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1.发明授权公开(公告)号：US12249832B2
公开(公告)日：2025-03-11
申请号：US18157332
申请日：2023-01-20
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Masahiro Rikiso , Asuka Abe
Abstract: A power converter includes: an input unit configured to be electrically connected to a device; a voltage charge unit configured to change voltage; a voltage adjustment unit configured to adjust the voltage supplied to a transmission line; a target setting unit configured to set a first target value of the voltage change unit; a voltage monitoring unit configured to observe the voltage of the transmission line; and a threshold determination mechanism configured to calculate a second target value of the voltage adjustment unit in accordance with voltage of the transmission line. The target setting unit of the power converter is configured to generate the first target value as an output target of the voltage charge unit in accordance with the voltage observed by the voltage monitoring unit. The first target value has characteristics to change a threshold voltage for controlling output of the voltage adjustment unit depending on time.
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公开(公告)号：US12248171B2
公开(公告)日：2025-03-11
申请号：US17931732
申请日：2022-09-13
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Shigehiro Takasaka , Koichi Maeda , Ryuichi Sugizaki
Abstract: A multi-core optical amplifying fiber includes: core portions doped with a rare-earth element; an inner cladding portion; and an outer cladding portion. A mode field diameter of each core portion at a wavelength at which the rare-earth element performs optical amplification is 5 μm to 11 μm, a relative refractive-index difference of the maximum refractive index of each core portion with respect to the inner cladding portion is 0.35% to 2%, a core-to-core distance is set such that total inter-core crosstalk is −40 dB/100 m or lower in an optical amplification wavelength band subjected to the optical amplification, a cladding thickness is smaller than a value obtained by adding the mode field diameter to a minimum value of the core-to-core distance, and a ratio of a total sectional area of the core portions to a sectional area of the inner cladding portion is 1.9% or more.
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公开(公告)号：US12211642B2
公开(公告)日：2025-01-28
申请号：US17777563
申请日：2020-11-18
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Yonghoon Kim , Hideki Ii , Takumi Sato , Daisuke Asami , Masahiro Sugimoto , Hirokazu Tsubouchi
Abstract: The superconducting coil includes: a winding frame; and at least two superconducting rectangular wire layers provided in such a manner that a superconducting rectangular wire is spirally wound on an outer surface of the frame such that wires adjacent to each other in an axial direction of the frame are arranged side by side and separated, the wire including an NbTi-based or Nb3Sn-based wire having a surface coated with copper or copper alloy, in which at least a thermoplastic fusible resin is provided in a separated section between the adjacent wires, and when viewed in a cross section including an axis of the frame, at least one of voids that are partitionable on outer surfaces of a total of three wires and a total of four wires located on the two adjacent layers and adjacent to each other are 4% or less in terms of a void ratio (V1).
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公开(公告)号：US12205616B2
公开(公告)日：2025-01-21
申请号：US18547621
申请日：2022-02-14
Applicant: UACJ CORPORATION , FURUKAWA ELECTRIC CO., LTD.
Inventor： Kotaro Kitawaki , Ryohei Yamada , Shinpei Todo , Hideyuki Hatakeyama
IPC: G11B17/038 , G11B5/82 , G11B17/028 , G11B19/20 , G11B25/04
Abstract: A magnetic disk device includes a plurality of disk-shaped magnetic disks, a spacer, a hub, and a clamp. Each of the magnetic disks includes a through-hole in a center section thereof. The spacer is disposed among the magnetic disks, and includes a through-hole in a center section thereof. The hub is inserted into the through-holes of the magnetic disks and the spacers. The clamp presses and holds the magnetic disks and the spacer. At surfaces where the magnetic disks and the spacer or the clamp contact, a flat surface height of an upper surface of at least one magnetic disk that contacts an outer circumference of the spacer or the clamp is lower than a flat surface height of the upper surface of at least one magnetic disk of the magnetic disks that contacts an inner circumference of the spacer or the clamp.
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公开(公告)号：US20250023316A1
公开(公告)日：2025-01-16
申请号：US18898807
申请日：2024-09-27
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Haruki OGOSHI , Junji YOSHIDA , Yusuke INABA , Seiji ICHINO , Yasuto TATAMIDA , Shigehiro TAKASAKA , Ryuichi SUGIZAKI , Nitidet THUDSALINGKARNSAKUL , Sanguan ANANTATHANASARN , Supadda PHOKEAW
IPC: H01S3/067 , H01S3/0915 , H01S3/30
Abstract: A Raman amplifier includes: a Raman amplification optical fiber configured to Raman amplify incoherent light in which relative intensity noise (RIN) is suppressed while transmitting the incoherent light; and a pumping light source configured to supply pumping light to the Raman amplification optical fiber. A corner frequency fc [Hz] at which the suppression of the RIN starts in the Raman-amplified incoherent light is estimated by using the following Equation (1): fc = 1 / ( D · Δλ · L ) ( 1 ) in which a full width at half maximum of a wavelength spectrum of the incoherent light is Δλ [nm], a length of the Raman amplification optical fiber is L [km], and a chromatic dispersion of the Raman amplification optical fiber at a center wavelength of the incoherent light is D [ps/nm/km].
