Patents by Inventor Hirotaka ASADA
Hirotaka ASADA 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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Patent number: 11966087Abstract: A ferrule structure includes a ferrule including a plurality of unit holes, and a plurality of lens units, wherein each lens unit includes a lens part attached to an end part of an optical fiber, and each lens unit is molded from a resin for transmittance an optical signal, and each lens unit is to be inserted in one of the unit holes.Type: GrantFiled: October 3, 2019Date of Patent: April 23, 2024Assignee: Fujikura Ltd.Inventors: Hirotaka Asada, Akihiro Nakama, Akito Nishimura, Takahiko Sabano
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Patent number: 11947170Abstract: A connector system includes: a first ferrule configured to hold end parts of multi-core fibers; a second ferrule configured to hold end parts of single-core fibers; and an optical connection member. The optical connection member is arranged between the first and the second ferrule, and includes an optical system configured to optically connect respective cores included in the multi-core fibers and the single-core fibers. A guide pin is formed on one of the first and the second ferrule, and a guide hole is formed in another of the first and the second ferrule. A through hole is formed in the optical connection member, and the first ferrule, the optical connection member, and the second ferrule can be aligned by fitting the guide pin in the guide hole through the through hole.Type: GrantFiled: October 2, 2019Date of Patent: April 2, 2024Assignee: Fujikura Ltd.Inventors: Hirotaka Asada, Kansei Shindo, Kunihiko Fujiwara
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Publication number: 20240019643Abstract: A boot configured to be attached to a ferrule includes: a fiber insertion hole into which optical fibers are inserted; a lower part on one side with respect to the fiber insertion hole; and an upper part on another side with respect to the fiber insertion hole. The fiber insertion hole is disposed to correspond with fiber holes of the ferrule that are disposed in an array in one direction. The upper part includes a protrusion part that protrudes relative to an end surface of the lower part in a fiber insertion direction. The ferrule includes: an adhesive filling part configured to be filled with an adhesive; and a stepped part that guides the optical fibers into the fiber holes.Type: ApplicationFiled: August 25, 2021Publication date: January 18, 2024Applicant: FUJIKURA LTD.Inventor: Hirotaka Asada
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Publication number: 20230408774Abstract: A ferrule includes a main body including inner and outer walls and a connection end surface at which a tip of an optical fiber is to be disposed. The inner wall has fiber holes. The ferrule includes an adhesive filling part disposed in the main body on an opposite side from the connection end surface with respect to the inner wall, an upper opening that opens from the outer wall to the adhesive filling part, and a lower opening that opens from the outer wall to the adhesive filling part and is disposed on an opposite side from the upper opening. The inner wall has a first surface and a second surface protruding toward the adhesive filling part from the first surface. The upper opening is opened in a location along the first surface. The lower opening is opened in a location along the second surface.Type: ApplicationFiled: August 25, 2021Publication date: December 21, 2023Applicant: Fujikura Ltd.Inventor: Hirotaka Asada
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Patent number: 11675142Abstract: A ferrule includes: a ferrule body including a first body-side guide hole into which a first guide pin is inserted, a second body-side guide hole into which a second guide pin is inserted, and an optical fiber holder that holds an optical fiber; and a lens plate including a first plate-side guide hole into which the first guide pin is inserted, a second plate-side guide hole into which the second guide pin is inserted, a lens part, and an abutment surface that an end face of the optical fiber abuts. The first guide pin fits the first body-side guide hole and the first plate-side guide hole. The second guide pin fits one of the second body-side guide hole or the second plate-side guide hole.Type: GrantFiled: September 17, 2019Date of Patent: June 13, 2023Assignee: Fujikura Ltd.Inventors: Akihiro Nakama, Hirotaka Asada
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Patent number: 11467352Abstract: A ferrule includes: a main body configured to hold an end of a first optical fiber and an end of a second optical fiber parallel to the first optical fiber; and a lens plate including a first abutment surface configured to abut against an end face of the first optical fiber, a second abutment surface configured to abut against an end face of the second optical fiber, a first lens configured to face the end face of the first optical fiber, and a second lens configured to face the end face of the second optical fiber. The first abutment surface is inclined with respect to a plane perpendicular to a first optical axis of the first optical fiber. The second abutment surface is inclined with respect to a plane perpendicular to a second optical axis of the second optical fiber.Type: GrantFiled: September 17, 2019Date of Patent: October 11, 2022Assignee: Fujikura Ltd.Inventors: Akihiro Nakama, Hirotaka Asada
