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    Optical circuit
    3.
    发明授权
    Optical circuit 有权

    公开(公告)号：US12174422B2

    公开(公告)日：2024-12-24

    申请号：US17637033

    申请日：2019-08-23

    Applicant: Nippon Telegraph and Telephone Corporation

    Inventor： Makoto Abe ,  Atsushi Aratake

    IPC: G02B6/125 ,  G02B6/12 ,  G02B6/122

    Abstract: A second core includes a first portion, a second portion, and a bending portion. In the first portion, a wave-guiding direction is a first direction parallel to a plane of a first substrate. In the second portion, a wave-guiding direction is a second direction that is at a predetermined angle with respect to the plane of the first substrate. For example, in the second portion, the wave-guiding direction is the second direction that is at substantially 90 degrees with respect to the plane of the first substrate. The bending portion connects the first portion and the second portion. A relative refractive index difference between the second core and a cladding of the second optical waveguide preferably has a value such that the propagation loss in the bending portion is equal to or smaller than 0.1 dB.

    Analysis device and analysis method
    5.
    发明授权
    Analysis device and analysis method 有权

    公开(公告)号：US12050147B2

    公开(公告)日：2024-07-30

    申请号：US17421488

    申请日：2020-02-07

    Applicant: Nippon Telegraph and Telephone Corporation

    Inventor： Jun Endo ,  Atsushi Aratake

    IPC: G01M11/02 ,  G01N27/83 ,  G02B6/122 ,  G02B6/42 ,  G06F17/13

    CPC classification number: G01M11/025 ,  G01N27/83 ,  G02B6/122 ,  G02B6/4292 ,  G06F17/13

    Abstract: An analysis apparatus includes a setting device configured to set information on a structure of an optical connection structure, a solution device configured to solve a partial differential equation having, as an unknown, an electromagnetic field distributed in the optical connection structure based on the information on the structure of the optical connection structure to determine a distribution of the electromagnetic field, a data extraction device configured to extract, from the distribution of the electromagnetic field determined by the solution device, a mode distribution in a plane at a predetermined position of the optical connection structure and a time response of an electromagnetic field at a predetermined position of the optical connection structure, and a characteristics analysis device configured to analyze optical characteristics of the optical connection structure based on the mode distribution and the time response of the electromagnetic field extracted by the data extraction device.

    Optical connection structure
    6.
    发明授权
    Optical connection structure 有权

    公开(公告)号：US11960121B2

    公开(公告)日：2024-04-16

    申请号：US17293705

    申请日：2019-11-28

    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    Inventor： Jun Endo ,  Kota Shikama ,  Atsushi Aratake

    IPC: G02B6/30

    CPC classification number: G02B6/30

    Abstract: An embodiment optical body is provided in a propagation path of light between a Si waveguide and an optical fiber. The optical body changes a course of some of radiation mode light, which is emitted from the Si waveguide and propagates in a direction away from an optical axis thereof, to obtain waveguide mode light passing through itself. Thus, the amount of waveguide mode light incident on the optical fiber increases, and the coupling efficiency between the Si waveguide and the optical fiber is improved.

    Optical connector and optical connecting structure
    7.
    发明授权
    Optical connector and optical connecting structure 有权

    公开(公告)号：US11789215B2

    公开(公告)日：2023-10-17

    申请号：US17620553

    申请日：2019-06-25

    Applicant: Nippon Telegraph and Telephone Corporation

    Inventor： Norio Sato ,  Satoshi Shigematsu ,  Hiroshi Ishikawa ,  Kota Shikama ,  Atsushi Aratake

    IPC: G02B6/38 ,  G02B6/42 ,  G02B6/02 ,  G02B6/26

    CPC classification number: G02B6/3886 ,  G02B6/4228 ,  G02B6/02052 ,  G02B6/262

    Abstract: An embodiment optical connector includes a fiber having a core through which light is guided and a magnet attached to one end of the fiber, and the magnet has an opening that exposes at least the end face of the core. An embodiment optical connection structure includes a first optical connector and a second optical connector, each including a fiber having a core through which light is guided and a magnet attached to one end of the fiber, wherein the magnets are magnetized so as to exert attraction on each other, and when the first optical connector and the second optical connector are mechanically connected by magnetic forces, the core of the first optical connector and the core of the second optical connector are optically connected through the opening of the magnet of the first optical connector and the opening of the magnet of the second optical connector.

    Optical Connecting Structure
    9.
    发明申请
    Optical Connecting Structure 有权

    公开(公告)号：US20220057580A1

    公开(公告)日：2022-02-24

    申请号：US17432266

    申请日：2020-04-02

    Applicant: Nippon Telegraph and Telephone Corporation

    Inventor： Jun Endo ,  Kota Shikama ,  Atsushi Aratake

    IPC: G02B6/32 ,  B29D11/00

    Abstract: An optical connection structure 1 includes a waveguide substrate; a Si waveguide formed on one surface of the waveguide substrate and having a first end surface; an optical fiber having a second end surface facing the first end surface; a terrace section extending further toward the optical fiber side from an end portion on the optical fiber side of the waveguide substrate; and a lens disposed on the terrace section, and arranged on an optical axis connecting the first end surface and the second end surface.

    Optical Connection Component and Optical Connection Structure
    10.
    发明申请
    Optical Connection Component and Optical Connection Structure 有权

    公开(公告)号：US20210382231A1

    公开(公告)日：2021-12-09

    申请号：US17287094

    申请日：2019-11-12

    Applicant: Nippon Telegraph and Telephone Corporation

    Inventor： Kota Shikama ,  Atsushi Aratake

    IPC: G02B6/125

    Abstract: Provided is an optical connection component that is constituted of a plate-shaped substrate configured to transmit light to be used, and a resin optical waveguide. The resin optical waveguide is constituted of a resin core formed with a resin through which light to be used passes. For example, the resin core is formed with a light-cured resin. The resin optical waveguide uses air surrounding the resin core as a cladding. The resin core has a folded back structure in which the resin core once separates from the surface of the substrate and then returns to the surface of the substrate, and is connected to each of a first input/output end and a second input/output end of the substrate.

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