公开(公告)号：US06968131B2

公开(公告)日：2005-11-22

申请号：US09963501

申请日：2001-09-27

申请人： Paul David Obeda ,  Robert Michael Bierman ,  Cuong Tu Dang ,  David Edward Nelles ,  Udo Mircea Neustadter

发明人： Paul David Obeda ,  Robert Michael Bierman ,  Cuong Tu Dang ,  David Edward Nelles ,  Udo Mircea Neustadter

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04J14/02 ,  H04Q11/00 ,  H04J14/04

CPC分类号： H04B10/0773 ,  H04B2210/071 ,  H04B2210/074 ,  H04J14/0227 ,  H04J14/0284 ,  H04J14/0287 ,  H04Q2011/009

摘要： In an optical WDM network, each optical channel is modulated with a respective channel identity. Detectors, conveniently at multiplex ports of optical band filters, detect the channel identities of all of the optical channels in an optical signal at the respective points to produce respective channel lists. A network management system determines channel lists for through ports of the optical band filters, identifies matching pairs of channel lists to determine a topology of each node and to identify optical paths entering or leaving each node, and identifies matching pairs of channel lists for these paths to determine an inter-node topology of the network. The channel identity detector points can alternatively be at the optical paths entering or leaving each node.

摘要翻译： 在光WDM网络中，每个光信道用相应的信道标识进行调制。 检测器在光带滤波器的多路复用端口方便地检测在各个点的光信号中的所有光信道的信道标识，以产生相应的信道列表。 网络管理系统确定光带过滤器的通过端口的信道列表，识别匹配的信道列表对以确定每个节点的拓扑并且识别进入或离开每个节点的光路径，并且识别这些路径的匹配的信道列表对 以确定网络的节点间拓扑。 信道身份检测点可以替代地在进入或离开每个节点的光路上。

公开(公告)号：US07127165B2

公开(公告)日：2006-10-24

申请号：US10628418

申请日：2003-07-29

申请人： Paul David Obeda ,  Robert Michael Bierman ,  James Benson Bacque ,  Colin Geoffrey Kelly ,  Derrick Remedios ,  Ping Wai Wan

发明人： Paul David Obeda ,  Robert Michael Bierman ,  James Benson Bacque ,  Colin Geoffrey Kelly ,  Derrick Remedios ,  Ping Wai Wan

IPC分类号： H04B10/08

CPC分类号： H04B10/079 ,  H04B10/07955 ,  H04B2210/075

摘要： A method and system for compensating for side effects of cross gain modulation in amplified optical networks, which allows reliable identification of expected and unexpected channels in the network is provided. Each optical channel traveling in the optical network is marked with a unique channel signature (expected channel signature), having one or more dither tone modulated onto the optical channel; followed by detecting a spectrum of tones, including said modulated dither tones and ghost tones thereof produced by the cross gain modulation in the optical network, at various locations in the optical network. Amplitudes of the spectrum tones, which belong to the expected channel signature, are compared with a first threshold, while amplitudes of the remaining spectrum tones, which are not the valid tones, are compared with a second threshold, which is lower than the first threshold. The spectrum tones are identified as valid tones if their amplitudes are above the first threshold; and an alarm signaling that the expected channel signature is missing is generated if the amplitude of the spectrum tone is below the first threshold. Yet another alarm is generated signaling that an unexpected channel is detected in the network if the amplitude of at least one of the remaining spectrum tones is exceeding the second threshold. Alternatively, the other alarm is generated if amplitudes of the remaining spectrum tones belonging to one of the allowable channel signatures in the network are above the second threshold. A corresponding system incorporating the step of the methods described above is also provided.

摘要翻译： 提供了一种用于补偿放大光网络中交叉增益调制的副作用的方法和系统，其允许可靠地识别网络中的预期和意外信道。 在光网络中行进的每个光信道被标记为具有调制到光信道上的一个或多个抖动音调的唯一信道签名（预期信道签名）; 随后在光网络中的各个位置处检测包括由光网络中的交叉增益调制产生的所述调制抖动音和其重音的音调。 将属于预期信道签名的频谱音调的幅度与第一阈值进行比较，而不是有效音调的剩余频谱音调的幅度与低于第一阈值的第二阈值进行比较 。 如果它们的幅度高于第一阈值，则频谱色调被识别为有效音调; 并且如果频谱色调的幅度低于第一阈值，则产生警告，指示预期信道签名丢失。 如果剩余频谱色调中的至少一个的幅度超过第二阈值，则产生另一报警，指示在网络中检测到意外信道。 或者，如果属于网络中的一个可允许频道签名的剩余频谱的幅度高于第二阈值，则产生另一警报。 还提供了包括上述方法的步骤的相应系统。