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Patent Agency Ranking
公开(公告)号：US20250015564A1
公开(公告)日：2025-01-09
申请号：US18895499
申请日：2024-09-25
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Masaya NAKAZUMI
IPC: H01S5/40 , H01S5/02253
Abstract: A light emission device includes: a condenser lens having an optical axis extending in a first direction, the condenser lens being configured to collect light in a second direction orthogonal to the first direction, wherein an array of a plurality of light beams traveling in the first direction and arranged at intervals in the second direction is input to the condenser lens; and a light emission unit group including a plurality of light emission units configured to output the beams included in the array, each of the light emission units being configured to output each of the beams in a single mode in the second direction and in a multi-mode in a third direction orthogonal to the first direction and the second direction.
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公开(公告)号：US12179183B2
公开(公告)日：2024-12-31
申请号：US17299718
申请日：2019-12-03
Inventor： Mai Nishii , Yuichiro Banba , Kaori Sekine , Yukako Nakai , Masayuki Fukushima , Sadahiro Kato , Takao Masuda , Yuta Nakasaka , Takuya Yoshikawa
Abstract: A functional structure which can resist a decrease in the functions of the functional material caused by influences such as force and heat and thus have a long life. The functional structure includes supports each having a porous structure and including a zeolite-type compound, and at least one functional material present in the supports, in which each of the supports has channels communicating with one another, the functional material is present at least in the channel of each of the supports, the functional material present in the supports includes a metal element (M), and the content of the metal element (M) is more than 2.5 mass % with respect to the functional structure.
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公开(公告)号：US12176314B2
公开(公告)日：2024-12-24
申请号：US17529388
申请日：2021-11-18
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Minoru Morita
IPC: H01L23/00 , C09J163/00 , H01L25/065
Abstract: A dicing die attach film, including an adhesive layer and a temporary-adhesive layer, the adhesive layer and the temporary-adhesive layer being laminated, wherein the adhesive layer is a film-like adhesive layer containing an epoxy resin (A), an epoxy resin curing agent (B), a phenoxy resin (C), and an inorganic filler (D); an elastic modulus of the phenoxy resin (C) at 25° C. is 500 MPa or more; in the adhesive layer, a proportion of the phenoxy resin (C) in total content of the epoxy resin (A) and the phenoxy resin (C) is 10 to 60% by mass; a peeling strength between the adhesive layer and the temporary-adhesive layer at a range of 25 to 80° C. is 0.40 N/25 mm or less; and a thermal conductivity of the adhesive layer after thermal curing is 1.0 W/m·K or more.
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公开(公告)号：US12174412B2
公开(公告)日：2024-12-24
申请号：US17894292
申请日：2022-08-24
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kazunori Mukasa
Abstract: A multi-core fiber includes: a plurality of core portions each including a central core portion, an intermediate layer formed on an outer periphery of the central core portion, and a trench layer formed on an outer periphery of the intermediate layer; and a cladding portion formed on an outer periphery of the plurality of core portions, wherein in each of the plurality of core portions, Δ1>Δ2>Δ3 and 0%>Δ3>−0.3% are satisfied, where Δ1 is an average maximum relative refractive-index difference of the central core portion, Δ2 is an average relative refractive-index difference of the intermediate layer, and Δ3 is an average relative refractive-index difference of the trench layer, with respect to the cladding portion.
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公开(公告)号：US12170158B2
公开(公告)日：2024-12-17
申请号：US17983830
申请日：2022-11-09
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Toyomitsu Asakura , Eiji Konda , Yoshimitsu Kuroki
Abstract: A metallic cable includes, in order from an inner side thereof, a plurality of coated conduction wires, a press winding tape, a laminated tape, and an outer jacket. The outer jacket is provided on an outer circumference of the laminated tape and such that it covers the outer circumference of the laminated tape. The outer jacket is made of polyethylene having a density greater than or equal to that of medium-density polyethylene (MDPE) (≥930 kg/m3), and more preferably made of high-density polyethylene (≥942 kg/m3). If polyethylene having a density that is equal to or greater than that of MDPE is used to form the outer jacket, the temperature that is appropriate for extruding MDPE approaches a bonding temperature range of the resin layer of the laminated tape. The resin layer and the metal layer can be bonded and joined together at an overlapped part, tightly enclosing a cable core.
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