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    Method and apparatus for supressing crosstalk between data and monitoring channel in an optical communication system
    13.
    发明授权
    Method and apparatus for supressing crosstalk between data and monitoring channel in an optical communication system 有权
    用于抑制光通信系统中的数据和监视信道之间的串扰的方法和装置

    公开(公告)号：US06327250B1

    公开(公告)日：2001-12-04

    申请号：US09217320

    申请日：1998-12-21

    申请人： Chien-Jen Chen ,  Alexei N. Pilipetskii ,  Ekaterina A. Golovchenko

    发明人： Chien-Jen Chen ,  Alexei N. Pilipetskii ,  Ekaterina A. Golovchenko

    IPC分类号： H04B1008

    CPC分类号： H04B10/0775 ,  H04B2210/075

    摘要： A method and apparatus is provided for monitoring an optical transmission path through an optical transmission system supporting bidirectional communication between first and second terminals along first and second optical transmission paths. The first transmission path includes at least one optical amplifier located therein. In accordance with the method, a test signal is generated, which is formed by a superposition of first and second optical tones located at first and second wavelengths, respectively. The first and second wavelengths are within the bandwidth of the optical amplifier. The amplitude and phase of the first and second optical tones are arranged so that the test signal has a substantially constant intensity over a modulation cycle of the first and second optical tones. The test signal is transmitted from the first terminal along the first optical transmission path and through the optical amplifier. A portion of the test signal is received at the first terminal after it traverses the optical amplifier, an optical loop-back path, and a second transmission path. The received portion of the test signal may be compared to a delayed rendition of the generated test signal to assess transmission path performance.

    摘要翻译： 提供一种方法和装置，用于通过支持沿着第一和第二光传输路径的第一和第二端子之间的双向通信的光传输系统来监测光传输路径。 第一传输路径包括位于其中的至少一个光放大器。 根据该方法，产生测试信号，该测试信号通过分别位于第一和第二波长处的第一和第二光学音调的叠加而形成。 第一和第二波长在光放大器的带宽内。 布置第一和第二光学色调的幅度和相位，使得测试信号在第一和第二光学色调的调制周期上具有基本上恒定的强度。 测试信号从第一端子沿着第一光传输路径和光放大器传输。 测试信号的一部分在其穿过光放大器，光环回路径和第二传输路径之后在第一终端处被接收。 测试信号的接收部分可以与生成的测试信号的延迟再现进行比较，以评估传输路径性能。

    Efficient method for assessing the system performance of an optical transmission system while accounting for penalties arising from nonlinear interactions
    14.
    发明授权
    Efficient method for assessing the system performance of an optical transmission system while accounting for penalties arising from nonlinear interactions 有权
    用于评估光传输系统的系统性能的高效方法，同时考虑到由非线性相互作用引起的惩罚

    公开(公告)号：US06259543B1

    公开(公告)日：2001-07-10

    申请号：US09251501

    申请日：1999-02-17

    申请人： Ekaterina A. Golovchenko ,  Alexei N. Pilipetskii

    发明人： Ekaterina A. Golovchenko ,  Alexei N. Pilipetskii

    IPC分类号： H04B1000

    CPC分类号： H04B10/0795

    摘要： A method is provided for determining the system performance of an optical transmission system that supports an optical signal having a plurality of channels. The method begins by selecting a set of parameters defining characteristics of the transmission system. Exemplary parameters include, for example, the system's length, bit rate, the number of amplifiers and channels employed, and the wavelengths of the channels and their respective power levels. The method continues by determining a baseline value of the system performance that accounts for fiber loss, optical amplifier gain and noise, and system gain equalization. Next, a first penalty to the baseline system performance is determined. The first penalty arises from a nonlinear interaction between the optical signal and amplified spontaneous emission. A second penalty to the baseline system performance is then determined. The second penalty arises from self-phase modulation and cross-phase modulation. Finally, the first and second penalties are subtracted from the baseline system performance to obtain a value of system performance for the transmission system.

