Patents by Inventor Takayoshi Mori
Takayoshi Mori 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: 20240142696Abstract: An objective of the present invention is to provide a mode conversion device capable of designing any coupling efficiency and full width at half maximum, and a design method therefor. According to the present invention, a mode conversion device includes a long period grating at a core of an optical fiber through which light is able to propagate in at least two propagation modes. The long period grating satisfies a relationship of Expression C1, where a full width at half maximum FWHM is a wavelength band in which the coupling efficiency is a half of coupling efficiency of mode conversion at a center wavelength, C is coupling efficiency, Lc is a complete coupling length, Lg is a grating length, ? is a grating pitch, and ?? is a propagation constant difference between the two propagation modes at the center wavelength of a mode conversion target. [ Math .Type: ApplicationFiled: February 17, 2021Publication date: May 2, 2024Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoko YAMASHITA, Takayoshi MORI, Takashi MATSUI, Kazuhide NAKAJIMA
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Publication number: 20240120541Abstract: Please substitute the new Abstract submitted herewith for the original Abstract: According to a nonaqueous electrolytic solution containing: a compound represented by the General Formula (1); a solute; and a nonaqueous organic solvent, a nonaqueous electrolytic solution battery, and a compound represented by General Formula (1), a nonaqueous electrolytic solution and a nonaqueous electrolytic solution battery having a low initial resistance value, and a compound that can be suitably used for the above nonaqueous electrolytic solution are provided,Type: ApplicationFiled: January 14, 2022Publication date: April 11, 2024Inventors: Ryosuke TERADA, Wataru KAWABATA, Katsumasa MORI, Takayoshi MORINAKA, Mikihiro TAKAHASHI
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Patent number: 11946133Abstract: A production method for a glass roll includes a start preparation step (S1) of feeding-out a first lead film (LF1) coupled to a starting end portion (GFa) of a first glass film (GF1) from an unwinding device (3) and allowing a winding device (8) to wind the first lead film (LF1 after passing of the first lead film (LF1) through a thermal film-forming device (4),). The start preparation step (S1) includes a temperature increasing step of causing the thermal film-forming device (4) to be increased in temperature to a film-forming temperature. The first glass film (GF1) reaches the thermal film-forming device (4) before the thermal film-forming device (4) is increased in temperature to the film-forming temperature.Type: GrantFiled: May 22, 2020Date of Patent: April 2, 2024Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Hiroki Mori, Takayoshi Saito, Naotoshi Inayama, Riku Yamashiro
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Patent number: 11472956Abstract: A resin composition for forming a phase-separated structure containing a block copolymer having a first block and a second block, in which the first block is formed of a constituent unit represented by Formula (b1), the second block is formed of a constituent unit represented by Formula (b2m) and a random copolymer having a constituent unit represented by Formula (b2g), and a ratio of a volume of the first block is 20% to 80% by volume.Type: GrantFiled: July 12, 2021Date of Patent: October 18, 2022Assignees: TOKYO OHKA KOGYO CO., LTD., TOKYO INSTITUTE OF TECHNOLOGYInventors: Teruaki Hayakawa, Lei Dong, Takahiro Dazai, Ken Miyagi, Takayoshi Mori, Daisuke Kawana
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Patent number: 11292964Abstract: Provided is a new phosphor which can be excited by visible light in a wide band to emit a broad fluorescence spectrum, and also to emit near-infrared light with high intensity. Proposed is a phosphor, which is an oxide comprising Ca, Cu, and Si, wherein the containing molar ratios of the elements are 0.15?Ca/Si<0.25 and 0.13?Cu/Si<0.25.Type: GrantFiled: February 14, 2017Date of Patent: April 5, 2022Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Ikuhiro Ozawa, Takayoshi Mori, Riko Sato, Jun-ichi Itoh
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Publication number: 20220017741Abstract: A resin composition for forming a phase-separated structure containing a block copolymer having a first block and a second block, in which the first block is formed of a constituent unit represented by Formula (b1), the second block is formed of a constituent unit represented by Formula (b2m) and a random copolymer having a constituent unit represented by Formula (b2g), and a ratio of a volume of the first block is 20% to 80% by volume.Type: ApplicationFiled: July 12, 2021Publication date: January 20, 2022Inventors: Teruaki HAYAKAWA, Lei DONG, Takahiro DAZAI, Ken MIYAGI, Takayoshi MORI, Daisuke KAWANA
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Patent number: 11196227Abstract: An optical amplifier of the present disclosure includes an optical resonator that includes an amplification fiber capable of amplifying signal light having one or more propagation modes and resonates at least one propagation mode of the signal light amplified by the amplification fiber; an excitation light source that outputs excitation light for exciting the amplification fiber; and a multiplexer that multiplexes the signal light and the excitation light, in which the optical resonator includes a gain clamp setting unit which sets gain clamp for at least one propagation mode out of a plurality of propagation modes resonating in the optical resonator.Type: GrantFiled: October 25, 2017Date of Patent: December 7, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masaki Wada, Shinichi Aozasa, Taiji Sakamoto, Takashi Yamamoto, Kazuhide Nakajima, Takayoshi Mori
