Patents by Inventor Shinichi Sakamoto

Shinichi Sakamoto 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).

  • Publication number: 20220349806
    Abstract: To provide an adjusting method of a positional relationship between a flow path position and a light irradiation position. The present technology provides a position adjusting method provided with an imaging step of imaging, while moving a flow path through which a microparticle is able to flow in an optical axis direction, the flow path in a plurality of positions in the optical axis direction, a movement step of moving the flow path in the optical axis direction on the basis of a focus index for each of a plurality of images acquired at the imaging step, and an adjustment step of specifying a feature position of the flow path from an image of the flow path in a position after movement at the movement step, and adjusting a positional relationship between the feature position and a reference position in a direction perpendicular to the optical axis direction.
    Type: Application
    Filed: September 11, 2020
    Publication date: November 3, 2022
    Applicant: Sony Group Corporation
    Inventors: Shinichi Kai, Junji Kajihara, Koji Kita, Naohisa Sakamoto, Kazuya Takahashi
  • Publication number: 20220344888
    Abstract: An objective of the present invention is to provide an amplification fiber having a cladding excitation configuration that improves amplification efficiency and an optical amplifier. An amplification fiber (10) according to the present invention is a multi-core amplification fiber having, from one end (E1) to the other end (EE), a plurality of cores (11b) in a cladding (11a), and a total distance from the one end (E1) to the other end (EE) in which rare earth ions are doped differs depending on the types of cores (11b). The cores (11b) are preferably disposed such that the cores of the same type are not adjacent to each other. By arranging the types of the cores in this manner, requirements for inter-core crosstalk can be mitigated since the bands of signal light in the adjacent cores are different. As a result, a density of cladding excitation light can be increased by shortening the inter-core distance, and thus the amplification efficiency can be improved.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 27, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shinichi AOZASA, Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki WADA
  • Publication number: 20220337020
    Abstract: An object is to provide an optical amplifier with a cladding pumped configuration that improves amplification efficiency. The optical amplifier according to the present invention includes a pump light conversion fiber 11 that converts first pump light L1 with a first wavelength propagating in a cladding into second pump light L2 with a second wavelength, an amplification fiber 13 that is connected to the pump light conversion fiber 11 and optically amplifies signal light Ls with the second pump light L2 supplied to the cladding from the pump light conversion fiber 11, and an oscillator 12 that causes the second pump light L2 to be reflected on two reflectors 15 and to reciprocate within the claddings of the pump light conversion fiber 11 and the amplification fiber 13 to cause laser oscillation of the second pump light L2.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 20, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shinichi AOZASA, Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki WADA
  • Publication number: 20220337025
    Abstract: An objective of the present invention is to provide an optical amplifier having a cladding excitation configuration that improves amplification efficiency.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 20, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shinichi AOZASA, Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki WADA
  • Publication number: 20220337016
    Abstract: An objective is to provide an optical amplifier having a core excitation configuration that improves amplification efficiency. An optical amplifier according to the present invention includes an excitation light conversion fiber 11 that absorbs first excitation light L1 propagating in a cladding and having a first wavelength and emits, into a core, spontaneous emission light having a second wavelength, an oscillator 12 for causing the spontaneous emission light to be reflected on two reflectors 15 to reciprocate the light within the core of the excitation light conversion fiber 11 and laser-oscillating second excitation light L2 having the second wavelength, and an amplification fiber 13 that is connected to the excitation light conversion fiber 11 and amplifies signal light with the second excitation light L2 supplied from the excitation light conversion fiber 11 to the core.
    Type: Application
    Filed: September 26, 2019
    Publication date: October 20, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shinichi AOZASA, Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki WADA
  • Patent number: 11451006
    Abstract: A fiber laser device includes: an amplifying fiber; a delivery fiber in which laser light that has been outputted from the amplifying fiber is guided; and a Raman filter that reflects part of Raman scattered light that is generated by stimulated Raman scattering caused to the laser light.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: September 20, 2022
    Assignee: Fujikura Ltd.
