Patents by Inventor Shigenori Aoki
Shigenori Aoki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140363129Abstract: An optical connector includes an optical fiber, and a ferrule configured to hold the optical fiber, wherein the ferrule has a front part, a rear part, a deformable mechanism to connect between the front part and the rear part, and an opening to allow the optical fiber to bend along with displacement of the deformable mechanism, and wherein the deformable mechanism has a restrictor to restrict the displacement or deformation of the deformable mechanism, the restrictor being provided at least between the deformable mechanism and the front part or between the deformable mechanism and the rear part.Type: ApplicationFiled: May 28, 2014Publication date: December 11, 2014Applicants: FUJITSU LIMITED, FURUKAWA ELECTRIC CO., LTD.Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka, Katsuki Suematsu, Mitsuhiro Iwaya
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Patent number: 8876412Abstract: An optical connector includes a fiber holder to hold optical fibers; a housing to accommodate the optical fibers and the fiber holder; and a thermally driven actuator to displace at least a part of the fiber holder upon application of heat from a first position at which the fiber holder is retracted inside the housing to a second position that allows the optical fibers to be optically coupled to a counterpart connector.Type: GrantFiled: July 30, 2012Date of Patent: November 4, 2014Assignee: Fujitsu LimitedInventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
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Publication number: 20140217842Abstract: To uniformly cool down armature windings along the circumferential direction of a stator in a generator motor. A generator motor includes a stator 1 fixed to the inner diameter side of a housing 18, a rotor 130 rotatably supported by bearings 5, and armature windings wound around the teeth of a stator core 110. Each of brackets 200 provided via the bearings 5 has a passage 201, 202 through which cooling oil flows and injection holes 204 which communicate with the passage and inject cooling oil at positions opposite to winding ends of the armature windings. Cooling oil is injected toward the winding ends of the armature windings from the injection holes 204 of the brackets 200 arranged on opposite axial sides of a shaft 6. In the flow rate distribution of the oil from the plurality of the injection holes 204, the flow rate of the oil from any of the injection holes 204 is set to be greater as the position of the injection hole 204 is higher above the level of the shaft 6.Type: ApplicationFiled: August 13, 2012Publication date: August 7, 2014Inventors: Satoshi Kikuchi, Seiji Ishida, Tsutomu Miyoshi, Itsuro Sawada, Makoto Ishijima, Shigenori Aoki
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Publication number: 20140079354Abstract: A method for producing an optical connector includes making only the core jut spherically from an end facet of an optical fiber by arc discharge, the optical fiber having a difference in index of refraction between a core and a clad at 1% to 3% by adding dopant that increases an index of refraction of the core and lowers a melting point of the core, and mounting the optical fiber processed by the arc discharge in a ferrule.Type: ApplicationFiled: July 25, 2013Publication date: March 20, 2014Applicant: FUJITSU LIMITEDInventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
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Publication number: 20130084045Abstract: An optical connector includes a fiber holder to hold optical fibers; a housing to accommodate the optical fibers and the fiber holder; and a thermally driven actuator to displace at least a part of the fiber holder upon application of heat from a first position at which the fiber holder is retracted inside the housing to a second position that allows the optical fibers to be optically coupled to a counterpart connector.Type: ApplicationFiled: July 30, 2012Publication date: April 4, 2013Applicant: FUJITSU LIMITEDInventors: Tsuyoshi AOKI, Shigenori Aoki, Hidenobu Muranaka
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Publication number: 20130071063Abstract: An optical connector includes: a holding member that holds an optical transmission line; a lens member that has a lens; a concavo-convex structure provided between the holding member and the lens member; and a moving member that moves the concavo-convex structure between a first state where a protrusion and a recess of the concavo-convex structure are engaged with each other and a second state where a gap is formed between the protrusion and the recess.Type: ApplicationFiled: June 27, 2012Publication date: March 21, 2013Applicant: FUJITSU LIMITEDInventors: Tsuyoshi AOKI, Shigenori Aoki, Hidenobu Muranaka
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Publication number: 20120312506Abstract: A loop heat pipe includes an evaporator to vaporize a working fluid due to heat supplied from an external heat source; a condenser to cause the vaporized working fluid to condense; and connecting lines to connect the evaporator and the condenser in a loop, wherein the evaporator includes a first space defined by a set of walls including a contact wall that comes into contact with the external heat source, a second space provided adjacent to at least one of the walls other than the contact wall, and a through-hole formed in a dividing wall separating the first space and the second space to allow the first space and the second space to communicate with each other.Type: ApplicationFiled: August 22, 2012Publication date: December 13, 2012Applicant: FUJITSU LIMITEDInventors: Hiroki UCHIDA, Takeshi SHIOGA, Shigenori AOKI, Susumu OGATA, Hideaki NAGAOKA
