Patents Assigned to Fujikura Ltd.
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Patent number: 11799270Abstract: A semiconductor optical element includes: a first conductivity type semiconductor substrate; and a laminated body disposed on the first conductivity type semiconductor substrate. The laminated body includes, in the following order from a side of the first conductivity type semiconductor substrate: a first conductivity type semiconductor layer; an active layer; a second conductivity type semiconductor layer; and a second conductivity type contact layer. The second conductivity type semiconductor layer includes: a carbon-doped semiconductor layer in which carbon is doped as a dopant in a compound semiconductor; and a group 2 element-doped semiconductor layer in which a group 2 element is doped as a dopant in a compound semiconductor. The carbon-doped semiconductor layer is disposed at a position closer to the active layer than the group 2 element-doped semiconductor layer.Type: GrantFiled: June 1, 2022Date of Patent: October 24, 2023Assignees: Fujikura Ltd., OPTOENEGY Inc.Inventors: Rintaro Morohashi, Ryozaburo Nogawa, Tomoaki Koui, Yumi Yamada
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Publication number: 20230333326Abstract: A cap attachable to an optical connector including a ferrule and a housing that slidably houses the ferrule, includes: a body part configured to attach to the optical connector and configured to cover a connecting end face of the ferrule projecting from the housing and a side surface of the ferrule projecting from the housing; a housing contact part configured to contact the housing inside the body part; and a ferrule contact part configured to contact the side surface of the ferrule in a state where the housing contact part is in contact with the housing.Type: ApplicationFiled: June 7, 2021Publication date: October 19, 2023Applicant: Fujikura Ltd.Inventors: Thao Thi Thanh Nguyen, Shigeo Takahashi
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Publication number: 20230333345Abstract: An accommodation unit includes: a casing that: stores trays each storing an optical fiber, and includes an insertion opening into which the trays are inserted to be arranged in an up-down direction; and support members disposed in the casing, each of the support members slidably supporting a lower part of each of the trays, and each of the support members including: a pair of arm parts disposed apart from each other in a left-right direction orthogonal to a slide direction of the trays and the up-down direction; and a projection that is disposed on each of the arm parts in a vicinity of the insertion opening, and contacts an upper part of each of the trays under each of the support members.Type: ApplicationFiled: August 4, 2021Publication date: October 19, 2023Applicant: Fujikura Ltd.Inventor: Rikimaru Takeda
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Patent number: 11791523Abstract: This invention reduces, in a type of bandpass filter that is called a strip-line filter or a microstrip filter, a variation in filter characteristics that can occur in a case where the design of the first line and the second line is changed. The bandpass filter (filter 10) includes a ground conductor layer, n resonators (141 to 146), and first and second lines (lines 151, 152), wherein the first and second lines (lines 151, 152) are respectively connected to a third side (side R13) of a first resonator (resonator 141) and a seventh side (side R63) of an n-th resonator, a gap (G1) is provided in an area of a fourth side (side R14) which area is close to a second resonator (resonator 142), and a gap (G6) is provided in an area of an eighth side (side R64) which area is close to an n?1-th resonator (resonator 145).Type: GrantFiled: February 19, 2021Date of Patent: October 17, 2023Assignee: FUJIKURA LTD.Inventor: Yuta Hasegawa
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Patent number: 11791522Abstract: Deterioration is reduced in filter characteristics in a type of bandpass filter that is called a strip-line filter or a microstrip filter. A bandpass filter (filter 10) includes a ground conductor layer (12), a plurality of resonators (141 to 146) arranged in a layer spaced from the ground conductor layer (12), a first line (line 151) connected to a first-pole resonator (141) and a second line (line 152) connected to a last-pole resonator (146), wherein a direction in which the first line (line 151) is drawn out from the first-pole resonator (141) and a direction in which the second line (line 152) is drawn out from the last-pole resonator (146) are opposite to each other.Type: GrantFiled: February 19, 2021Date of Patent: October 17, 2023Assignee: FUJIKURA LTD.Inventor: Yuta Hasegawa
