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    Optical communications system having chromatic dispersion and polarization mode dispersion compensation
    3.
    发明授权
    Optical communications system having chromatic dispersion and polarization mode dispersion compensation 有权
    具有色散和偏振模色散补偿的光通信系统

    公开(公告)号：US09520950B2

    公开(公告)日：2016-12-13

    申请号：US12330691

    申请日：2008-12-09

    申请人： James Harley ,  Kim Roberts ,  Chuandong Li

    发明人： James Harley ,  Kim Roberts ,  Chuandong Li

    IPC分类号： H04B10/00 ,  H04B10/532 ,  H04B10/2513 ,  H04B10/69

    CPC分类号： H04B10/532 ,  H04B10/25137 ,  H04B10/6972 ,  H04B2210/252 ,  H04B2210/254

    摘要： Described are an optical communications system and a method that allow for compensation of chromatic dispersion and polarization mode dispersion imparted to a communications signal propagating through an optical link. The system is based on a cost-effective optical transport architecture that accommodates baud rates exceeding 15 Gbaud and eliminates the need for costly optical dispersion compensators. Compensation for polarization mode dispersion is performed at the receiver using nonlinear processing. Advantageously, direct detection modulation using inexpensive electro-optic system components can be used in place of more costly and complex coherent and differential modulation formats. Digital filtering can be performed at the transmitter and the input signal can be inverted based on the nonlinearity of the transmitter electro-optic components. Consequently, the bandwidth and linearity requirements for the transmitter electro-optic components are relaxed, and cost reductions are realized.

    摘要翻译： 描述了允许补偿通过光链路传播的通信信号的色散和偏振模色散的光通信系统和方法。 该系统基于具有成本效益的光学传输架构，其适应波特率超过15Gbaud，并且不需要昂贵的光学色散补偿器。 使用非线性处理在接收机处执行偏振模色散的补偿。 有利地，可以使用廉价的电光系统组件的直接检测调制来代替更昂贵和复杂的相干和差分调制格式。 可以在发射机处执行数字滤波，并且可以基于发射机电光部件的非线性来反转输入信号。 因此，放大了发射机电光元件的带宽和线性要求，并实现成本降低。

    Optimization of a communications system based on identification of an optical member
    5.
    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

    IPC分类号： H04B10/02 ,  H04B10/08 ,  H04B10/00

    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。

    Mapping arbitrary signals into SONET
    10.
    发明申请
    Mapping arbitrary signals into SONET 有权
    将任意信号映射到SONET

    公开(公告)号：US20060088061A1

    公开(公告)日：2006-04-27

    申请号：US11289351

    申请日：2005-11-30

    申请人： Kim Roberts

    发明人： Kim Roberts

    IPC分类号： H04L12/56 ,  H04J3/24

    CPC分类号： H04J3/1629 ,  H04J3/1611

    摘要： A synchronizer/de-synchronizer maps continuous format signals of an arbitrary rate into frames of pre-selected single common rate, such as SONET frames, with no bite changed and very little jitter or wander added. In this way, the continuous format signal may be carried transparently as a tributary of a SONET network. Each frame comprises a definite number of fixed stuff bits, including transport overhead bits and reminder fixed stuff bits. A frame also comprises an adjustable number of adaptive stuff bits, resulting from the phase difference between the arbitrary rate and the common rate. A mapping function is performed in a tributary unit shelf of a SONET transport shelf, and the reverse mapping function is performed in a similar way at the far end of a SONET connection. The stuff bits are spread uniformly within the frame.

    摘要翻译： 同步器/去同步器将任意速率的连续格式信号映射到预先选择的单个公共速率的帧，例如SONET帧，没有变化，并且添加了很少的抖动或漂移。 以这种方式，连续格式信号可以作为SONET网络的支路透明地携带。 每个帧包括一定数量的固定填充位，包括传输开销位和提醒固定填充位。 帧还包括可调数量的自适应填充位，由任意速率和公共速率之间的相位差产生。 在SONET传输架的支路单元架中执行映射功能，并且以类似的方式在SONET连接的远端执行反向映射功能。 填充位在帧内均匀分布。