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Publication number: 20120237168Abstract: An optical connector includes a fiber holder with guide holes for guiding optical fibers, a space communicating with the guide holes and to accommodate the optical fibers, and a deformable member that forms at least a part of the fiber holder and causes the space to deform or displace to allow a part or all of the optical fibers to bend in the space.Type: ApplicationFiled: January 27, 2012Publication date: September 20, 2012Applicants: FURUKAWA ELECTRIC CO., LTD., FUJITSU LIMITEDInventors: Tsuyoshi AOKI, Shigenori AOKI, Hidenobu MURANAKA, Mitsuhiro IWAYA, Tsunetoshi SAITO, Katsuki SUEMATSU
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Publication number: 20120227954Abstract: A loop heat pipe system includes: a loop heat pipe (LHP) including an evaporator, a condenser, a vapor line, and a liquid; a temperature sensor to measure temperature of part of the LHP, a working fluid portion in which has different phases in a situation where the LHP functions as a heat transport device and in a situation where the LHP dose not function as a heat transport device and a liquid phase of the working fluid dose not exist in the evaporator; a heater to heat a heating target part of the vapor line; and a controller, in order to start the LHP, to turn on the heater, to monitor temperature of the heating target part using the temperature sensor, and to turn off the heater when detecting a change caused by condensation of a vapor phase of the working fluid in the monitored temperature.Type: ApplicationFiled: May 17, 2012Publication date: September 13, 2012Applicant: FUJITSU LIMITEDInventors: Hiroki UCHIDA, Takeshi Shioga, Shigenori Aoki, Susumu Ogata, Hideaki Nagaoka
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Publication number: 20120132402Abstract: A loop heat pipe includes: a first evaporator and a second evaporator each of which vaporizes a liquid-phase working fluid and converts the liquid-phase working fluid to a vapor-phase working fluid; a first condenser and a second condenser each of which condenses the vapor-phase working fluid and converts the vapor-phase working fluid back to the liquid-phase working fluid; a first vapor line through which the working fluid converted to the vapor phase is transported to the first condenser; a first liquid line through which the working fluid converted to the liquid phase is transported to the second evaporator; a second vapor line through which the working fluid converted to the vapor phase is transported to the second condenser; and a second liquid line through which the working fluid converted to the liquid phase is transported to the first evaporator.Type: ApplicationFiled: December 13, 2011Publication date: May 31, 2012Applicant: FUJITSU LIMITEDInventors: Shigenori Aoki, Takeshi Shioga, Hiroki Uchida
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Patent number: 8090266Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.Type: GrantFiled: November 26, 2007Date of Patent: January 3, 2012Assignee: Fujitsu LimitedInventors: Alexei L. Glebov, Shigenori Aoki
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Publication number: 20110243516Abstract: An optical waveguide device includes optical waveguide wiring in which an optical waveguide crosses, and a relay part arranged at a crossing part of the optical waveguide and having a refractive index higher than that of a core of the optical waveguide.Type: ApplicationFiled: January 31, 2011Publication date: October 6, 2011Applicant: FUJITSU LIMITEDInventor: Shigenori AOKI
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Publication number: 20090317035Abstract: An optical module includes a substrate, one or a plurality of planar optical devices mounted on the substrate, and a waveguide block including one or a plurality of curved waveguides formed on a plane. The waveguide block is mounted on the substrate such that the plane on which the curved waveguides are formed is perpendicular to the substrate and the curved waveguides and an incidence face or an emitting face of the planar optical device are opposed to each other on one end face of the waveguide block. Further, the waveguide block is configured so that an optical fiber can be connected to the other end face of the waveguide block which is orthogonal to the one end face.Type: ApplicationFiled: June 25, 2009Publication date: December 24, 2009Applicant: Fujitsu LimitedInventors: Shigenori AOKI, Masayuki KATO