    摘要翻译： 提供了一种用于确定支持具有多个信道的光信号的光传输系统的系统性能的方法。 该方法开始于选择一组定义传输系统特性的参数。 示例性参数包括例如系统的长度，比特率，所使用的放大器和信道的数量以及信道的波长及其相应的功率电平。 该方法通过确定考虑光纤损耗，光放大器增益和噪声以及系统增益均衡的系统性能的基线值来继续。 接下来，确定基准系统性能的第一个惩罚。 第一个惩罚是由光信号与放大自发发射之间的非线性相互作用引起的。 然后确定基准系统性能的第二个惩罚。 第二个惩罚是由自相位调制和交叉相位调制引起的。 最后，从基准系统性能中减去第一和第二惩罚，以获得传输系统的系统性能值。

    Method and system for fault recovery in an optical network
    15.
    发明授权
    Method and system for fault recovery in an optical network 有权
    光网络故障恢复方法与系统

    公开(公告)号：US08891957B2

    公开(公告)日：2014-11-18

    申请号：US13181992

    申请日：2011-07-13

    申请人： Ruomei Mu ,  Ekaterina A. Golovchenko ,  Frank W. Kerfoot, III

    发明人： Ruomei Mu ,  Ekaterina A. Golovchenko ,  Frank W. Kerfoot, III

    IPC分类号： G02F1/00 ,  H04B10/03 ,  H04B10/079 ,  H04J14/02

    CPC分类号： H04B10/03 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/80 ,  H04J14/0201 ,  H04J14/0268

    摘要： A method of managing fault recovery in a trunk-branched OADM network may include determining that an optical power level over data channels of a first communications link between a first and a second terminal of the branched optical network exceeds an optical power limit. The method may further include increasing optical power sent over spare channels of the first communications link to a first level at which the optical power level over the data channels decreases to a second level below the optical power limit.

    摘要翻译： 管理中继分支OADM网络中的管理故障恢复的方法可以包括确定在分支光网络的第一和第二终端之间的第一通信链路的数据信道上的光功率电平超过光功率极限。 该方法还可以包括将在第一通信链路的备用信道上发送的光功率增加到数据信道上的光功率电平降低到光功率极限以下的第二电平的第一电平。

    Configuration and operation of inverse multiplexing communication system
    16.
    发明授权
    Configuration and operation of inverse multiplexing communication system 有权
    逆多路复用通信系统的配置与操作

    公开(公告)号：US08537852B2

    公开(公告)日：2013-09-17

    申请号：US12775878

    申请日：2010-05-07

    申请人： Ekaterina A. Golovchenko ,  Sameh A. Sabet

    发明人： Ekaterina A. Golovchenko ,  Sameh A. Sabet

    IPC分类号： H04J3/16

    CPC分类号： H04L25/14

    摘要： An inverse multiplexing communication path is established in at least one direction between nodes connected by a plurality of lower bandwidth bearing channels between the nodes, on which the content of a higher bandwidth signal is distributed and from which the original high bandwidth signal is recovered at the receiving node. During preliminary configuration, for example when selecting a subset of bearer channels from among a number of potential bearer channels, the bearer channels are chosen or are altered by signal processing to make the members of the subset perform similarly, thereby improving operations as compared to having the bearer channels bound to perform according to the performance of the least-performing member of the subset.

    摘要翻译： 在由节点之间的多个较低带宽承载信道连接的节点之间的至少一个方向上建立反向多路复用通信路径，在该方向上分配较高带宽信号的内容，并且在其上恢复原始高带宽信号 接收节点。 在初步配置期间，例如当从多个潜在承载信道中选择承载信道的子集时，通过信号处理来选择或改变承载信道，以使子集的成员执行类似的操作，从而与具有 绑定到根据子集的性能最差的成员执行的承载信道。

    Optical transmission system including repeatered and unrepeatered segments
    18.
    发明授权
    Optical transmission system including repeatered and unrepeatered segments 有权
    光传输系统包括中继和无中继段

    公开(公告)号：US07574140B2

    公开(公告)日：2009-08-11

    申请号：US11021726

    申请日：2004-12-22

    申请人： Massimo Manna ,  Ekaterina A. Golovchenko ,  Mark Enright

    发明人： Massimo Manna ,  Ekaterina A. Golovchenko ,  Mark Enright

    IPC分类号： H04B10/16

    CPC分类号： H04B10/2935 ,  H04B10/2937

    摘要： A communication system including a repeatered trunk path and one or more unrepeatered branch segments coupled to the trunk path through associated submarine branching units. Each of the branch segments may be configured to carry at least the same channel capacity as the trunk path and may have a length greater than the average repeater spacing in the trunk path.

