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公开(公告)号：US20240329337A1
公开(公告)日：2024-10-03
申请号：US18618562
申请日：2024-03-27
Applicant: TDK CORPORATION
Inventor： Yasuhiro TAKAGI , Hiroki HARA , Atsushi SHIMURA
CPC classification number: G02B6/4214 , G02F1/035 , G02F1/212 , G02F2201/04
Abstract: A Y-branch type optical coupler includes an optical coupling part to which a plurality of input-side optical waveguides through which the plurality of lights propagate, and one output-side optical waveguide are connected, wherein the optical coupling part has an isosceles trapezoid shape of which the width is narrowed in a taper shape at a first angle α from the input side to the output side (a traveling direction of light) in a plan view, at least two input-side optical waveguides among the plurality of input-side optical waveguides are disposed symmetrically with respect to a symmetry axis of the isosceles trapezoid, are inclined at a second angle θ that is different from the first angle α, and are connected to a lower bottom portion of the isosceles trapezoid, and the difference between the first angle and the second angle is 0.9° or more and 14.8° or less.
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公开(公告)号：US20240126015A1
公开(公告)日：2024-04-18
申请号：US18377602
申请日：2023-10-06
Applicant: TDK CORPORATION
Inventor： Hajime UTSUNOMIYA , Yasuhiro TAKAGI , Hiroki HARA , Atsushi SHIMURA , Jiro YOSHINARI , Takashi KIKUKAWA , Tsuyoshi KOMAKI , Hideaki FUKUZAWA
IPC: G02B6/293
CPC classification number: G02B6/29344
Abstract: This optical coupler for coupling a plurality of visible light beams having different wavelengths includes: a substrate made of a material different from lithium niobate; and an optical coupling function layer formed on a main surface of the substrate. The optical coupling function layer includes: two multimode-interference-type optical coupling parts; optical-input-side waveguides and an optical-output-side waveguide connected to one multimode-interference-type optical coupling part, and optical-input-side waveguides and an optical-output-side waveguide connected to the other multimode-interference-type optical coupling part. The multimode-interference-type optical coupling parts, the optical-input-side waveguides, and the optical-output-side waveguides are made of a lithium niobate film.
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公开(公告)号：US20190245254A1
公开(公告)日：2019-08-08
申请号：US16340471
申请日：2017-10-23
Applicant: TDK CORPORATION
Inventor： Takekazu YAMANE , Tetsuya SHIBATA , Tsuyoshi SUZUKI , Junichiro URABE , Atsushi SHIMURA
IPC: H01P1/218
Abstract: A magnetoresistive effect device includes an input port, an input-side signal line, an MR unit including a magnetoresistive effect element and a magnetic-field generating signal line, and an output unit including a magnetoresistive effect element, an output-side signal line, and an output port. The magnetoresistive effect device further includes a DC application terminal. The magnetoresistive effect element is connected to the output port via the output-side signal line in the output unit. The input-side signal line is arranged so that a high frequency magnetic field generated from the input-side signal line is applied to the magnetoresistive effect element in the MR unit. In the MR unit, the magnetoresistive effect element is connected to the magnetic-field generating signal line. The magnetic-field generating signal line is arranged so that a high-frequency magnetic field generated from magnetic-field generating signal line is applied to the magnetoresistive effect element in the output unit.
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公开(公告)号：US20180316077A1
公开(公告)日：2018-11-01
申请号：US15962587
申请日：2018-04-25
Applicant: TDK CORPORATION
Inventor： Takekazu YAMANE , Junichiro URABE , Tsuyoshi SUZUKI , Atsushi SHIMURA
Abstract: A magnetoresistance effect device includes a first port, a second port, a magnetoresistance effect element, a first signal line that is connected to the first port and applies a high-frequency magnetic field to the magnetoresistance effect element, a second signal line that connects the second port to the magnetoresistance effect element, and a direct current application terminal that is connected to a power source configured to apply a direct current or a direct voltage in a lamination direction of the magnetoresistance effect element. The first signal line includes a plurality of high-frequency magnetic field application areas capable of applying a high-frequency magnetic field to the magnetoresistance effect element, and the plurality of high-frequency magnetic field application areas in the first signal line are disposed at positions at which high-frequency magnetic fields generated in the high-frequency magnetic field application areas reinforce each other in the magnetoresistance effect element.