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Patent number: 7609922Abstract: An optical module includes a substrate, one or a plurality of planar optical devices mounted on the substrate, and a waveguide block including one or a plurality of curved waveguides formed on a plane. The waveguide block is mounted on the substrate such that the plane on which the curved waveguides are formed is perpendicular to the substrate and the curved waveguides and an incidence face or an emitting face of the planar optical device are opposed to each other on one end face of the waveguide block. Further, the waveguide block is configured so that an optical fiber can be connected to the other end face of the waveguide block which is orthogonal to the one end face.Type: GrantFiled: June 28, 2006Date of Patent: October 27, 2009Assignee: Fujitsu LimitedInventors: Shigenori Aoki, Masayuki Kato
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Patent number: 7565047Abstract: Disclosed is an optical waveguide structure capable of keeping intervals between the structure and optical elements within a certain range. When arranging a surface light emitting element and a surface light receiving element on a positioning plate provided on a substrate, elastic layers are provided between the elements and the plate. When fitting and fixing first projections of the structure in holes of the plate, second projections formed in a predetermined dimension on the structure are brought into contact with the light emitting element and the light receiving element. Therefore, intervals between lenses, and the light emitting element as well as the light receiving element are controlled within a certain range according to the dimension of the second projections. Further, stress occurring due to contact is dispersed by the elastic layers so that breakage of the light emitting element and the light receiving element can be prevented.Type: GrantFiled: October 19, 2005Date of Patent: July 21, 2009Assignee: Fujitsu LimitedInventors: Motoyuki Nishizawa, Akio Sugama, Shigenori Aoki
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Patent number: 7565044Abstract: An optical module with a first optical waveguide substrate having end faces; a second optical waveguide substrate which includes a first optical waveguide, a second optical waveguide, and end faces, the second optical waveguide substrate having an opening between the first optical waveguide and the second optical waveguide; and a first deflection device which is mounted in the opening, wherein one of the end faces of the first optical waveguide substrate and one of the end faces of the second optical waveguide substrate are coupled to each other.Type: GrantFiled: February 20, 2008Date of Patent: July 21, 2009Assignee: Fujitsu LimitedInventors: Tomoyuki Akahoshi, Akio Sugama, Shigenori Aoki
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Publication number: 20090136236Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.Type: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Applicant: Fujitsu LimitedInventors: Alexei L. Glebov, Shigenori Aoki
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Patent number: 7536066Abstract: In a semiconductor chip module, a transmission optical waveguide device to be mounted in the proximity of the side face of a semiconductor chip on a circuit board includes an input optical waveguide to which light from an external light source is inputted, an output optical waveguide provided at a position displaced in a vertical direction to the surface of the circuit board in a mounted state on the circuit with respect to the input optical waveguide for outputting an optical signal to a different device, an optical path changeover structure for guiding light guided through the input optical waveguide to the output optical waveguide, and an optical modulator provided on the input optical waveguide or the output optical waveguide for modulating light from the external light source based on an electric signal from the semiconductor chip.Type: GrantFiled: January 24, 2008Date of Patent: May 19, 2009Assignee: Fujitsu LimitedInventors: Masayuki Kato, Shigenori Aoki
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Patent number: 7522788Abstract: An optical module with a plurality of optical waveguide substrates having element mounting openings and end surfaces which are adhered to each other with an optical adhesive; and a plurality of light deflecting element arrays mounted to the respective element mounting openings of the plurality of optical waveguide substrates, the plurality of light deflecting element arrays including a plurality of light deflecting elements.Type: GrantFiled: January 9, 2008Date of Patent: April 21, 2009Assignee: Fujitsu LimitedInventors: Tomoyuki Akahoshi, Akio Sugama, Shigenori Aoki
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Patent number: 7424188Abstract: The optical module includes a first optical waveguide part including a first waveguide core, a second optical waveguide part including a second waveguide core and provided such that the second waveguide core and the first waveguide core are positioned partially close to each other so that a light propagating in one of the first and second waveguide cores can be coupled to the other of the first and second waveguide cores, an electro-optic material layer provided between the first and second waveguide cores and formed from an electro-optic material, and an electrode for applying an electric field to the electro-optic material layer so that the refractive index of the electro-optic material layer varies and the optical coupling coefficient between the first and second waveguide cores varies.Type: GrantFiled: October 27, 2005Date of Patent: September 9, 2008Assignee: Fujitsu LimitedInventor: Shigenori Aoki