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    OADM NODE AND METHOD IN WDM SYSTEM
    2.
    发明申请
    OADM NODE AND METHOD IN WDM SYSTEM 审中-公开

    公开(公告)号：US20180198550A1

    公开(公告)日：2018-07-12

    申请号：US15914716

    申请日：2018-03-07

    申请人： Huawei Technologies Co., Ltd.

    发明人： Ning Deng ,  Shiyi Cao ,  Jun Luo

    IPC分类号： H04J14/02 ,  H04Q11/00 ,  H04B10/2581 ,  H04B10/275

    CPC分类号： H04J14/0205 ,  H04B10/2581 ,  H04B10/275 ,  H04J14/0212 ,  H04J14/0213 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0009

    摘要： A node in a wavelength division multiplexing (WDM) system is provided, which includes: a colorless optical transmitter, a first arrayed waveguide grating, a first waveband filter configured to divide an input optical signal into M sub-signals of different wavebands and output to a first optical switch, and a first optical coupler/a first optical combiner. A transmit end of the colorless optical transmitter is coupled to an input end of the first waveband filter via the first arrayed waveguide grating. The first optical switch is configured to connect an output end of the first waveband filter to an input end of the first optical coupler/the first optical combiner according to a control signal. An output end of the first optical coupler/the first optical combiner is coupled to an optical transmission path.

    Colorless, directionless and contentionless network node
    4.
    发明授权
    Colorless, directionless and contentionless network node 有权

    公开(公告)号：US09954636B2

    公开(公告)日：2018-04-24

    申请号：US14953106

    申请日：2015-11-27

    申请人： NISTICA, INC.

    发明人： Jefferson L. Wagener

    IPC分类号： H04B10/00 ,  H04J14/02 ,  H04Q11/00

    CPC分类号： H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04Q11/0005 ,  H04Q2011/0016 ,  H04Q2011/0026

    摘要： A node that is colorless, directionless and contentionless includes an add/drop terminal having an add wavelength selective switch (WSS) and a drop WSS. The add and drop WSSs are each configured to selectively direct any subset of the wavelength components received at any of its inputs to a different one of its optical outputs, provided that the wavelength components of optical beams received by any two of the inputs cannot be simultaneously directed to a common one of the outputs. A plurality of transponder ports are each optically coupled to a different output of the drop WSS and a different input of the add WSS.

    Periodic superchannel carrier arrangement for optical communication systems
    5.
    发明授权
    Periodic superchannel carrier arrangement for optical communication systems 有权

    公开(公告)号：US09900124B2

    公开(公告)日：2018-02-20

    申请号：US13078895

    申请日：2011-04-01

    申请人： John D. McNicol ,  Michael Francis Van Leeuwen

    发明人： John D. McNicol ,  Michael Francis Van Leeuwen

    IPC分类号： H04J14/02 ,  H04J14/06

    CPC分类号： H04J14/06 ,  H04J14/02 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0256

    摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit node of an optical communication system, is processed and then output to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data, forming a plurality of corresponding carriers. The plurality of wavelengths used for the plurality of carriers are spectrally spaced apart by a common, periodic fixed spacing. The plurality of carriers are optically combined with a fixed spacing combiner to form a superchannel. A plurality of superchannels are generated and then multiplexed together onto an optical communication path and transmitted to a receive node. Each superchannel includes a plurality of carriers, each spectrally separated by the same fixed spacing. The plurality of superchannels are spectrally separated by an amount corresponding to the fixed spacing of the plurality of carriers. At the receive node, the superchannels are optically demultiplexed, and the plurality of carriers of a respective superchannel are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. The resultant signals are then processed electronically to separate the individual carriers and output data corresponding to the input data.

    Locally powered optical communication network
    6.
    发明授权
    Locally powered optical communication network 有权

    公开(公告)号：US09893834B2

    公开(公告)日：2018-02-13

    申请号：US15378478

    申请日：2016-12-14

    申请人： Google Inc.

    发明人： Valey Kamalov ,  Joseph Freeland ,  Andrew Metcalf

    IPC分类号： H04B10/00 ,  H04J14/02 ,  H04B10/291 ,  H04B10/80

    CPC分类号： H04J14/0213 ,  H04B10/2575 ,  H04B10/291 ,  H04B10/2916 ,  H04B10/503 ,  H04B10/807 ,  H04B10/808

    摘要： A branching unit for an optical system includes an optical add-drop multiplexer, which includes first and second filters. The first filter is configured to filter a first band of wavelengths of a communication spectrum for a first communication segment. The second filter is configured to filter a second band of wavelengths of the communication spectrum for a second communication segment. The second band of wavelengths overlaps the first band of wavelengths in an overlap band of wavelengths with no guard band between the first band of wavelengths and the second band of wavelengths. Moreover, the overlap band of wavelengths has a variable size. The first band of wavelengths includes a first fraction of the overlap band of wavelengths for the first communication segment and the second band of wavelengths includes a remaining fraction of the overlap band of wavelengths for the second communication segment.

    Symmetric optical multiplexing node
    8.
    发明授权
    Symmetric optical multiplexing node 有权

    公开(公告)号：US09641275B2

    公开(公告)日：2017-05-02

    申请号：US13163290

    申请日：2011-06-17

    申请人： Massimo Manna

    发明人： Massimo Manna

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0215 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0217

    摘要： Techniques for communications using optical fiber are disclosed. An optical add/drop multiplexer (OADM) node includes an interface to a first fiber pair connecting a first trunk station and a second trunk station. The OADM node further includes an interface to a second fiber pair connecting the first trunk station and the second trunk station with a branch station. The OADM node includes a plurality of filters configured to provide connectivity between the first trunk station, the second trunk station and the branch station. Other embodiments are described and claimed.