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33 条记录 (耗时 0.015 秒)

    ELECTRONIC COMPENSATION OF CROSS-PHASE MODULATION
    23.
    发明公开
    ELECTRONIC COMPENSATION OF CROSS-PHASE MODULATION 审中-公开
    交叉相位调制的电子补偿

    公开(公告)号：EP2656519A1

    公开(公告)日：2013-10-30

    申请号：EP11851343.1

    申请日：2011-12-19

    申请人： Ofidium Pty Ltd

    发明人： LOWERY, Arthur James ,  DU, Liang Bangyuan

    IPC分类号： H04B10/18

    CPC分类号： H04B10/616 ,  H04B10/2507 ,  H04B10/697 ,  H04B10/6971

    摘要： An optical signal (116) is modulated with a transmitted electrical signal comprising an information-bearing component (122) and a pilot tone (120) having a predetermined frequency. Transmission of the signal results in distortion, including nonlinear optical transmission impairments. A method of receiving the signal includes detecting the optical signal to produce a received electrical signal (X) comprising a distorted variant of the transmitted electrical signal. The pilot tone is extracted from the received electrical signal using a filtering operation (308) having a predetermined characteristic, and a compensation signal determined based upon the extracted pilot tone. The compensation signal is applied to the received electrical signal (X) to produce a compensated signal (Y) having reduced distortion. The predetermined characteristic of the filtering operation (308) is represented by one or more parameters having values selected so as to substantially maximise a measure of quality of the compensated signal.

    MULTICHANNEL NONLINEARITY COMPENSATION IN AN OPTICAL COMMUNICATIONS LINK
    24.
    发明公开
    MULTICHANNEL NONLINEARITY COMPENSATION IN AN OPTICAL COMMUNICATIONS LINK 有权
    多通道不是线性度光通信链路补偿

    公开(公告)号：EP2486679A2

    公开(公告)日：2012-08-15

    申请号：EP10821474.3

    申请日：2010-10-06

    申请人： Ofidium Pty Ltd

    发明人： LOWERY, Arthur James ,  DU, Liang Bangyuan

    IPC分类号： H04B10/18 ,  H04B10/13

    CPC分类号： H04B10/2563 ,  H04B10/2557

    摘要： An apparatus (104) mitigates cross-channel nonlinear distortion of an optical signal (138) carried on one of a plurality of wavelength channels (118) in a wavelength division multiplexed (WDM) transmission system (100). The apparatus includes a first optical receiver (126) which is arranged to detect a measure (134) of aggregate optical power of the plurality of wavelength channels. A nonlinear dispersion compensator includes means (144) for applying a phase modulation to the optical signal in proportion to the measure of aggregate optical power.

    METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS
    26.
    发明授权
    METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS 有权

    公开(公告)号：EP2543150B1

    公开(公告)日：2018-05-30

    申请号：EP11750073.6

    申请日：2011-03-01

    申请人： Ofidium Pty Ltd

    发明人： LOWERY, Arthur James ,  DU, Liang Bangyuan

    IPC分类号： H04B10/61 ,  H04B10/2507

    CPC分类号： H04B10/25073 ,  H04B10/6161 ,  H04B10/6163 ,  H04B10/6971

    摘要： An equalizer (200) for equalization of a signal transmitted via an optical fiber link from a transmitter to a corresponding receiver employs a backpropagation model (300) which comprises one or more sequential segments collectively representing an inverse fiber link. Each sequential segment comprises a linear backpropagation element (304), and a non-linear backpropagation element (306) having an associated compensation bandwidth (312). The equalizer (200) generates a distortion-mitigated signal by computing, for each sequential segment in turn, a first linear compensated signal from a signal input to the segment in accordance with the linear backpropagation element (304), and a non-linear compensated signal from the first linear compensated signal in accordance with the non-linear backpropagation element (306). Computation of the non-linear compensation signal comprises limiting a bandwidth of a compensation signal derived from the first linear compensated signal in accordance with the associated compensation bandwidth (312).