Patents Assigned to Fujikura Ltd.
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Patent number: 11764468Abstract: A phased array antenna includes an antenna array substrate having a plurality of antenna elements. At least two beamformers are coupled to the plurality of antenna elements. At least two filters support different frequency bands and are respectively coupled to the at least two beamformers. A frequency converter is coupled to the at least two filters, the frequency converter including one intermediate frequency (IF) port and at least two radio frequency (RF) ports. The one IF port of the frequency converter is configured to support the at least two beamformers via the at least two RF ports. A first beamformer of the at least two beamformers is coupled to a first filter of the at least two filters to form a first beam in a direction different than a second beamformer of the first two beamformers coupled to a second filter of the at least two filters.Type: GrantFiled: September 7, 2021Date of Patent: September 19, 2023Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, FUJIKURA LTDInventors: Alberto Valdes Garcia, Arun Paidimarri, Bodhisatwa Sadhu, Jean-Olivier Plouchart, Xiaoxiong Gu, Christian Wilhelmus Baks, Yo Yamaguchi, Kiyoshi Kobayashi, Yoshiharu Fujisaku, Ning Guan
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Publication number: 20230289946Abstract: A management device that manages a unit including a drum and a long object wound around the drum, the management device includes: a receiver that receives, from a user terminal, a captured image obtained by capturing an image of the unit; and a controller that accesses correspondence data obtained by associating each of image capture results, obtained by successively capturing images of the unit while winding the long object around the drum, with a corresponding winding amount of the long object wound around the drum at a time when the each of the image capture results was obtained. The controller determines a remaining amount of the long object based on the captured image and the correspondence data.Type: ApplicationFiled: July 7, 2021Publication date: September 14, 2023Applicant: FUJIKURA LTD.Inventors: Naoki Okada, Ken Osato
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Patent number: 11756709Abstract: An oxide superconducting wire includes a superconductor laminate including an oxide superconducting layer on at least one surface of a base material, and a plating layer which is included in a stabilizing layer of the superconductor laminate and formed by plating. A surface roughness Ra of the plating layer is 1.0 ?m or more and 2.0 ?m or less. An entire average crystal grain size of the plating layer is 0.86 ?m or more and 3.05 ?m or less.Type: GrantFiled: October 6, 2020Date of Patent: September 12, 2023Assignee: Fujikura Ltd.Inventor: Naonori Nakamura
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Patent number: 11756708Abstract: An oxide superconducting wire includes a superconducting laminate including an oxide superconducting layer disposed, either directly or indirectly, on a substrate, and a stabilization layer which is a Cu plating layer covering an outer periphery of the superconducting laminate, and a Vickers hardness of the Cu plating layer is in the range of 80 to 190 HV.Type: GrantFiled: March 16, 2020Date of Patent: September 12, 2023Assignee: Fujikura Ltd.Inventor: Masaki Ohsugi
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Publication number: 20230282952Abstract: This invention can reduce the size of a filter device as compared to a conventional filter device having the same coupling degree. A filter device (1) includes: a substrate (11); strip-shaped conductors (12a1 to 12a5); and a ground conductor layer (13), an area facing an area interposed between adjacent ones of the strip-shaped conductors (between 12a1 and 12a2 and between 12a2 and 12a3) having a first recessed portion (recessed portions 11a1 and 11a2) having a surface covered with the ground conductor layer (13).Type: ApplicationFiled: March 22, 2021Publication date: September 7, 2023Applicant: FUJIKURA LTD.Inventor: Yusuke Uemichi
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Publication number: 20230282976Abstract: A phased array antenna (1) includes: a plurality of antenna elements (11a to 11d); a plurality of signal paths (R11 and R12) that are connected to each of the antenna elements; a storage unit (M) configured to store a set values of at least one of amplitudes or phases of a signal passed through at least one predefined reference path among the plurality of signal paths with regard to at least one of the antenna elements, and an amplitude and phase control unit (22 or 26) configured to control at least one of the amplitude or the phase of the signal passed through the reference path connected to the antenna element by using the set value stored in the storage unit, and configured to control amplitude or phase of signal passed through the signal path other than the reference path.Type: ApplicationFiled: February 8, 2021Publication date: September 7, 2023Applicants: Fujikura Ltd., International Business Machines CorporationInventors: Kiyoshi Kobayashi, Ken Sakuma, Mark Yeck, Bodhisatwa Sadhu, Paidimarri Arun
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Publication number: 20230273377Abstract: A ferrule for an optical connector includes: a body portion including a fiber hole through which a first optical fiber is inserted, a connection end face at which the fiber hole opens, and a substance, within the body portion, that generates a magnetic force. The body portion is configured to optically connect the first optical fiber to a second optical fiber by the magnetic force.Type: ApplicationFiled: April 20, 2021Publication date: August 31, 2023Applicant: Fujikura Ltd.Inventor: Takaaki Nakane
