知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

28 条记录 (耗时 0.02 秒)

    Optical waveguide
    1.
    发明授权
    Optical waveguide 有权

    公开(公告)号：US12092870B2

    公开(公告)日：2024-09-17

    申请号：US17782799

    申请日：2019-12-11

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Takashi Go ,  Kenya Suzuki ,  Keita Yamaguchi ,  Ai Yanagihara

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

    CPC分类号： G02B6/125 ,  G02B6/1228 ,  G02B2006/12035 ,  G02B2006/12147

    摘要： In a waveguide having a given Δ, a low-loss waveguide bend is realized while the curvature radius is kept small. In an optical waveguide in which a first waveguide and a second waveguide are connected, a clothoid tapered waveguide bend is inserted between the first waveguide and the second waveguide. In the clothoid tapered waveguide bend, the waveguide width continuously changes from a first waveguide width at a connection point of the first waveguide to a second waveguide width at a connection point of the second waveguide, the curvature radius continuously changes from a first curvature radius at the connection point of the first waveguide to a second curvature radius at the connection point of the second waveguide, the first waveguide width and the second waveguide width are different from each other, and the first curvature radius and the second curvature radius are different from each other.

    Variable wavelength filter
    3.
    发明授权
    Variable wavelength filter 有权

    公开(公告)号：US11112561B2

    公开(公告)日：2021-09-07

    申请号：US16970270

    申请日：2019-03-04

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Kenya Suzuki ,  Takashi Go ,  Osamu Moriwaki ,  Ai Yanagihara ,  Keita Yamaguchi

    IPC分类号： G02B6/12 ,  G02B6/293 ,  G02F1/01

    摘要： Provided is a variable wavelength filter having a wide variable wavelength range. In the variable wavelength filter, a slab waveguide that is a component of an arrayed-waveguide grating has a groove into which a resin is inserted. The groove intersects with a plurality of line segments A joining a place of connection between an input light waveguide and the slab waveguide to places of connection between respective array waveguides and the slab waveguide. The groove is formed such that a total length LA of an intersection of the groove and each of the line segments A monotonously increases or decreases between the adjacent line segments A with a difference in the total length LA between the adjacent line segments A being constant.

    Planar optical waveguide circuit
    4.
    发明授权
    Planar optical waveguide circuit 有权

    公开(公告)号：US11835761B2

    公开(公告)日：2023-12-05

    申请号：US17420371

    申请日：2020-01-08

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Osamu Moriwaki ,  Kenya Suzuki ,  Takashi Go ,  Manabu Oguma ,  Yuichiro Ikuma

    IPC分类号： G02B6/12 ,  G02B6/122

    CPC分类号： G02B6/122 ,  G02B6/12007 ,  G02B2006/12104 ,  G02B2006/12164

    摘要： The invention provides a planar optical waveguide circuit capable of preventing part of the input signal light that has not been combined in the waveguide and propagates as leaked light from interfering with the output signal. A planar optical waveguide circuit having an optical waveguide embedded in a cladding layer includes: a plurality of parallel output optical waveguides configured to emit light from a same end face; a groove having a reflective interface formed at an angle of +45 degrees relative to the output optical waveguides and configured to reflect leaked light propagating in the cladding layer; and a groove having a reflective interface formed at an angle of −45 degrees, the reflective interface formed at an angle of +45 degrees, the output optical waveguide, and the reflective interface formed at −45 degrees being arranged repeatedly in that order.

    Optical Module and Manufacturing Method Thereof
    6.
    发明申请
    Optical Module and Manufacturing Method Thereof 有权

    公开(公告)号：US20220357601A1

    公开(公告)日：2022-11-10

    申请号：US17623507

    申请日：2019-07-05

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Ai Yanagihara ,  Kenya Suzuki ,  Takashi Go ,  Keita Yamaguchi

    IPC分类号： G02F1/01 ,  G02F1/313 ,  G02B6/35 ,  G02F1/136

    摘要： An optical switch is configured by providing a planar lightwave circuit layer on a top surface of a Si substrate. The circuit layer forms, on the top surface of the substrate, an optical waveguide including an underclad layer, an optical waveguide core, and an overclad layer. The optical waveguide is provided to have a structure configuring a Mach-Zehnder interferometer. A heater is provided at a position just above an arm of the core on the top surface of the clad layer, and power supply electric wires are electrically connected to both ends of the heater. In a local portion including an interface between the clad layer and the top surface of the substrate, trench structure portions as concave grooves are provided.

