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    Optical Signal Processing Apparatus
    3.
    发明申请
    Optical Signal Processing Apparatus 有权

    公开(公告)号：US20220091473A1

    公开(公告)日：2022-03-24

    申请号：US17419489

    申请日：2020-01-07

    申请人： Nippon Telegraph and Telephone Corporation

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

    IPC分类号： G02F1/313

    摘要： To provide an optical signal processing device capable of reducing the crosstalk while narrowing the space between switch elements for downsizing, the optical signal processing device includes a plurality of input optical waveguides, a plurality of output optical waveguides, a plurality of optical waveguide elements arranged between the plurality of input optical waveguides and the plurality of output optical waveguides, and a connection optical waveguide. The connection optical waveguide positioned closely to the optical waveguide element is differentiated in propagation constant from the optical waveguide configuring the closely arranged optical waveguide element. The connection optical waveguide positioned closely to the optical waveguide element is a connection optical waveguide having one end or both ends connected to the optical waveguide element, or a connection optical waveguide having both ends not connected to the optical waveguide elements.

    Optical and electronic integrated switch and optical network system
    6.
    发明授权
    Optical and electronic integrated switch and optical network system 有权

    公开(公告)号：US11881897B2

    公开(公告)日：2024-01-23

    申请号：US17801130

    申请日：2020-02-26

    申请人： Nippon Telegraph and Telephone Corporation

    发明人： Hideki Nishizawa ,  Seiki Kuwabara ,  Seiji Okamoto ,  Shuto Yamamoto ,  Tetsuro Inui ,  Shunichi Soma ,  Kenya Suzuki ,  Osamu Moriwaki ,  Keita Yamaguchi

    IPC分类号： H04B10/61 ,  H04B10/2575 ,  H04L45/00

    CPC分类号： H04B10/61 ,  H04B10/25759 ,  H04L45/56

    摘要： A photo-electron fusion switch that can perform optical communications without any trouble, even when nodes of a communication source and a communication partner that are large in transmission capacity are connected, and makes it possible to realize a concentrated arrangement of devices having similar functions and reduce the communication processing time is connected to communication source's information processing devices and communication partner's information processing devices and information processing devices that are each different in transmission speed so as to configure an optical network system. The photo-electron fusion switch includes a network processor of an electronic circuit for controlling packet switch functions, a plurality of optical transmitter/receivers that can support coherent communications and has a photoelectric conversion function capable of transmitting and receiving optical signals different in transmission speed, an optical line switching device, and a plurality of multiplexing/separators. Each multiplexing/separator simultaneously transmits and receives respective optical signals different in transmission speed to and from the nodes via optical waveguides.

    Variable wavelength filter
    8.
    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.