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1. 发明授权

EP2656519B1 ELECTRONIC COMPENSATION OF CROSS-PHASE MODULATION 有权
公开(公告)号：EP2656519B1
公开(公告)日：2018-08-01
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： H04B10/69 , H04B10/2507
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 maximize a measure of quality of the compensated signal.

2. 发明授权

EP2486679B1 MULTICHANNEL NONLINEARITY COMPENSATION IN AN OPTICAL COMMUNICATIONS LINK 有权
标题翻译：一种光通信链路中的多信道非线性补偿
公开(公告)号：EP2486679B1
公开(公告)日：2017-09-06
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： H04B10/2557 , H04B10/2563
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.
摘要翻译：一种装置（104）减轻在波分复用（WDM）传输系统（100）中的多个波长信道（118）中的一个上承载的光信号（138）的交叉信道非线性失真。该装置包括第一光接收器（126），该第一光接收器被安排来检测多个波长信道的聚合光功率的测量值（134）。非线性色散补偿器包括用于与光信号的聚集光功率的测量成比例地对光信号施加相位调制的装置（144）。

3. 发明公开

EP2115907A1 NON-LINEARITY COMPENSATION IN AN OPTICAL TRANSMISSION 有权
标题翻译：非线性补偿的光传输
公开(公告)号：EP2115907A1
公开(公告)日：2009-11-11
申请号：EP07845413.9
申请日：2007-12-20
申请人： Ofidium Pty Ltd
发明人： LOWERY, Arthur James , DU, Liang Bangyuan
IPC分类号： H04B10/18 , H04J14/02
CPC分类号： H04L27/2627 , H04B10/2543 , H04B10/6163 , H04B2210/254 , H04L25/03343 , H04L27/2096 , H04L27/2697 , H04L27/367 , H04L2025/03414
摘要： A method of transmitting information over a non-linear optical channel includes the step (152) of generating an information-bearing signal, preferably an OFDM signal, which includes a plurality of closely-spaced sub-carriers in the frequency domain. A time-varying phase modulation is determined (154), which is a first function, and preferably a linear function, of the transmitted optical power corresponding with the information-bearing signal. The information-bearing signal and the time-varying phase modulation are applied (156) to an optical source in order to generate a corresponding transmitted optical signal having substantially the stated transmitted optical power characteristic. The first function of transmitted optical power is selected so as to mitigate the effect of the non-linearity of the optical channel upon the transmitted optical signal. In alternative arrangements, a time-varying phase modulation, being a second function of optical power, is computed (162) and applied (164) to a signal received following transmission through a non-linear optical channel. The two alternative arrangements provide, respectively, for pre-compensation and post- compensation of non-linear propagation effects that may be carried out entirely within the electrical domain, for example using digital signal processing techniques.

4. 发明公开

EP2656519A1 ELECTRONIC COMPENSATION OF CROSS-PHASE MODULATION 审中-公开
标题翻译：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.

5. 发明公开

EP2486679A2 MULTICHANNEL NONLINEARITY COMPENSATION IN AN OPTICAL COMMUNICATIONS LINK 有权
标题翻译：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.

6. 发明授权

EP2356761B1 OPTICAL TRANSMITTER 有权
公开(公告)号：EP2356761B1
公开(公告)日：2018-03-28
申请号：EP09818674.5
申请日：2009-02-27
申请人： Ofidium Pty Ltd
发明人： LOWERY, Arthur, James , DU, Liang Bangyuan
IPC分类号： H04J14/00 , H04L27/32 , H04B10/2575 , H04L27/20 , H04L27/22
CPC分类号： H04L27/223 , H04B10/25759 , H04L27/2096
摘要： A method of generating an information-bearing optical signal (614) from input digital information (602) includes generating (604, 606) an information-bearing electrical signal comprising an in-phase (I) component and a quadrature (Q) component. Each of the components has a predetermined baseband bandwidth requirement (B). The I and Q signal components are combined (610) with corresponding I and Q components of a radio frequency (RF) carrier (608). The carrier has a central frequency greater than the signal bandwidth requirement (B). An optical source is modulated (612) with the combined I and Q signal and carrier components, in order to produce a modulated optical signal (614) which comprises an optical carrier corresponding with the RF carrier, and substantially only a single information-bearing optical sideband in an optical frequency domain, corresponding with the information-bearing electrical signals. Transmitters implementing the method are also disclosed.