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Patent number: 11156767Abstract: The optical fiber of the present invention includes a core, and a cladding that is provided on an outer periphery of the core and has a refractive index lower than a refractive index of the core region. In the optical fiber of the present invention, a V value representing a normalized frequency of an LP02 mode is greater than or equal to 4.8 and less than or equal to 6.4.Type: GrantFiled: July 31, 2018Date of Patent: October 26, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Azusa Urushibara, Taiji Sakamoto, Masaki Wada, Takashi Yamamoto, Kazuhide Nakajima, Takayoshi Mori
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Patent number: 10790905Abstract: The optical fiber according to the present disclosure is an optical fiber having a pure silica core which is a step index core through which an LPm1 mode with an effective area of 250 ?m2 or more is propagated by setting a relative refractive index difference to 0.60% or less, considering an effective cutoff condition, and only 2 or more modes or the LPm1 mode are propagated, with the optical fiber as the transmission line.Type: GrantFiled: July 4, 2017Date of Patent: September 29, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takayoshi Mori, Taiji Sakamoto, Takashi Yamamoto, Kazuhide Nakajima, Masaki Wada, Azusa Urushibara
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Patent number: 10782478Abstract: A differential mode attenuation compensator includes a first multi-mode optical fiber and a third multi-mode optical fiber in which a plurality of propagation modes propagate in a wavelength of a propagating optical signal; and a second multi-mode optical fiber including a core and a clad and arranged with a central axis aligned between the first multi-mode optical fiber and the third multi-mode optical fiber, in which each loss in the plurality of propagation modes is different in the first multi-mode optical fiber and the third multi-mode optical fiber.Type: GrantFiled: August 1, 2017Date of Patent: September 22, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masaki Wada, Taiji Sakamoto, Takayoshi Mori, Shinichi Aozasa, Takashi Yamamoto, Kazuhide Nakajima
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Publication number: 20200225407Abstract: The optical fiber of the present invention includes a core, and a cladding that is provided on an outer periphery of the core and has a refractive index lower than a refractive index of the core region. In the optical fiber of the present invention, a V value representing a normalized frequency of an LP02 mode is greater than or equal to 4.8 and less than or equal to 6.4.Type: ApplicationFiled: July 31, 2018Publication date: July 16, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Azusa URUSHIBARA, Taiji SAKAMOTO, Masaki WADA, Takashi YAMAMOTO, Kazuhide NAKAJIMA, Takayoshi MORI
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Patent number: 10705291Abstract: An optical transmission system according to the present disclosure is a mode multiplexed optical transmission system using a multi-mode optical fiber in which a plurality of propagation modes propagate as a transmission line, the optical transmission system including an optical fiber transmission line (83) that includes an optical fiber with two or more propagation modes; and a plurality of mode converters (91) that are configured to generate mode coupling between at least one pair of the propagation modes, in which a variation in an installation interval of the plurality of mode converters (91) is equal to or less than a threshold value determined by the transmission line length (Lt) of the optical fiber transmission line (83).Type: GrantFiled: August 25, 2017Date of Patent: July 7, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Azusa Urushibara, Takayoshi Mori, Taiji Sakamoto, Masaki Wada, Takashi Yamamoto, Kazuhide Nakajima
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Publication number: 20200192022Abstract: An optical fiber having a graded index (GI)-type core refractive index profile in which a propagation mode can propagate Z (Z is an integer of 2 or more) or more is provided. In the optical fiber, an ?-parameter is a value in which a propagation constant mutual difference is 1000 rad/m or less in a propagation mode group of a mode group M (M is M=2p+l?1 and 3 or more when a propagation mode is denoted by LPlp).Type: ApplicationFiled: June 9, 2017Publication date: June 18, 2020Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masaki WADA, Takayoshi MORI, Taiji SAKAMOTO, Takashi YAMAMOTO, Kazuhide NAKAJIMA
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Patent number: 10550321Abstract: Proposed is a phosphor capable of effectively inhibiting the occurrence of adverse influence of a sulfur-based gas while improving water resistance of the phosphor and effectively inhibiting the corrosion of a metallic member. A phosphor is proposed, which includes particles or a layer provided on the surface of a sulfur-containing phosphor, which contains sulfur in a host material, and containing a crystalline metal borate containing an IIA-Group element, boron, and oxygen.Type: GrantFiled: January 15, 2015Date of Patent: February 4, 2020Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Masaaki Inamura, Haruka Shimizu, Takayoshi Mori, Masanori Sato, Jun-ichi Itoh