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Patent number: 11448834Abstract: A ferrule structure includes: a ferrule body including a body-side guide hole for insertion of a guide pin, and a holding hole that holds light guide members forming light guides; a lens plate including a plate-side guide hole for insertion of the guide pin, and a lens array that includes lenses aligned to the light guides; and a recessed part in an end part of at least one of the body-side guide hole and the plate-side guide hole on an adhesion surface side.Type: GrantFiled: August 6, 2018Date of Patent: September 20, 2022Assignee: Fujikura Ltd.Inventors: Akihiro Nakama, Hirotaka Asada
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Patent number: 11372164Abstract: An optical connector system includes: an optical path-changing device including a fiber-holding part that holds a single-mode optical fiber along a first direction, and a reflection surface that reflects an optical signal; and a relay device on a substrate. The substrate includes a grating coupler for inputting/outputting an optical signal in a second direction that is inclined with respect to a direction perpendicular to a surface of the substrate. The optical path-changing device and the relay device each have an input/output surface to/from which the optical signal is inputted/outputted. A first convex lens is disposed on the input/output surface of the optical path-changing device. A second convex lens is disposed on the input/output surface of the relay device.Type: GrantFiled: March 26, 2019Date of Patent: June 28, 2022Assignee: FUJIKURA LTD.Inventors: Takahiko Sabano, Akito Nishimura, Susumu Nakaya, Hirotaka Asada
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Publication number: 20220075124Abstract: A ferrule structure includes a ferrule including a plurality of unit holes, and a plurality of lens units, wherein each lens unit includes a lens part attached to an end part of an optical fiber, and each lens unit is molded from a resin for transmittance an optical signal, and each lens unit is to be inserted in one of the unit holes.Type: ApplicationFiled: October 3, 2019Publication date: March 10, 2022Applicant: FUJIKURA LTD.Inventors: Hirotaka Asada, Akihiro Nakama, Akito Nishimura, Takahiko Sabano
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Publication number: 20220050250Abstract: A connector system includes: a first ferrule configured to hold end parts of multi-core fibers; a second ferrule configured to hold end parts of single-core fibers; and an optical connection member. The optical connection member is arranged between the first and the second ferrule, and includes an optical system configured to optically connect respective cores included in the multi-core fibers and the single-core fibers. A guide pin is formed on one of the first and the second ferrule, and a guide hole is formed in another of the first and the second ferrule. A through hole is formed in the optical connection member, and the first ferrule, the optical connection member, and the second ferrule can be aligned by fitting the guide pin in the guide hole through the through hole.Type: ApplicationFiled: October 2, 2019Publication date: February 17, 2022Applicant: FUJIKURA LTD.Inventors: Hirotaka Asada, Kansei Shindo, Kunihiko Fujiwara
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Publication number: 20220019033Abstract: A ferrule includes: a ferrule body including a first body-side guide hole into which a first guide pin is inserted, a second body-side guide hole into which a second guide pin is inserted, and an optical fiber holder that holds an optical fiber; and a lens plate including a first plate-side guide hole into which the first guide pin is inserted, a second plate-side guide hole into which the second guide pin is inserted, a lens part, and an abutment surface that an end face of the optical fiber abuts. The first guide pin fits the first body-side guide hole and the first plate-side guide hole. The second guide pin fits one of the second body-side guide hole or the second plate-side guide hole.Type: ApplicationFiled: September 17, 2019Publication date: January 20, 2022Applicant: FUJIKURA LTD.Inventors: Akihiro Nakama, Hirotaka Asada
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Publication number: 20220003940Abstract: A ferrule includes: a main body configured to hold an end of a first optical fiber and an end of a second optical fiber parallel to the first optical fiber; and a lens plate including a first abutment surface configured to abut against an end face of the first optical fiber, a second abutment surface configured to abut against an end face of the second optical fiber, a first lens configured to face the end face of the first optical fiber, and a second lens configured to face the end face of the second optical fiber. The first abutment surface is inclined with respect to a plane perpendicular to a first optical axis of the first optical fiber. The second abutment surface is inclined with respect to a plane perpendicular to a second optical axis of the second optical fiber.Type: ApplicationFiled: September 17, 2019Publication date: January 6, 2022Applicant: FUJIKURA LTD.Inventors: Akihiro Nakama, Hirotaka Asada