7. 发明公开

EP2356761A1 OPTICAL TRANSMITTER 有权
标题翻译：光学发射器
公开(公告)号：EP2356761A1
公开(公告)日：2011-08-17
申请号：EP09818674.5
申请日：2009-02-27
申请人： Ofidium Pty Ltd
发明人： LOWERY, Arthur, James , DU, Liang Bangyuan
IPC分类号： H04B10/155 , H04J14/00 , H04L27/32
CPC分类号： H04L27/223 , H04B10/25759 , H04L27/2096
摘要： A method of generating an information-bearing optical signal (614) from input digital information (602) includes generating (604, 606) an information-bearing electrical signal comprising an in-phase (I) component and a quadrature (Q) component. Each of the components has a predetermined baseband bandwidth requirement (B). The I and Q signal components are combined (610) with corresponding I and Q components of a radio frequency (RF) carrier (608). The carrier has a central frequency greater than the signal bandwidth requirement (B). An optical source is modulated (612) with the combined I and Q signal and carrier components, in order to produce a modulated optical signal (614) which comprises an optical carrier corresponding with the RF carrier, and substantially only a single information-bearing optical sideband in an optical frequency domain, corresponding with the information-bearing electrical signals. Transmitters implementing the method are also disclosed.
摘要翻译：从输入数字信息（602）生成信息承载光信号（614）的方法包括生成（604,606）包括同相（I）分量和正交（Q）分量的信息承载电信号。每个组件具有预定的基带带宽要求（B）。 I和Q信号分量与射频（RF）载波（608）的相应I和Q分量组合（610）。载波的中心频率大于信号带宽要求（B）。利用组合的I和Q信号以及载波分量对光源进行调制（612），以便产生包括与RF载波相对应的光载波的调制光信号（614），并且基本上只有单个信息承载光学在光频域中与带信息的电信号相对应的边带。还公开了实现该方法的发送器。

8. 发明授权

EP2543150B1 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).

9. 发明授权

EP2115907B1 NON-LINEARITY COMPENSATION IN AN OPTICAL TRANSMISSION 有权
标题翻译：光传输中的非线性补偿
公开(公告)号：EP2115907B1
公开(公告)日：2017-11-01
申请号：EP07845413.9
申请日：2007-12-20
申请人： Ofidium Pty Ltd
发明人： LOWERY, Arthur James , DU, Liang Bangyuan
IPC分类号： H04J14/02 , H04B10/61 , H04B10/2543 , H04L25/03 , H04L27/26 , H04L27/36 , H04L27/20
CPC分类号： H04L27/2627 , H04B10/2543 , H04B10/6163 , H04B2210/254 , H04L25/03343 , H04L27/2096 , H04L27/2697 , H04L27/367 , H04L2025/03414

10. 发明公开

EP2543150A2 METHOD AND SYSTEM FOR NON-LINEARITY COMPENSATION IN OPTICAL TRANSMISSION SYSTEMS 有权
标题翻译：方法和系统的非线性光传输系统中补偿
公开(公告)号：EP2543150A2
公开(公告)日：2013-01-09
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： H04B10/18
CPC分类号： H04B10/25073 , H04B10/6161 , H04B10/6163 , H04B10/6971
摘要： An equaliser (200) for equalisation of a signal transmitted via an optical fibre link from a transmitter to a corresponding receiver employs a backpropagation model (300) which comprises one or more sequential segments collectively representing an inverse fibre link. Each sequential segment comprises a linear backpropagation element (304), and a non-linear backpropagation element (306) having an associated compensation bandwidth (312). The equaliser (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).

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