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Publication number: 20230324639Abstract: An optical wiring unit includes: a tray that includes a bottom plate; and a lid body that includes a top plate facing the bottom plate in an up-down direction. An accommodating space that accommodates an optical fiber is formed between the bottom plate and the top plate. one of the tray and the lid body includes: an outer wall portion; and an inner wall portion inside the accommodating space with respect to the outer wall portion. The other of the tray and the lid body includes an intermediate wall portion inserted between the outer wall portion and the inner wall portion. The inner wall portion has a dimension in the up-down direction smaller than that of the outer wall portion.Type: ApplicationFiled: May 6, 2021Publication date: October 12, 2023Applicant: Fujikura Ltd.Inventors: Hiroyuki Takamizawa, Toshiaki Nakajima, Hiroyoshi Shibata
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Patent number: 11780761Abstract: A method for producing a porous glass fine particle body includes: a first layer formation step of continuously forming in a longitudinal direction of a rotating starting base material without a break, a first soot layer on a surface of the rotating starting base material; and an second layer formation step of forming second soot layers on an outside of the first soot layer while supplying a raw material gas to each of a burner among burners of a burner group and moving the burner group in a reciprocating manner in the longitudinal direction relative to the rotating starting base material. The burner group and the starting base material move relatively to each other along the longitudinal direction.Type: GrantFiled: April 12, 2019Date of Patent: October 10, 2023Assignee: Fujikura Ltd.Inventor: Nobutoshi Sato
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Patent number: 11782223Abstract: An optical connector includes optical fibers, a ferrule, and a pitch fixing member. The optical fibers have bare parts where coating parts have been stripped off. The ferrule has insertion holes, and the bare parts are inserted into the insertion holes. The pitch fixing member is inserted into the ferrule and has fixing parts that fix a pitch of the coating parts of the optical fibers to a pitch of the insertion holes.Type: GrantFiled: July 10, 2020Date of Patent: October 10, 2023Assignee: Fujikura Ltd.Inventors: Shuhei Kanno, Takahito Otomitsu, Kunihiko Fujiwara
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Patent number: 11782228Abstract: An optical fiber cable includes: a sheath including recesses and protrusions that are alternately disposed in a circumferential direction on an outer circumferential surface of the sheath; a core that includes optical fibers and is accommodated in the sheath; and tensile strength members embedded in the sheath. The core is interposed between the tensile strength members in a transverse cross-sectional view. In the transverse cross-sectional view, the tensile strength members are embedded in portions of the sheath facing outward from the core in a first direction in which the two tensile strength members face each other in the transverse cross-sectional view.Type: GrantFiled: December 4, 2020Date of Patent: October 10, 2023Assignee: Fujikura Ltd.Inventors: Akira Namazue, Shogo Shimizu, Go Taki, Okimi Mukai, Ken Osato
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Publication number: 20230314713Abstract: An optical connector includes: a ferrule that holds an end part of a fiber; and a holding member including: a holding part that slidably holds the ferrule; a fixing part through which the fiber extending from the ferrule is inserted and to which a sleeve for protecting a fusion splice point between the fiber and an optical fiber is fixed; and a housing part that houses the fiber between the holding part and the fixing part when the fiber is bent and the ferrule moves rearward of the housing part.Type: ApplicationFiled: December 11, 2020Publication date: October 5, 2023Applicant: Fujikura Ltd.Inventor: Ririka Seino
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Patent number: 11777253Abstract: A receptacle connector 20 includes a housing 200 in which a recess 203 for housing a plug connector 30 is formed on a side opposite to a surface mounted on a substrate of the housing, a required number of contacts 220 arranged between end portions of the housing 200, and reinforcement metal fittings 230 each of which is provided on one of the end portions of the housing 200. The reinforcement metal fitting 230 has a cantilever resilient piece 235 that extends in the arrangement direction of the contacts 220, and a contact piece 236 that extends from a free end portion of the cantilever resilient piece 235 and comes into contact with the plug connector 30 when the receptacle connector 20 and the plug connector 30 are fitted to each other.Type: GrantFiled: May 24, 2019Date of Patent: October 3, 2023Assignee: FUJIKURA LTD.Inventors: Soichi Sugaya, Kiyotaka Yamada, Yasuyuki Akiyama, Kazunori Takei
