Patents by Inventor Yuuichi Mitose
Yuuichi Mitose 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: 20230375792Abstract: The optical connection structure includes: optical fibers disposed such that end faces are arranged in a first direction; an optical functional component having a first surface facing the end faces of the optical fibers; a holding member having a second surface facing the first surface and directly or indirectly fixed to the first surface, a third surface facing away from the second surface, and a fiber holding holes extending from the third surface toward the second surface and respectively accommodating the optical fibers; and a distortion suppression member having a fourth surface facing the third surface and directly or indirectly fixed to the third surface and sandwiching the holding member with the optical functional component. Thermal expansion coefficients of the optical functional component and the distortion suppression member are higher or lower than a thermal expansion coefficient of the holding member.Type: ApplicationFiled: December 20, 2021Publication date: November 23, 2023Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Tsutaru KUMAGAI, Tetsuya NAKANISHI, Hajime ARAO, Yuuichi MITOSE
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Patent number: 10823917Abstract: The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [l/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference ?1 of the core, a relative refractive index difference ?2 of the first cladding, and a relative refractive index difference ?3 of the second cladding satisfy relationships of ?1>?2>?3 and ?3<?0.5 [%]. The product V3 of the ?3 and a cross-sectional area S of the second cladding is less than ?200 [%·?m2]. The curvature in the bent portion is 0.6 [l/mm] or less over an entire length of the bent portion.Type: GrantFiled: December 12, 2019Date of Patent: November 3, 2020Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yasuomi Kaneuchi, Yuuichi Mitose
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Publication number: 20200116948Abstract: The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [l/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference ?1 of the core, a relative refractive index difference ?2 of the first cladding, and a relative refractive index difference ?3 of the second cladding satisfy relationships of ?1>?2>?3 and ?3<?0.5 [%]. The product V3 of the ?3 and a cross-sectional area S of the second cladding is less than ?200 [%·?m2]. The curvature in the bent portion is 0.6 [l/mm] or less over an entire length of the bent portion.Type: ApplicationFiled: December 12, 2019Publication date: April 16, 2020Inventors: Tetsuya NAKANISHI, Yasuomi KANEUCHI, Yuuichi MITOSE
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Patent number: 10605993Abstract: The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.Type: GrantFiled: December 28, 2018Date of Patent: March 31, 2020Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yuuichi Mitose, Tetsuya Nakanishi, Takashi Sasaki, Naoki Matsushita
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Patent number: 10539746Abstract: The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [1/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference ?1 of the core, a relative refractive index difference ?2 of the first cladding, and a relative refractive index difference ?3 of the second cladding satisfy relationships of ?1>?2>?3 and ?3 <?0.5[%]. The product V3 of the ?3 and a cross-sectional area S of the second cladding is less than ?200 [%·?m2]. The curvature in the bent portion is 0.6 [1/mm] or less over an entire length of the bent portion.Type: GrantFiled: January 30, 2018Date of Patent: January 21, 2020Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yasuomi Kaneuchi, Yuuichi Mitose
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Publication number: 20190137693Abstract: The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.Type: ApplicationFiled: December 28, 2018Publication date: May 9, 2019Inventors: Yuuichi Mitose, Tetsuya Nakanishi, Takashi Sasaki, Naoki Matsushita
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Publication number: 20180156987Abstract: The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [l/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference ?1 of the core, a relative refractive index difference ?2 of the first cladding, and a relative refractive index difference ?3 of the second cladding satisfy relationships of ?1>?2>?3 and ?3<?0.5[%]. The product V3 of the ?3 and a cross-sectional area S of the second cladding is less than ?200[%·?m2]. The curvature in the bent portion is 0.6 [l/mm] or less over an entire length of the bent portion.Type: ApplicationFiled: January 30, 2018Publication date: June 7, 2018Inventors: Tetsuya Nakanishi, Yasuomi Kaneuchi, Yuuichi Mitose
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Publication number: 20180136409Abstract: The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.Type: ApplicationFiled: January 11, 2018Publication date: May 17, 2018Inventors: Yuuichi Mitose, Tetsuya Nakanishi, Takashi Sasaki, Naoki Matsushita
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Patent number: 9676660Abstract: An embodiment of the invention relates to a bent optical fiber manufacturing method for manufacturing a bent optical fiber in which a bent region with a desired radius of curvature is formed, while maintaining an optical transmission loss within a permissible range. The method has a pre-step of preparing an optical fiber comprised of silica-based glass, a bend portion forming step of forming a bend portion in a partial region of the optical fiber, and a laser light irradiating step of irradiating the thus-formed bend portion with laser light.Type: GrantFiled: May 18, 2015Date of Patent: June 13, 2017Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yasuomi Kaneuchi, Yuuichi Mitose, Takashi Sasaki, Tetsuya Nakanishi, Tetsuya Hayashi, Masayuki Kato
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Patent number: 9551835Abstract: A GRIN lens array of an embodiment has a structure for enabling a coupling face in which lens end faces of GRIN lenses are arranged, to be accurately polished so as to have a desired angle relative to optical axes of the GRIN lenses. The GRIN lens array has the GRIN lenses and a main body portion. The main body portion comprises a holding portion having a coupling face, and an edge portion having a reference face to be used as a reference in polishing of the coupling face. The respective thicknesses of the holding portion and the edge portion along the longitudinal direction of the GRIN lenses are set so as to form a step between the coupling face and the reference face.Type: GrantFiled: November 5, 2015Date of Patent: January 24, 2017Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Dai Sasaki, Masaki Ohmura, Osamu Shimakawa, Hajime Arao, Yuuichi Mitose, Takuro Watanabe, Motoyoshi Kimura