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Publication number: 20230273378Abstract: A ferrule for an optical connector includes: a ferrule main body including: a connection end surface; an upper surface; a lower surface opposite to the upper surface in a vertical direction, and fiber holes into which optical fibers are inserted along a front-rear direction perpendicular to the vertical direction, and that are arranged in a left-right direction perpendicular to the vertical direction and the front-rear direction. The connection end surface is disposed on a front side in the front-rear direction. Inner diameters of rear end openings of the fiber holes are in a range of 204.6 to 230.0 µm, wherein the rear end openings are disposed on a rear side opposite to the front side in the front-rear direction. A wall surface covers an entirety of the upper surface and the lower surface.Type: ApplicationFiled: July 16, 2021Publication date: August 31, 2023Applicant: Fujikura Ltd.Inventors: Yasuyuki Wada, Ken Kusakata
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Publication number: 20230273375Abstract: A ferrule for an optical connector includes: a ferrule main body that includes fiber holes that extend in a front-rear direction, that are disposed in a left-right direction, and into which optical fibers are inserted, a guide hole into which a guide pin is inserted, and a recessed portion recessed from a rear end surface of the ferrule main body toward a front side on which a connection end surface of the ferrule main body is disposed in the front-rear direction. A vertical direction is perpendicular to both the front-rear direction and the left-right direction. Rear end portions of the fiber holes open at a bottom surface of the recessed portion. The bottom surface includes a first inclined surface inclined toward the fiber holes in a direction toward the front side.Type: ApplicationFiled: July 14, 2021Publication date: August 31, 2023Applicant: Fujikura Ltd.Inventor: Ken Kusakata
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Publication number: 20230273376Abstract: An optical connection component includes: an input end that separates each of light beams output from an output end surface of a multi-core fiber toward single-core fibers, and enlarges each beam diameter of the light beams; and an output end that allows the light beams from the input end to be parallel to an axial direction of the multi-core fiber. The optical connection component guides the light beams output from the output end surface, inclined with respect to a plane perpendicular to the axial direction, to the single-core fibers, wherein the light beams output from the output end surface propagate in a direction inclined with respect to the axial direction.Type: ApplicationFiled: August 6, 2021Publication date: August 31, 2023Applicant: Fujikura Ltd.Inventor: Yoshifumi Koike
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Publication number: 20230273381Abstract: An optical fiber cable includes: a sheath; and a core including twisted optical fibers disposed in an accommodation space in the sheath. Each of the twisted optical fibers includes: a glass portion, a primary layer that covers the glass portion, and a secondary layer that covers the primary layer. A fiber pulling force when pulling out the twisted optical fibers is equal to or greater 15 N/10 m. A value of an index Q is less than 20.Type: ApplicationFiled: August 25, 2021Publication date: August 31, 2023Applicants: Fujikura Ltd., NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Soichiro Kaneko, Masatoshi Ohno, Akira Namazue, Ken Osato, Yusuke Yamada, Yuta Maruo, Akira Sakurai, Shigekatsu Tetsutani, Hiroaki Tanioka
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Publication number: 20230273374Abstract: A cleaning tool includes: a tool main body; an insertion part that moves in a predetermined direction relative to the tool main body, and is configured to hold a head unit movable backward and configured to press a cleaning body against a cleaning target; a retrieve mechanism that retrieves the cleaning body using a relative movement in the predetermined direction between the tool main body and the insertion part; and a rotation mechanism that rotates the head unit after the retrieve mechanism retrieves the cleaning body using the relative movement in the predetermined direction between the tool main body and the insertion part.Type: ApplicationFiled: March 22, 2021Publication date: August 31, 2023Applicant: FUJIKURA LTD.Inventor: Shunsuke Fujita
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Publication number: 20230268715Abstract: A control device for controlling two or more laser diode (LD) modules each supplying pumping light to a variable-output fiber laser, includes: a controller that sets, in accordance with a set value of laser output power of the variable-output fiber laser, a number of LD modules to which a driving current is supplied among the two or more LD modules.Type: ApplicationFiled: December 28, 2022Publication date: August 24, 2023Applicant: FUJIKURA LTD.Inventor: Tatsuya Yamamoto