    Inventor: Shinichi Sakamoto
  • Patent number: 11436546
    Abstract: According to one embodiment, an operation planning system includes a demand information database and a plurality of planning units. The demand information database stores demand data including an overall output required for a plurality of operation units for a planning period in an operation plan. The plurality of planning units adjusts output settings of the plurality of operation units. Any of the planning units selects a combination of operation units which provide the overall output required for the planning period, and based on operation costs depending on the outputs of the operation units, a process is repeated to generate the operation plan, the process including: selection of the operation unit belonging to the combination of operation units; and adjustment of the output setting for the selected operation unit by the planning unit paired with the selected operation unit.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: September 6, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Topon Paul, Shuuichiro Imahara, Shinichi Nagano, Yoshiyuki Sakamoto
  • Patent number: 11404842
    Abstract: A laser device includes: a light source including laser diodes; a processor that holds: a maximum current value of a driving current applied to the laser diodes, and a maximum power value of a power of light emitted from the light source; and a memory, coupled to the processor, that stores a relationship between a magnitude of the driving current, a magnitude of the power of the light, and a degree of deterioration of the light source. The processor further refers to the memory and estimates the degree of deterioration from the maximum current value and the maximum power value.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: August 2, 2022
    Assignee: FUJIKURA LTD.
    Inventor: Shinichi Sakamoto
  • Publication number: 20220214496
    Abstract: An object is to provide a multi-core configuration for acquiring a random mode coupling in a case of an arbitrary core refractive index. A multi-core optical fiber according to the present invention is an optical fiber in which two or more core regions are arranged in a clad region having a refractive index at a minimum core interval ? smaller than a refractive index of the cores, a configuration of the cores is that including one propagation mode, and the core configuration and the core interval are adjusted so that an inter-mode coupling coefficient between adjacent cores is within a range from 0.73 to 120 m?1.
    Type: Application
    Filed: April 6, 2020
    Publication date: July 7, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki WADA, Shinichi AOZASA, Takashi YAMAMOTO
  • Publication number: 20220203582
    Abstract: A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.
    Type: Application
    Filed: March 21, 2022
    Publication date: June 30, 2022
    Inventors: Motomi TAKAHASHI, Tomohiro KAJIYAMA, Teruaki TANAKA, Shinichi SAKAMOTO, Juichi OKI, Mitsugu KAWARAI, Tsutomu OTSUKA
  • Patent number: 11366009
    Abstract: A light detection device includes: a first optical fiber including a first core surrounded by a first cladding; a second optical fiber including a second core surrounded by a second cladding; a first cladding mode stripper provided outside the first cladding; a first light detector; and a second light detector. The second core has a diameter larger than a diameter of the first core and is connected to the first core. In a longitudinal direction of the first optical fiber, the first light detector is disposed on one side of the first cladding mode stripper and the second light detector is disposed on another side of the first cladding mode stripper.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 21, 2022
    Assignee: FUJIKURA LTD.
    Inventor: Shinichi Sakamoto
  • Patent number: 11312045
    Abstract: A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: April 26, 2022
    Assignee: SUMIDA CORPORATION
    Inventors: Motomi Takahashi, Tomohiro Kajiyama, Teruaki Tanaka, Shinichi Sakamoto, Juichi Oki, Mitsugu Kawarai, Tsutomu Otsuka
  • Publication number: 20220123515
    Abstract: A laser device includes at least one light source; a delivery fiber configured to propagate laser light launched from the light source; a monitor fiber optically coupled to the delivery fiber and configured to propagate a part of the light propagating in a direction opposite to a propagation direction of the laser light in the delivery fiber, and a light receiving unit configured to receive the light propagated by the monitor fiber. The light receiving unit is configured to detect first light included in a wavelength band of visible light.
    Type: Application
    Filed: February 27, 2020
    Publication date: April 21, 2022
    Applicant: Fujikura Ltd.
    Inventors: Takashi Hasunuma, Shinichi Sakamoto, Yasuto Chiba, Wataru Kiyoyama, Yutaka Yamaguchi
  • Publication number: 20220091324
    Abstract: A laser device includes: a laser unit that outputs laser light; an output end that launches the laser light; a first fusion splice portion; and a second fusion splice portion. In each of the first fusion splice portion and the second fusion splice portion, two multi-mode fibers are fusion-spliced. Each of the two multi-mode fibers include a core through which the laser light propagates and a cladding that surrounds the core. The first fusion splice portion is disposed closer to the laser unit than is the second fusion splice portion. At least a part of the core in the first fusion splice portion contains a dopant that is the same type as a dopant contained in the cladding in the first fusion splice portion for decreasing a refractive index.
    Type: Application
    Filed: March 11, 2020
    Publication date: March 24, 2022
    Applicant: Fujikura Ltd.