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Publication number: 20230305231Abstract: An optical fiber fusion splicer includes: a replaceable groove-formed unit having first positioning grooves, separated from each other by an equal distance, on which first optical fibers are disposed, and second positioning grooves, separated from each other by an equal distance, on which second optical fibers are disposed, wherein the first optical fibers constitute a first mass fiber and have first glass parts, and the second optical fibers constitute a second mass fiber and have second glass parts; a lighting part that illuminates, with light, the first optical fibers and the second optical fibers; a lens that condenses the light passing through the first glass parts and the second glass parts; a camera that captures an image formed by the lens; and a pair of discharge electrodes that heat and melt, by electric discharge, the first glass parts and the second glass parts.Type: ApplicationFiled: August 31, 2021Publication date: September 28, 2023Applicant: Fujikura Ltd.Inventors: Hiroshi Sugawara, Koichi Yokota
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Patent number: 11768344Abstract: An optical cable wiring method, includes: installing a bundle of optical cables from a utility pole as a starting point of a first wiring path to a branch point on the first wiring path; dividing, at the branch point, the bundle of optical cables into a first group and a second group; installing one of the optical cables in the first group along the first wiring path ahead of the branch point; and installing one of the optical cables in the second group along a second wiring path branching from the first wiring path.Type: GrantFiled: July 6, 2020Date of Patent: September 26, 2023Assignee: Fujikura Ltd.Inventors: Go Taki, Akira Namazue, Ken Osato
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Publication number: 20230296456Abstract: A pressure sensitive sensor includes: a first substrate; a resistor disposed on the first substrate; a first wiring pattern disposed on the first substrate and connected to the resistor; first comb tooth patterns disposed on the first substrate and connected to the resistor; a pusher includes a pushing part and a connecting body electrically connected to the first comb tooth patterns by pushing of the pushing part; and a second wiring pattern disposed on the first substrate and electrically connected to the connecting body by pushing of the pushing part. A material of the resistor has an electrical resistivity higher than electrical resistivities of materials of the first wiring pattern, the first comb tooth patterns, the connecting body, and the second wiring pattern. The resistor does not overlap the connecting body in a plan view.Type: ApplicationFiled: October 11, 2021Publication date: September 21, 2023Applicant: Fujikura Ltd.Inventor: Masami Watanabe
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Publication number: 20230296830Abstract: An optical fiber cable connection structure includes: optical fibers divided into a first bundle and a second bundle in a middle portion of an optical fiber cable in a longitudinal direction of the optical fiber cable; a first fixing portion that integrally fixes the optical fibers of the first bundle in the middle portion; a second fixing portion that integrally fixes the optical fibers of the second bundle in the middle portion; and an optical path that is disposed between the first bundle and the second bundle, holds a space between the first bundle and the second bundle in the longitudinal direction, and optically connects the divided optical fibers to each other.Type: ApplicationFiled: August 6, 2021Publication date: September 21, 2023Applicant: Fujikura Ltd.Inventors: Takuya Oda, Akito Nishimura
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Publication number: 20230295411Abstract: A structure having a microstructure or a nanostructure includes multi-block copolymers each having three or more segments including one or more first segments and one or more second segments. Each of the one or more first segments and the one or more second segments is constituted by one or more block polymers. Each of the one or more first segments has one of hydrophobicity and hydrophilicity, and each of the one or more second segments has the other of hydrophobicity and hydrophilicity. The one or more first segments and the one or more second segments are bonded in an alternating manner.Type: ApplicationFiled: December 21, 2021Publication date: September 21, 2023Applicant: Fujikura Ltd.Inventor: Yuichiro Kunai
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Publication number: 20230296852Abstract: An optical connector includes: a ferrule that includes a connection end surface, and a fiber hole into which an optical fiber is configured to be inserted up to the connection end surface; a spring that is disposed on a rear side of the ferrule that is opposite to a front side that is a side on which the connection end surface is disposed in a longitudinal direction of the fiber hole; a spring push that sandwiches the spring with the ferrule and through which the optical fiber is inserted in the longitudinal direction; and a housing that accommodates the ferrule and the spring and that is engaged with the spring push such that the ferrule is biased to the front side by the spring. The optical fiber is configured to be inserted into and removed from the spring push.Type: ApplicationFiled: June 4, 2021Publication date: September 21, 2023Applicant: Fujikura Ltd.Inventor: Masayuki Hirose
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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
