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    OPTICAL TRANSMISSION METHOD AND APPARATUS
    131.
    发明公开
    OPTICAL TRANSMISSION METHOD AND APPARATUS 审中-公开

    公开(公告)号：EP4443770A1

    公开(公告)日：2024-10-09

    申请号：EP22914374.8

    申请日：2022-12-19

    申请人： Huawei Technologies Co., Ltd.

    发明人： XIAO, Kang ,  LOU, Yannian ,  WEI, Juan ,  ZHENG, Dongsheng

    IPC分类号： H04B10/61

    摘要： This application provides an optical transmission method and apparatus, and relates to the communication field, to reduce or even eliminate phase noise. A first optical transmission apparatus includes a first circulator and a first receiving module. The first receiving module is connected to the first circulator. The first circulator is configured to receive a second unmodulated optical signal from a second optical transmission apparatus. The first receiving module is configured to receive a second modulated optical signal from the second optical transmission apparatus, and receive the second unmodulated optical signal from the first circulator. The second modulated optical signal is obtained by modulating a first unmodulated optical signal, the second unmodulated optical signal is used to perform coherence detection on the second modulated optical signal, the first unmodulated optical signal and the second unmodulated optical signal are obtained by separating a third unmodulated optical signal, and the third unmodulated optical signal is an optical signal provided by the first optical transmission apparatus to the second optical transmission apparatus.

    METHODS AND APPARATUS FOR DETECTING AND COMPENSATING BANDWIDTH LIMITATION AND MODULATION NONLINEARITY OF A COHERENT OPTICAL TRANSPONDER
    138.
    发明公开
    METHODS AND APPARATUS FOR DETECTING AND COMPENSATING BANDWIDTH LIMITATION AND MODULATION NONLINEARITY OF A COHERENT OPTICAL TRANSPONDER 审中-公开

    公开(公告)号：EP4283887A3

    公开(公告)日：2024-02-21

    申请号：EP23195743.2

    申请日：2019-03-27

    申请人： Juniper Networks, Inc.

    发明人： WANG, Qiang ,  YUE, Yang

    IPC分类号： H04B10/61 ,  H04B10/50 ,  H04B10/532

    摘要： In some embodiments, an apparatus includes a memory and a processor operatively coupled to the memory. The processor is configured to send a stimulus signal at a frequency that corresponds to a first frequency value to a tributary channel of a coherent optical transponder. The processor is configured to adjust an amplitude of the stimulus signal and receive a first plurality of output optical power values. The processor is configured to adjust the frequency of the stimulus signal and receive a second plurality of output optical power values. The processor is configured to determine a bandwidth limitation and a modulation nonlinearity, and then send a first signal to a first filter to reduce the bandwidth limitation and a second signal to a second filter to reduce the modulation nonlinearity.