    Wavelength Monitoring Device and Controlling Method Thereof
    7.
    发明申请
    Wavelength Monitoring Device and Controlling Method Thereof 有权

    公开(公告)号：US20220086538A1

    公开(公告)日：2022-03-17

    申请号：US17420639

    申请日：2020-01-08

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Osamu Moriwaki ,  Takashi Saida ,  Kenya Suzuki ,  Takashi Go ,  Manabu Oguma ,  Yuichiro Ikuma

    IPC分类号： H04Q11/00 ,  H04B10/572 ,  G02B6/293

    摘要： A wavelength monitoring apparatus includes a wavelength monitoring circuit. The wavelength monitoring circuit includes: a split circuit that splits an input optical signal into two; an optical delay circuit that applies a delay time difference to the two split optical signals; and a two-input two-output optical multiplexer/demultiplexer circuit that outputs a result of applying multiplexing interference to the optical signals to which the delay time difference has been applied. The wavelength monitoring apparatus further includes photoelectric conversion elements that perform photoelectric conversions on the two optical signals output from the wavelength monitoring circuit so as to output electrical signals. The wavelength monitoring apparatus is configured to obtain the wavelength of the optical signal, by calculating a ratio between two electrical outputs of the photoelectric conversion elements and referring to a correspondence table indicating wavelengths of optical signals input to the wavelength monitoring circuit and ratios between electrical outputs.

    Variable Wavelength Filter
    8.
    发明申请
    Variable Wavelength Filter 有权

    公开(公告)号：US20210141153A1

    公开(公告)日：2021-05-13

    申请号：US16970270

    申请日：2019-03-04

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Kenya Suzuki ,  Takashi Go ,  Osamu Moriwaki ,  Ai Yanagihara ,  Keita Yamaguchi

    IPC分类号： G02B6/12 ,  G02B6/293

    摘要： Provided is a variable wavelength filter having a wide variable wavelength range. In the variable wavelength filter, a slab waveguide that is a component of an arrayed-waveguide grating has a groove into which a resin is inserted. The groove intersects with a plurality of line segments A joining a place of connection between an input light waveguide and the slab waveguide to places of connection between respective array waveguides and the slab waveguide. The groove is formed such that a total length LA of an intersection of the groove and each of the line segments A monotonously increases or decreases between the adjacent line segments A with a difference in the total length LA between the adjacent line segments A being constant.

    Optical module
    10.
    发明授权
    Optical module 有权

    公开(公告)号：US11977315B2

    公开(公告)日：2024-05-07

    申请号：US17297817

    申请日：2019-12-11

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Ai Yanagihara ,  Kenya Suzuki ,  Takashi Go ,  Keita Yamaguchi ,  Yuko Kawajiri

    IPC分类号： G02F1/313 ,  G02B6/12 ,  H01R12/71 ,  H01R13/24

    CPC分类号： G02F1/3136 ,  H01R12/71 ,  H01R13/24 ,  G02F2201/12

    摘要： The positions at which electrode pads are arranged can be made more flexible, and electrical interconnects to be installed can be reduced. In addition, the degree of integration of a chip increases, making it possible to realize a large-scale device (optical switch etc.). In an optical module of the present invention, an interposer (an electrical connection intermediary component with electrode pins attached onto upper and lower faces in an array) is laid over a chip that includes a device configured by using a planar lightwave circuit (PLC) fixed onto a fixing metal plate, and a control substrate for driving the device is laid over the interposer. These components are mechanically fixed by a fixing screw or the like, and the electrode pads of the chip and the control substrate are connected to each other via the interposer.