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Patent number: 10538679Abstract: Provided is a phosphor, which is excited by a wide band of visible light, capable of emitting near-infrared light of high intensity. The phosphor comprises a crystal phase represented by a formula (1): MCuSi2O6 (where M comprises one or more of Ba, Sr and Ca), and a crystal phase represented by a formula (2): MCuSi4O10 (where M comprises one or more of Ba, Sr and Ca), wherein a ratio ? of a diffraction peak intensity of MCuSi4O10 with respect to a diffraction peak intensity of MCuSi2O6 in an X-ray diffraction (XRD) pattern obtained by powder XRD measurement using CuK? rays is 0<??0.50.Type: GrantFiled: February 10, 2016Date of Patent: January 21, 2020Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Jun-ichi Itoh, Ikuhiro Ozawa, Takayoshi Mori
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Publication number: 20190386748Abstract: The optical fiber according to the present disclosure is an optical fiber having a pure silica core which is a step index core through which an LPm1 mode with an effective area of 250 ?m2 or more is propagated by setting a relative refractive index difference to 0.60% or less, considering an effective cutoff condition, and only 2 or more modes or the LPm1 mode are propagated, with the optical fiber as the transmission line.Type: ApplicationFiled: July 4, 2017Publication date: December 19, 2019Applicant: Nippon Telegraph and Telephone CorporationInventors: Takayoshi MORI, Taiji SAKAMOTO, Takashi YAMAMOTO, Kazuhide NAKAJIMA, Masaki WADA, Azusa URUSHIBARA
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Patent number: 10503068Abstract: A method for forming a resist pattern including forming a first contact hole pattern including a hole portion and a hole-unformed portion, which includes alkali developing the exposed positive-type resist film; preparing a structure including the first contact hole pattern and a first layer which covers the first contact hole pattern, which includes forming a first layer by applying a solution including an acid or a thermal acid generator onto a support on which the first contact hole pattern is formed; forming organic solvent-soluble and organic solvent-insoluble regions on the hole-unformed portion, which includes heating the structure; and forming a second contact hole pattern on the hole-unformed portion, which includes developing the heated structure with an organic solvent.Type: GrantFiled: December 1, 2016Date of Patent: December 10, 2019Assignee: TOKYO OHKA KOGYO CO., LTD.Inventors: Takayoshi Mori, Ryoji Watanabe, Yoichi Hori
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Publication number: 20190245317Abstract: An optical amplifier of the present disclosure includes an optical resonator that includes an amplification fiber capable of amplifying signal light having one or more propagation modes and resonates at least one propagation mode of the signal light amplified by the amplification fiber; an excitation light source that outputs excitation light for exciting the amplification fiber; and a multiplexer that multiplexes the signal light and the excitation light, in which the optical resonator includes a gain clamp setting unit which sets gain clamp for at least one propagation mode out of a plurality of propagation modes resonating in the optical resonator.Type: ApplicationFiled: October 25, 2017Publication date: August 8, 2019Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masaki WADA, Shinichi AOZASA, Taiji SAKAMOTO, Takashi YAMAMOTO, Kazuhide NAKAJIMA, Takayoshi MORI
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Publication number: 20190196106Abstract: A differential mode attenuation compensator includes a first multi-mode optical fiber and a third multi-mode optical fiber in which a plurality of propagation modes propagate in a wavelength of a propagating optical signal; and a second multi-mode optical fiber including a core and a clad and arranged with a central axis aligned between the first multi-mode optical fiber and the third multi-mode optical fiber, in which each loss in the plurality of propagation modes is different in the first multi-mode optical fiber and the third multi-mode optical fiber.Type: ApplicationFiled: August 1, 2017Publication date: June 27, 2019Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Masaki WADA, Taiji SAKAMOTO, Takayoshi MORI, Shinichi AOZASA, Takashi YAMAMOTO, Kazuhide NAKAJIMA
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Publication number: 20190187365Abstract: An optical transmission system according to the present disclosure is a mode multiplexed optical transmission system using a multi-mode optical fiber in which a plurality of propagation modes propagate as a transmission line, the optical transmission system including an optical fiber transmission line (83) that includes an optical fiber with two or more propagation modes; and a plurality of mode converters (91) that are configured to generate mode coupling between at least one pair of the propagation modes, in which a variation in an installation interval of the plurality of mode converters (91) is equal to or less than a threshold value determined by the transmission line length (Lt) of the optical fiber transmission line (83).Type: ApplicationFiled: August 25, 2017Publication date: June 20, 2019Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Azusa URUSHIBARA, Takayoshi MORI, Taiji SAKAMOTO, Masaki WADA, Takashi YAMAMOTO, Kazuhide NAKAJIMA