    Inventors: Yutaka Yamaguchi, Shinichi Sakamoto, Yasuto Chiba, Tatsuya Kishi
  • Publication number: 20220094132
    Abstract: A laser device includes at least one light source; a delivery fiber that is configured to propagate of laser light emitted from the light source; and a first light detection unit and a second light detection unit configured to detect a part of light propagating in a direction opposite to a propagation direction of the laser light through the delivery fiber. The first light detection unit detects first light included in a wavelength band of visible light. The second light detection unit detects second light included in a wavelength band of near-infrared light.
    Type: Application
    Filed: February 27, 2020
    Publication date: March 24, 2022
    Applicant: Fujikura Ltd.
    Inventors: Shinichi Sakamoto, Yasuto Chiba, Wataru Kiyoyama, Yutaka Yamaguchi, Takashi Hasunuma
  • Publication number: 20220085565
    Abstract: A fiber laser device includes a pumping light source, an amplifying fiber, an input side fiber fusion-spliced on an input side of the amplifying fiber and formed with a HR-FBG, an output side fiber fusion-spliced on an output side of the amplifying fiber and formed with an OC-FBG having a reflectivity smaller than that of the HR-FBG, an output end, and a mode filter, wherein the input side fiber or an intermediate fiber disposed between the amplifying fiber and the input side fiber is fusion-spliced with the amplifying fiber via a fusion splice portion, and at least a portion of the mode filter is disposed in a region between the fusion splice portion and a position separated from the fusion splice portion by a coherence length of beating caused by mode interference of signal light propagating in the amplifying fiber.
    Type: Application
    Filed: February 21, 2020
    Publication date: March 17, 2022
    Applicant: Fujikura Ltd.
    Inventors: Yasuo Nakanishi, Yasuhiro Mashiko, Shinichi Sakamoto, Kensuke Shima
  • Publication number: 20220013285
    Abstract: An inductor includes an air-core coil assembled with a T-shaped core and a composite magnetic material and resin mixture embedding the T-shaped core and the air-core coil. The air-core coil has: a coil member having a coil axis and first and second sides opposite to each other; and first and second leads that are integrally connected to the coil member. The first and second leads respectively have: first and second bent members at the first side; first and second ends at the second side; and first and second bottom extensions respectively connected between the first and second bent members and the first and second ends. The first and second bent members extend in a first direction parallel to the coil axis, the first and second ends extend in a second direction parallel to the coil axis, and the first and second bottom extensions extend perpendicular to the coil axis.
    Type: Application
    Filed: September 24, 2021
    Publication date: January 13, 2022
    Inventors: Shinichi SAKAMOTO, Douglas James MALCOLM
  • Publication number: 20210343469
    Abstract: An electronic component comprises: a magnetic core having a flat base and a core, the flat base having a top, a bottom, and first and second opposite sides, the core is on the top; a winding having an edgewise coil including a wound flat wire and the core, the winding having two non-wound flat wires extending therefrom; and a magnetic exterior body covering the core and the edgewise coil. The two non-wound flat wires extend along the top, the first side, the bottom and then the second side, and the two non-wound flat wires are non-adhesively positioned around the flat base. The two non-wound flat wires on the bottom are externally exposed electrodes. The second side inclines towards the core. The two ends of the two non-wound flat wires are embedded into the magnetic exterior body to fix the two non-wound flat wires to the magnetic exterior body.
    Type: Application
    Filed: July 13, 2021
    Publication date: November 4, 2021
    Inventors: Shinichi SAKAMOTO, Zhigang CHENG, Fernando CHAN MOCK, Mitsugu KAWARAI
  • Patent number: 11158454
    Abstract: A method for manufacturing an electronic component is provided. The method includes: placing an air-core coil in a mold; placing a mixture of an Fe—Si—Cr alloy, a thermosetting resin, and a solvent into the mold so as to embed the air-core coil in the mixture; after placing the mixture, applying pressure to the placed mixture so that a shape of the placed mixture conforms to the air-core coil and the mold; and after applying the pressure, heating the mixture at a predetermined temperature for a predetermined time so that the placed mixture is hardened.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: October 26, 2021
    Inventors: Shinichi Sakamoto, Douglas James Malcolm
  • Publication number: 20210296842
    Abstract: The present invention provides a chirped fiber grating element in which an amount of heat generated in the vicinity of an incident end surface is small. The chirped fiber grating element is configured such that: a pitch ?i of a grating (11a) increases with increasing distance from one end surface (1A); and a refractive index difference ?ni of the grating (11a) increases with increasing distance from the end surface (1A).
    Type: Application
    Filed: August 24, 2017
    Publication date: September 23, 2021
    Applicant: FUJIKURA LTD.
    Inventor: Shinichi Sakamoto