires is 160-220 μm, and when N is the number of optical fiber core wires and S is the bending strain of the optical fiber core wires, S=0.167×N/2(%) or less.

公开(公告)号：US09696508B2

公开(公告)日：2017-07-04

申请号：US15084784

申请日：2016-03-30

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshinori Yamamoto ,  Masaaki Hirano ,  Masakazu Takami

IPC: G02B6/44 ,  G02B6/036 ,  G02B6/02

CPC classification number: G02B6/4409 ,  G02B6/02019 ,  G02B6/02266 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03655 ,  G02B6/4408

Abstract: An optical fiber cable has a sectional area of Ac [μm2] and housing a number N of optical fibers. A transmission loss αdB [dB/km], a mode field diameter W [μm], an effective area Aeff [μm2], an effective length Leff [km], and a wavelength dispersion D [ps/nm/km] of each of the optical fibers at a wavelength of 1550 nm satisfy a predetermined equation.

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：US09535224B2

公开(公告)日：2017-01-03

申请号：US15084784

申请日：2016-03-30

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Yoshinori Yamamoto ,  Masaaki Hirano ,  Masakazu Takami

IPC: G02B6/44 ,  G02B6/036 ,  G02B6/02

Abstract: An optical fiber cable has a sectional area of Ac [μm2] and housing a number N of optical fibers. A transmission loss αdB [dB/km], a mode field diameter W [μm], an effective area Aeff [μm2], an effective length Leff [km], and a wavelength dispersion D [ps/nm/km] of each of the optical fibers at a wavelength of 1550 nm satisfy a predetermined equation.

公开(公告)号：US12117662B2

公开(公告)日：2024-10-15

申请号：US17440594

申请日：2020-03-19

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Fumiaki Sato ,  Kenta Tsuchiya ,  Tsuguo Amano ,  Masakazu Takami

IPC: G02B6/44 ,  G02B6/38

CPC classification number: G02B6/4404 ,  G02B6/3885 ,  G02B6/441

Abstract: This intermittent connection-type optical fiber tape core is configured in a manner such that in a state where a plurality of optical fiber cores are arranged in parallel in a direction perpendicular to the lengthwise direction of said plurality of optical fiber cores, some or all of the intervals between the plurality of optical fiber cores are intermittently provided in the lengthwise direction with connected sections where the intervals between adjacent optical fiber cores are connected and non-connected sections where the intervals between adjacent optical fiber cores are not connected. The outer diameter of each of the plurality of optical fiber cores is 160-220 μm, inclusive. The catenary amount of the tip end of the intermittent connection-type optical fiber tape core projecting from the held location is 0.1-2 mm, inclusive, in a given state.

公开(公告)号：US11762161B2

公开(公告)日：2023-09-19

申请号：US17620259

申请日：2020-06-17

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Fumiaki Sato ,  Masakazu Takami ,  Tsuguo Amano ,  Yohei Suzuki ,  Yutaka Hashimoto ,  Yoshiaki Nagao ,  Naomichi Osada

IPC: G02B6/44

CPC classification number: G02B6/4432 ,  G02B6/4403

Abstract: An optical fiber cable includes: a plurality of optical fibers or a plurality of optical fiber ribbons; a cable sheath inside which a plurality of the optical fibers or a plurality of the optical fiber ribbons are housed; and four or more tensile strength member units which are provided so as to be embedded inside the cable sheath, and in which two or more tensile strength members are paired with each other, in which the four or more tensile strength member units are respectively provided at locations facing each other with a center of the optical fiber cable interposed therebetween in a cross section in a radial direction of the optical fiber cable, and in which a cable outer diameter of the optical fiber cable is 6 mm or more and 16 mm or less.

公开(公告)号：US11535752B2

公开(公告)日：2022-12-27

申请号：US16648409

申请日：2018-09-21

Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor： Taro Fujita ,  Shinya Nishikawa ,  Nayu Yanagawa ,  Yoshiaki Nagao ,  Masakazu Takami ,  Kenta Tsuchiya

IPC: C08L85/02 ,  C08K3/014 ,  C08K3/22 ,  C08K5/17 ,  C08K5/3492 ,  C08L23/06 ,  C08L23/08 ,  C08L23/20 ,  C08L83/04 ,  H01B7/295

Abstract: A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.