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公开(公告)号：US6124960A
公开(公告)日：2000-09-26
申请号：US929360
申请日：1997-09-08
CPC分类号： H04B10/25137 , H04B10/255 , H04B10/2557
摘要： In a WDM transmission system carrying amplitude modulated traffic in which significant cross-phase modulation occurs, each of the individual channels is pre-chirped at the transmitter with replicas, or low-pass filtered replicas of the amplitude modulation applied to each of the other channels. Prechirping of each individual channel with a replica of the amplitude modulation applied to that channel may be added in order additionally to provide compensation for self-phase modulation.
摘要翻译： 在承载幅度调制业务的WDM传输系统中，发生显着的跨相位调制，各个信道在发射机处被预先啁啾，其中复制或低通滤波后的复制品被施加到每个其它信道 。 每个单独信道的预加速可以应用于该信道的幅度调制的复制品，以便额外地添加以对自相位调制提供补偿。
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公开(公告)号：US20180343078A1
公开(公告)日：2018-11-29
申请号：US15796393
申请日：2017-10-27
IPC分类号： H04J14/02 , H04B10/079 , H04Q11/00 , H04B10/58
CPC分类号： H04J14/0221 , H04B10/0793 , H04B10/07955 , H04B10/2543 , H04B10/255 , H04B10/2557 , H04B10/58 , H04B2210/254 , H04J14/0275 , H04Q11/0066 , H04Q2011/0041 , H04Q2011/0083
摘要： Multiple receivers are comprised in a flexible coherent transceiver of a multi-span optical fiber network. Each of the multiple receivers is operative to handle communications on a respective channel. The multiple receivers measure optical characteristics. For each of the multiple receivers, the optical characteristics include optical nonlinear interactions on the respective channel, the optical nonlinear interactions being at least partially dependent from one span to another span. An optical power of a signal on each of the multiple channels is adjusted as a function of the optical characteristics.
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公开(公告)号：US09960843B2
公开(公告)日：2018-05-01
申请号：US15135272
申请日：2016-04-21
IPC分类号： H04B10/077 , H04B10/079
CPC分类号： H04B10/0775 , G01M11/335 , G01M11/39 , H04B10/07 , H04B10/0795
摘要： Using pump-probe measurements on multi-span optical links may result in the determination of one or more of the following: 1) wavelength-dependent power profile and gain evolution along the optical link; 2) wavelength-dependent dispersion map; and 3) location of regions of high polarization-dependent loss (PDL) and polarization-mode dispersion (PMD). Such measurements may be a useful diagnostic for maintenance and upgrade activities on deployed cables as well as for commissioning new cables.
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公开(公告)号：US09768875B2
公开(公告)日：2017-09-19
申请号：US14644320
申请日：2015-03-11
IPC分类号： H04B10/00 , H04B10/04 , H04B10/532 , H04B10/2557 , H04B10/50 , H04B10/61 , H04B10/564
CPC分类号： H04B10/532 , H04B10/2557 , H04B10/5055 , H04B10/564 , H04B10/61
摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signalling interval, and has a second value when averaged across more than one and fewer than 100 signalling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.
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公开(公告)号：US07680420B1
公开(公告)日：2010-03-16
申请号：US10872850
申请日：2004-06-21
申请人： Dave Walker , Kim B. Roberts , Maurice O'Sullivan , Leo Strawczynski , James Whiteaway , Christopher Fludger , Han Henry Sun , Adrien Comeau
发明人： Dave Walker , Kim B. Roberts , Maurice O'Sullivan , Leo Strawczynski , James Whiteaway , Christopher Fludger , Han Henry Sun , Adrien Comeau
IPC分类号： H04B10/00
CPC分类号： H04B10/5051 , H04B10/25137
摘要： A method of synthesizing a modulated optical signal using a laser cascaded with an amplitude modulator. A phase drive signal VF(t) is derived for driving the laser to generate an optical carrier signal with a desired phase φ(t). An amplitude drive signal VS(t) is then derived for driving the amplitude modulator to impose a desired amplitude S(t) onto the optical carrier signal generated by the laser. The amplitude drive signal VS(t) is compensated for amplitude modulation of the optical carrier signal generated by the laser.
摘要翻译： 使用与幅度调制器级联的激光来合成调制光信号的方法。 导出相位驱动信号VF（t），用于驱动激光器以产生具有期望相位（t）的光载波信号。 然后导出幅度驱动信号VS（t），用于驱动幅度调制器，以将期望的振幅S（t）施加到由激光器产生的光载波信号上。 振幅驱动信号VS（t）被补偿由激光器产生的光载波信号的幅度调制。
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6.发明授权公开(公告)号：US07672595B1
公开(公告)日：2010-03-02
申请号：US10742808
申请日：2003-12-23
申请人： John McNicol , Maurice O'Sullivan
发明人： John McNicol , Maurice O'Sullivan
IPC分类号： H04B10/12
CPC分类号： H04B10/25133
摘要： An optical communications system for conveying traffic through an optical link between transmitting and receiving nodes. The system comprises, for each node, respective legacy and bypass paths coupled in parallel between the optical link and the node. The legacy path of each node includes an optical dispersion compensation block for compensating a respective portion of dispersion of the link. Thus the present invention provides a system architecture by which an optical communications system can be constructed using conventional modulation and optical dispersion compensation technologies. Once installed, system growth can be accommodated using next generation transmitters (with electronic compensation) without stranding the legacy equipment. Legacy channels can also be upgraded to electronic compensation, as desired.