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Publication number: 20160139339Abstract: A GRIN lens array of an embodiment has a structure for enabling a coupling face in which lens end faces of GRIN lenses are arranged, to be accurately polished so as to have a desired angle relative to optical axes of the GRIN lenses. The GRIN lens array has the GRIN lenses and a main body portion. The main body portion comprises a holding portion having a coupling face, and an edge portion having a reference face to be used as a reference in polishing of the coupling face. The respective thicknesses of the holding portion and the edge portion along the longitudinal direction of the GRIN lenses are set so as to form a step between the coupling face and the reference face.Type: ApplicationFiled: November 5, 2015Publication date: May 19, 2016Inventors: Dai SASAKI, Masaki OHMURA, Osamu SHIMAKAWA, Hajime ARAO, Yuuichi MITOSE, Takuro WATANABE, Motoyoshi KIMURA
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Publication number: 20160016843Abstract: The present invention relates to a method for manufacturing a bent optical fiber while suppressing diameter reduction of the optical fiber and realizing a desired radius of curvature thereof. In an optical fiber prepared, a plurality of irradiation regions arranged along the longitudinal direction of the optical fiber are set as a heated section with infrared laser pulsed light. In each irradiation region, the optical fiber is bent at a predetermined angle in a bend processing portion softened by irradiation with the infrared laser pulsed light. The optical fiber is bent in the bend processing portions of all the irradiation regions, thereby obtaining a bent optical fiber having a predetermined radius of curvature in the heated section.Type: ApplicationFiled: November 5, 2014Publication date: January 21, 2016Inventors: Yasuomi KANEUCHI, Yuuichi MITOSE
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Publication number: 20150336842Abstract: An embodiment of the invention relates to a bent optical fiber manufacturing method for manufacturing a bent optical fiber in which a bent region with a desired radius of curvature is formed, while maintaining an optical transmission loss within a permissible range. The method has a pre-step of preparing an optical fiber comprised of silica-based glass, a bend portion forming step of forming a bend portion in a partial region of the optical fiber, and a laser light irradiating step of irradiating the thus-formed bend portion with laser light.Type: ApplicationFiled: May 18, 2015Publication date: November 26, 2015Inventors: Yasuomi KANEUCHI, Yuuichi MITOSE, Takashi SASAKI, Tetsuya NAKANISHI, Tetsuya HAYASHI, Masayuki KATO
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Patent number: 8983256Abstract: An optical fiber cable is provided as one capable of preventing damage of an inside tube and an outside tube. An optical fiber cable 1 is provided with an optical fiber 2 for propagating laser light, an inside tube 3 housing an end portion of this optical fiber 2, and an outside tube 4 arranged outside the inside tube 3 and surrounding the inside tube 3. A space portion 5 is provided between the optical fiber 2 and an inner peripheral surface of the inside tube 3.Type: GrantFiled: April 23, 2012Date of Patent: March 17, 2015Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuhisa Konishi, Tomohiko Kanie, Kenichiro Takahashi, Osamu Shimakawa, Yuuichi Mitose
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Publication number: 20150043871Abstract: An optical connector is an optical connector for converting optical paths of an MCF arranged in a first arrangement into a second arrangement. A plurality of cores are arranged in three stages in the first arrangement and one stage in the second arrangement. The optical connector comprises a first end 10, placed on the MCF side, for arranging respective one ends of optical fibers in the first arrangement. The optical connector also comprises a second end for arranging the respective other ends or middle parts of the plurality of optical fibers in the second arrangement. A plurality of optical fibers arranged at the n-th stage in the first end do not intersect each other in a space as seen in a second direction.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Inventor: Yuuichi MITOSE
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Publication number: 20140050448Abstract: An optical fiber cable is provided as one capable of preventing damage of an inside tube and an outside tube. An optical fiber cable 1 is provided with an optical fiber 2 for propagating laser light, an inside tube 3 housing an end portion of this optical fiber 2, and an outside tube 4 arranged outside the inside tube 3 and surrounding the inside tube 3. A space portion 5 is provided between the optical fiber 2 and an inner peripheral surface of the inside tube 3.Type: ApplicationFiled: April 23, 2012Publication date: February 20, 2014Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuhisa Konishi, Tomohiko Kanie, Kenichiro Takahashi, Osamu Shimakawa, Yuuichi Mitose
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Patent number: D799429Type: GrantFiled: September 25, 2015Date of Patent: October 10, 2017Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yuuichi Mitose, Hiroshi Kohda, Jun Ito, Takeyuki Ishii, Takashi Sasaki
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Patent number: D799430Type: GrantFiled: September 25, 2015Date of Patent: October 10, 2017Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yuuichi Mitose, Hiroshi Kohda, Takashi Sasaki, Takeyuki Ishii, Jun Ito
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Patent number: D811342Type: GrantFiled: September 25, 2015Date of Patent: February 27, 2018Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yuuichi Mitose, Takashi Sasaki, Jun Ito, Takeyuki Ishii, Toshiki Taru, Kazunari Hattori, Naoki Matsushita, Yasuomi Kaneuchi
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Patent number: D821330Type: GrantFiled: August 25, 2017Date of Patent: June 26, 2018Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuya Nakanishi, Yuuichi Mitose, Hiroshi Kohda, Takashi Sasaki, Jun Ito, Takeyuki Ishii