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Publication number: 20230266556Abstract: An optical fiber unit according to the present disclosure includes a plurality of intermittently-connected optical fiber ribbons. At least one of the optical fiber ribbons includes a plurality of optical fibers including a first optical fiber, and a second optical fiber that is longer than the first optical fiber. Conditions (AA) and c<0.05 are satisfied, where b is an interval, in a length direction, between connection parts that connect the first optical fiber and the second optical fiber, c (%) is a fiber length difference of the second optical fiber with respect to the first optical fiber, and Y is an interval between the optical fibers in a ribbon width direction.Type: ApplicationFiled: June 22, 2021Publication date: August 24, 2023Applicant: Fujikura Ltd.Inventors: Noriaki Yamashita, Akira Namazue, Ken Osato
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Publication number: 20230268707Abstract: A fiber laser apparatus includes: amplification optical fibers including first and second amplification optical fibers, each of which having different amplification characteristics and including a core to which an active element is doped; one or more cooling plates having a first cooling surface that thermally contacts and cools the first amplification optical fiber and a second cooling surface that thermally contacts and cools the second amplification optical fiber; one or more module boxes including a gain module box that houses the amplification optical fibers and the one or more cooling plates; and an enclosure housing the one or module boxes. The first and second cooling surfaces are disposed at different heights in the gain module box. At least a portion of the first cooling surface overlaps at least a portion of the second cooling surface as viewed along a height direction.Type: ApplicationFiled: February 6, 2023Publication date: August 24, 2023Applicant: FUJIKURA LTD.Inventor: Mitsuaki Masubuchi
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Publication number: 20230266520Abstract: A fiber connected body includes: a first multi-core fiber including a first cladding, first cores disposed in the first cladding, and a first marker disposed in the first cladding; and a second multi-core fiber including a second cladding, second cores disposed in the second cladding, and a second marker disposed in the second cladding. One end surface of the second multi-core fiber is connected to one end surface of the first multi-core fiber. Each of the second cores is connected to any one of the first cores, or each of the first cores is connected to any one of the second cores.Type: ApplicationFiled: December 6, 2021Publication date: August 24, 2023Applicant: FUJIKURA LTD.Inventors: Takuya Oda, Osamu Kikuchi
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Publication number: 20230251450Abstract: An optical cable includes optical fiber units each of which includes intermittently-coupled optical fiber ribbons. In at least one of the optical fiber units, in a cross section perpendicular to a longitudinal direction of the at least one of the optical fiber units, a length of a vector GU is shorter than a largest length of vectors MG of the intermittently-coupled optical fiber ribbons forming the at least one of the optical fiber units, where, in each of the intermittently-coupled optical fiber ribbons, each of the vectors MG is a vector starting from M and ending at G, M is a midpoint between optical fibers at both ends of the each of the intermittently-coupled optical fiber ribbons, and G is a center of gravity of the each of the intermittently-coupled optical fiber ribbons, and the vector GU is a resultant vector of the vectors MG.Type: ApplicationFiled: June 15, 2021Publication date: August 10, 2023Applicant: FUJIKURA LTD.Inventors: Hironori Sato, Akira Namazue, Ken Osato
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Patent number: 11719884Abstract: An optical fiber alignment tool includes a fiber aligner that includes: separators that assort optical fibers; and fiber insertion portions each disposed between a respective pair of the separators and that align the optical fibers in an alignment direction in a predetermined order when the optical fibers are inserted into the fiber insertion portion; and a fiber holding portion that includes a mount surface on which the optical fibers are mounted. The fiber aligner and the fiber holding portion are relatively movable in the alignment direction of the optical fibers.Type: GrantFiled: January 30, 2020Date of Patent: August 8, 2023Assignee: Fujikura Ltd.Inventors: Thao Thi Thanh Nguyen, Junya Watanabe, Kunihiko Fujiwara
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Publication number: 20230236230Abstract: An evaluation device includes a holder that holds the radio communication module, a measurement antenna that transmits and receives radio waves for measurement, and a temperature regulator that adjusts a temperature of the radio communication module. The temperature regulator is in direct or in indirect contact with the radio communication module so as to be capable of transferring heat.Type: ApplicationFiled: December 27, 2022Publication date: July 27, 2023Applicant: Fujikura Ltd.Inventors: Yuki Suto, Eiji Takenaka, Katsumasa Takahashi, Go Katsura
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Publication number: 20230236366Abstract: An optical connector includes: a ferrule having a fiber hole into which an optical fiber is inserted and a guide hole into which a guide pin is inserted; a housing that accommodates the ferrule; and a biasing member disposed in the housing and applies to the ferrule a biasing force directed toward a side close to an opening portion of the housing in an axial direction of the guide hole, the biasing force having nonlinear characteristics.Type: ApplicationFiled: April 21, 2021Publication date: July 27, 2023Applicant: Fujikura Ltd.Inventor: Masayuki Hirose