摘要翻译： 一种用于通过发送和接收节点之间的光链路传送业务的光通信系统。 对于每个节点，该系统包括在光链路和节点之间并行耦合的相应传统和旁路路径。 每个节点的遗留路径包括用于补偿链路的相应部分色散的光学色散补偿块。 因此，本发明提供了一种可以使用常规调制和光色散补偿技术构建光通信系统的系统架构。 一旦安装，可以使用下一代发射器（带电子补偿）来适应系统增长，而不会使传统设备绞合。 根据需要，旧版频道也可升级为电子补偿。
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7.发明申请Optimization of a communications system based on identification of an optical member 审中-公开基于光学构件的识别的通信系统的优化公开(公告)号：US20050074244A1
公开(公告)日：2005-04-07
申请号：US10625696
申请日：2003-07-24
申请人： Kim Roberts , Maurice O'Sullivan , Paul Warren , Les Chan
发明人： Kim Roberts , Maurice O'Sullivan , Paul Warren , Les Chan
CPC分类号： H04B10/0793
摘要： An optical communications system is adapted for connection to an optical fiber link of an optical communications network. The system obtains a fiber identifier respecting the optical fiber link; a respective optimum setting of one or more parameters of the optical communications system; and adjusts a respective value of each parameter in accordance with the respective optimum setting. The fiber identifier can be obtained from a value of at least one fiber transmission property of the optical fiber link. The fiber transmission property value is used to search a look-up table of class definitions, each class definition including a respective class identifier and at least one corresponding characteristic transmission property value. A class identifier is selected as the fiber identifier from the class definition for which each characteristic transmission property value most closely matches a corresponding fiber transmission property value. Each class definition may also include an optimum setting for each parameter.
摘要翻译： 光通信系统适于连接到光通信网络的光纤链路。 该系统获得关于光纤链路的光纤标识符; 光通信系统的一个或多个参数的相应最佳设置; 并根据各自的最佳设定调整各参数的相应值。 可以从光纤链路的至少一个光纤传输特性的值获得光纤标识符。 光纤传输属性值用于搜索类定义的查找表，每个类定义包括相应的类标识符和至少一个对应的特征传输属性值。 从类别定义中选择类别标识符作为每个特征传输特性值与其对应的光纤传输属性值最匹配的类定义。 每个类定义也可以包括每个参数的最佳设置。
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公开(公告)号：US11228383B2
公开(公告)日：2022-01-18
申请号：US16721747
申请日：2019-12-19
IPC分类号： H04L1/20 , H04B17/336
摘要： A system configured to perform a method for estimating external noise in a communication channel between a transmitter and a receiver is described. The method comprises obtaining a measurement of effective noise on decoded symbols at the receiver, the decoded symbols comprising noisy versions of symbols conveyed by a communication signal transmitted over the communication channel. The method further comprises storing a representation of a relationship between the effective noise, external noise in the communication channel, and one or more variable parameters. The method further comprises storing applicable values of the variable parameters, wherein each applicable value is associated with current properties of the transmitter or current properties of the receiver or both. The method further comprises calculating an estimate of the external noise in the communication channel using the effective noise, the applicable values of the variable parameters, and the representation of the relationship.
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公开(公告)号：US10608746B2
公开(公告)日：2020-03-31
申请号：US16024980
申请日：2018-07-02
申请人： Qunbi Zhuge , Kevin Farley , Kim B. Roberts , Maurice O'Sullivan
发明人： Qunbi Zhuge , Kevin Farley , Kim B. Roberts , Maurice O'Sullivan
IPC分类号： H04B10/06 , H04B10/40 , H04B10/079 , H04B10/556 , H04B10/588 , H04B10/61 , H04L1/00 , H04L7/00
摘要： A digital instruction is generated regarding one or more electrical-to-optical conversion impairments induced at the transmitter of an optical communication system. The digital instruction may be used by the transmitter to reduce the impairments. Alternatively, or additionally, the digital instruction may be used by the receiver of the optical communication system to compensate for the impairments.
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公开(公告)号：US10090920B1
公开(公告)日：2018-10-02
申请号：US15461718
申请日：2017-03-17
IPC分类号： H04B10/079 , H04B10/2507 , G06N99/00
摘要： A method of fiber Kerr nonlinear noise estimation in an optical transmission system comprises recovering received symbols from a received signal, isolating a noise component of the received signal, estimating coefficients of a matrix based on cross-correlations between the isolated noise component and the fields of a triplet of received symbols or training symbols or estimated transmitted symbols, estimating doublet correlations of the product or the quotient of the isolated noise component and the field of a received symbol or of a training symbol or of an estimated transmitted symbol, and estimating one or more parameters related to nonlinear noise based on the estimated coefficients of the matrix and based on the estimated doublet correlations.
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