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Patent Agency Ranking
公开(公告)号：US20180309046A1
公开(公告)日：2018-10-25
申请号：US15764826
申请日：2016-06-02
Applicant: TDK CORPORATION
Inventor： Junichiro URABE , Tetsuya SHIBATA , Atsushi SHIMURA , Takekazu YAMANE , Tsuyoshi SUZUKI
CPC classification number: H01L43/08 , B82Y25/00 , H01L29/82 , H01L43/02 , H01L43/10 , H01P1/215 , H03B15/006
Abstract: Magnetoresistive effect device including magnetoresistive effect element which high-frequency filter can be realized is provided. Magnetoresistive effect device includes: at least one magnetoresistive effect element including magnetization fixed, spacer, and magnetization free layer wherein magnetization direction is changeable; first and second ports; signal line; and direct-current input terminal. First and second ports are connected to each other via signal line. Magnetoresistive effect element is connected to signal line and is to be connected to ground in parallel to second port. Direct-current input terminal is connected to signal line. Closed circuit including magnetoresistive effect element, signal line, ground, and direct-current input terminal is to be formed. Magnetoresistive effect element is arranged wherein direct current input from direct-current input terminal flows through magnetoresistive effect element in direction from magnetization fixed layer to magnetization free layer.
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公开(公告)号：US20240295701A1
公开(公告)日：2024-09-05
申请号：US18589472
申请日：2024-02-28
Applicant: TDK Corporation
Inventor： Yasuhiro TAKAGI , Hiroki HARA , Atsushi SHIMURA
CPC classification number: G02B6/29344 , G02B6/4215 , G02B26/105
Abstract: An optical coupler of the present invention is an optical coupler that couples laser lights of three different wavelengths, and includes a two-stage MMI type optical coupler in which a first MMI type optical coupling part and a second MMI type optical coupling part are connected from the input side, and the width of the first MMI type optical coupling part is wider than the width of the second MMI type optical coupling part.
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公开(公告)号：US20230228941A1
公开(公告)日：2023-07-20
申请号：US17924522
申请日：2021-08-19
Applicant: TDK CORPORATION
Inventor： Hiroki HARA , Takashi KIKUKAWA , Atsushi SHIMURA
IPC: G02B6/125
CPC classification number: G02B6/125 , G02B2006/12097
Abstract: An optical circuit element capable of preventing stray light propagated through a part including a substrate of the optical circuit element from being emitted to the outside is provided. The optical circuit element has a substrate, an optical waveguide layer that is formed on one surface of the substrate, and a protective layer that is overlaid on the optical waveguide layer. The optical waveguide layer has an optical waveguide configured for light to be propagated therethrough. A groove portion, which reaches to a position deeper than the one surface from a surface of the protective layer toward the substrate, is formed. The optical circuit element further includes a light absorption layer that covers at least a bottom surface and a side surface of the groove portion.
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公开(公告)号：US20220326555A1
公开(公告)日：2022-10-13
申请号：US17707675
申请日：2022-03-29
Applicant: TDK CORPORATION
Inventor： Hiroshi TAKE , Kenji NAGASE , Anthony Reymund Melad BINARAO , Cheng Bu HENG , Atsushi SHIMURA
Abstract: The optical device includes a substrate and an optical waveguide formed on the substrate, a protrusion portion is formed on the substrate adjacent to the optical waveguide. Accordingly, an optical device which can achieve further suppression of the light propagation loss and higher reliability is provided
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公开(公告)号：US20190237663A1
公开(公告)日：2019-08-01
申请号：US16262513
申请日：2019-01-30
Applicant: TDK CORPORATION
Inventor： Tsuyoshi SUZUKI , Shinji HARA , Atsushi SHIMURA
CPC classification number: H01L43/08 , H01L27/22 , H03B15/006 , H03H1/0007 , H03H2001/0057 , H03H2001/0085
Abstract: The magnetoresistance effect device includes first and second ports, a first circuit unit and a second circuit unit connected between the first port and the second port, a shared reference electric potential terminal or a first reference electric potential terminal and a second reference electric potential terminal, and a shared DC application terminal or a first DC application terminal and a second DC application terminal, the first circuit unit includes a first magnetoresistance effect element, the second circuit unit includes a second magnetoresistance effect element and a first conductor separated from the second magnetoresistance effect element with an insulating body therebetween and a first end portion of the first conductor is connected to an input side of high frequency current such that high frequency magnetic field generated by the high frequency current flowing through the first conductor is applied to the magnetization free layer of the second magnetoresistance effect element.
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