    摘要翻译： 一种通信系统，包括重复的中继线路径和一个或多个通过相关联的海底分支单元耦合到中继线路路径的无中继分支段。 每个分支段可以被配置为携带至少与中继线路径相同的信道容量，并且可以具有大于中继线路径中的平均中继器间隔的长度。

    Method and apparatus for chromatic dispersion compensation
    19.
    发明授权
    Method and apparatus for chromatic dispersion compensation 失效
    用于色散补偿的方法和装置

    公开(公告)号：US07379670B2

    公开(公告)日：2008-05-27

    申请号：US10103390

    申请日：2002-03-21

    申请人： Bamdad Bakhshi ,  Ekaterina A. Golovchenko ,  Dmitriy I. Kovsh ,  Michael Vaa

    发明人： Bamdad Bakhshi ,  Ekaterina A. Golovchenko ,  Dmitriy I. Kovsh ,  Michael Vaa

    IPC分类号： H04J14/02 ,  H04B10/12

    CPC分类号： H04B10/2513 ,  H04B10/2543

    摘要： A method and apparatus is provided for managing chromatic dispersion in an NRZ-based WDM long-haul optical transmission system so that nonlinearities are reduced, especially those at the edge channels of the band. The method includes using between 500 ps/nm and 2000 ps/nm of residual dispersion and a 40%/60% pre/post DCU split ratio when the channel wavelengths are shorter than the zero dispersion wavelength. Using these dispersion compensation rules, the nonlinear propagation effects in NRZ-based WDM systems is reduced, thus allowing for higher optical power per channel and/or longer transmission distances.

    摘要翻译： 提供了一种用于管理基于NRZ的WDM长距离光传输系统中的色散的方法和装置，使得非线性减小，特别是在频带的边缘信道处的非线性。 当沟道波长比零色散波长短时，该方法包括使用500ps / nm和2000ps / nm的残余色散和40％/ 60％的前/后DCU分离比。 使用这些色散补偿规则，减少了基于NRZ的WDM系统中的非线性传播效应，从而允许每个通道的更高的光功率和/或更长的传输距离。

    Reduction of collision induced timing jitter by periodic dispersion management in soliton WDM transmission
    20.
    发明授权
    Reduction of collision induced timing jitter by periodic dispersion management in soliton WDM transmission 失效
    通过在孤子WDM传输中的周期性色散管理减少碰撞引起的定时抖动

    公开(公告)号：US06407841B1

    公开(公告)日：2002-06-18

    申请号：US09571009

    申请日：2000-05-15

    申请人： Ekaterina A. Golovchenko ,  Alexei N. Pilipetskii ,  Curtis R. Menvuk

    发明人： Ekaterina A. Golovchenko ,  Alexei N. Pilipetskii ,  Curtis R. Menvuk

    IPC分类号： H04B1000

    CPC分类号： H04B10/25077

    摘要： Collisions between solitons in different frequency channels are one of the major sources of errors in transmission systems that utilize wavelength division multiplexing (WDM). Moreover, because standard transmission lines have lumped amplification, the four-wave mixing fields from soliton collisions grow uncontrollably, adding amplitude and timing jitter to the jitter due to ideal soliton collisions. These problems are addressed by using a specific dispersion map to implement dispersion management, by which it is possible to significantly reduce the collision-induced timing jitter and to improve system performance even in comparison with that provided by an ideal, exponentially decreasing dispersion fiber.

    摘要翻译： 不同频率信道的孤子之间的冲突是使用波分复用（WDM）的传输系统中的主要错误来源之一。 此外，由于标准传输线路具有集总放大，孤岛碰撞的四波混频场不可控地增长，由于理想的孤子碰撞，增加了振幅和定时抖动对抖动的影响。 通过使用特定色散图来实现色散管理来解决这些问题，通过该色散管理可以显着减少碰撞引起的定时抖动并且即使与理想的指数递减的色散光纤相比提供的性能也能提高系统性能。