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Patent number: 11199667Abstract: An optical-fiber-attached ferrule includes: an optical fiber hole into which an optical fiber is inserted and fixed with a first adhesive; and an adhesive-filling section including an opening surface and an opposed surface opposite the opening surface. The adhesive-filling section is filled with a second adhesive that is softer than the first adhesive with an end surface of the optical fiber positioned closer to the opposed surface than to the opening surface.Type: GrantFiled: March 15, 2017Date of Patent: December 14, 2021Assignee: Fujikura Ltd.Inventors: Akihiro Nakama, Shigeo Takahashi, Hirotaka Asada
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Publication number: 20210239909Abstract: An optical connector system includes: an optical path-changing device including a fiber-holding part that holds a single-mode optical fiber along a first direction, and a reflection surface that reflects an optical signal; and a relay device on a substrate. The substrate includes a grating coupler for inputting/outputting an optical signal in a second direction that is inclined with respect to a direction perpendicular to a surface of the substrate. The optical path-changing device and the relay device each have an input/output surface to/from which the optical signal is inputted/outputted. A first convex lens is disposed on the input/output surface of the optical path-changing device. A second convex lens is disposed on the input/output surface of the relay device.Type: ApplicationFiled: March 26, 2019Publication date: August 5, 2021Applicant: Fujikura Ltd.Inventors: Takahiko Sabano, Akito Nishimura, Susumu Nakaya, Hirotaka Asada
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Publication number: 20210208343Abstract: An optical-fiber-attached ferrule includes: an optical fiber hole into which an optical fiber is inserted and fixed with a first adhesive; and an adhesive-filling section including an opening surface and an opposed surface opposite the opening surface. The adhesive-filling section is filled with a second adhesive that is softer than the first adhesive with an end surface of the optical fiber positioned closer to the opposed surface than to the opening surface.Type: ApplicationFiled: March 15, 2017Publication date: July 8, 2021Applicant: FUJIKURA LTD.Inventors: Akihiro Nakama, Shigeo Takahashi, Hirotaka Asada
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Publication number: 20210132299Abstract: A cleaning tool that cleans an optical connector includes an adhesive body that contacts an optical signal region of the optical connector where an optical signal enters and is emitted from the optical connector; and a base that holds the adhesive body. The base includes a first protrusion on a holding surface of a holding part that holds the adhesive body. The first protrusion is disposed at a rear side of a section of the adhesive body and is in contact with the optical signal region.Type: ApplicationFiled: March 6, 2018Publication date: May 6, 2021Applicants: FUJIKURA LTD., TOMOEGAWA CO., LTD.Inventors: Akihiro Nakama, Shigeo Takahashi, Hirotaka Asada, Makoto Goto, Masayoshi Suzuki
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Patent number: 10962725Abstract: A ferrule structure includes: a holding aperture that holds light guide members forming light guides; a recess that is recessed from a connection end surface with respect to a mating ferrule; a first lens array on a base surface that is a bottom surface of the recess; and a first groove that is recessed from the base surface and is on an outer side of the first lens array. The first lens array includes lenses that are aligned with the light guides.Type: GrantFiled: August 6, 2018Date of Patent: March 30, 2021Assignee: Fujikura Ltd.Inventors: Akihiro Nakama, Hirotaka Asada
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Publication number: 20200371298Abstract: A ferrule structure includes: a ferrule body including a body-side guide hole for insertion of a guide pin, and a holding hole that holds light guide members forming light guides; a lens plate including a plate-side guide hole for insertion of the guide pin, and a lens array that includes lenses aligned to the light guides; and a recessed part in an end part of at least one of the body-side guide hole and the plate-side guide hole on an adhesion surface side.Type: ApplicationFiled: August 6, 2018Publication date: November 26, 2020Applicant: FUJIKURA LTD.Inventors: Akihiro Nakama, Hirotaka Asada
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Patent number: D962177Type: GrantFiled: September 3, 2020Date of Patent: August 30, 2022Assignee: Fujikura Ltd.Inventors: Hirotaka Asada, Shigeo Takahashi
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Patent number: D964292Type: GrantFiled: September 3, 2020Date of Patent: September 20, 2022Assignee: Fujikura Ltd.Inventors: Hirotaka Asada, Shigeo Takahashi