公开(公告)号：US06996323B2

公开(公告)日：2006-02-07

申请号：US10618582

申请日：2003-07-15

申请人： Gordon Bruce Scarth ,  Robert Michael Bierman ,  Paul David Obeda ,  Omayma Moharram ,  Victoria Donnelly

发明人： Gordon Bruce Scarth ,  Robert Michael Bierman ,  Paul David Obeda ,  Omayma Moharram ,  Victoria Donnelly

IPC分类号： G02B6/00

CPC分类号： H04B10/07955 ,  H04B10/077

摘要： A system and method for operating a plurality of eVOAs in an optical network is provided. The system comprises a number of eVOAs, each eVOA coupled to one or more optical taps and connected to a microcontroller. The microcontroller comprises a monitor signal processing controller for measuring the power of the optical signal at the eVOAs; a scheduler for continuously cycling and checking the eVOAs operating attenuations; a microprocessing controller for determining, setting, adjusting and updating the eVOA operating attenuation and a means for communications between the microprocessor and the other controller within the system. The microcontroller cycles through the plurality of eVOAs and controls one eVOA at a time according to a predetermined method of the eVOA operation. Individual eVOAs may be controlled according to the same or different methods of controlling operations thereof as required.

摘要翻译： 提供了一种在光网络中操作多个eVOA的系统和方法。 该系统包括多个eVOA，每个eVOA耦合到一个或多个光学抽头并连接到微控制器。 微控制器包括用于测量eVOA处的光信号的功率的监视信号处理控制器; 用于连续循环和检查eVOA操作衰减的调度器; 用于确定，设置，调整和更新eVOA操作衰减的微处理控制器以及用于系统内的微处理器与另一个控制器之间的通信的装置。 微控制器循环通过多个eVOA并根据eVOA操作的预定方法一次控制一个eVOA。 可以根据需要控制其操作的相同或不同的方法来控制各个eVOA。

公开(公告)号：US06987922B2

公开(公告)日：2006-01-17

申请号：US10440247

申请日：2003-05-19

申请人： Robert Michael Bierman ,  Omayma Moharram ,  Victoria Donnelly

发明人： Robert Michael Bierman ,  Omayma Moharram ,  Victoria Donnelly

IPC分类号： G02B6/00

CPC分类号： H04B10/077 ,  H04B10/07955 ,  H04J14/0221

摘要： This invention describes a method for controlling attenuation for a variable optical attenuator (VOA) inserted in an optical path of an optical signal propagating in an optical network, comprising the steps of measuring power of the optical signal at the VOA; comparing the measured power with a target power; and if the measured power differs from the target power, changing the attenuation of the VOA in one or more variable size intervals (VSI) so that the power of the optical signal substantially equals to the target power, wherein the VSI being a function of the measured power and target power. The method further comprises the step of comparing the measured power with a Loss-of-signal (LOS) power threshold, and if the measured power is less than the LOS power threshold, changing the attenuation of the VOA in one or more variable size intervals so that the power of the optical signal substantially higher than the LOS power threshold, wherein the size of the variable interval being a function of the measured power and the LOS power threshold. The method dynamically computes a VSI, updates the VOA setting by said VSI, and manages a combination of open and closed VOA control loops to maintain the target power attenuation of the VOA The corresponding apparatus for controlling the VOA is also provided.

摘要翻译： 本发明描述了一种用于控制插入在光网络中传播的光信号的光路中的可变光衰减器（VOA）的衰减的方法，包括以下步骤：在VOA处测量光信号的功率; 将测量的功率与目标功率进行比较; 并且如果测量的功率与目标功率不同，则以一个或多个可变尺寸间隔（VSI）改变VOA的衰减，使得光信号的功率基本上等于目标功率，其中VSI是 测量功率和目标功率。 该方法还包括将所测量的功率与信号丢失（LOS）功率阈值进行比较的步骤，并且如果所测量的功率小于LOS功率阈值，则在一个或多个可变大小间隔中改变VOA的衰减 使得光信号的功率明显高于LOS功率阈值，其中可变间隔的大小是测量功率和LOS功率阈值的函数。 该方法动态地计算VSI，通过所述VSI更新VOA设置，并且管理开放和关闭的VOA控制环路的组合以维持VOA的目标功率衰减。还提供了用于控制VOA的相应设备。

公开(公告)号：US07072561B2

公开(公告)日：2006-07-04

申请号：US10618604

申请日：2003-07-15

申请人： Gordon Bruce Scarth ,  Robert Michael Bierman ,  Steve Joseph Grabner

发明人： Gordon Bruce Scarth ,  Robert Michael Bierman ,  Steve Joseph Grabner

IPC分类号： G02B6/00

CPC分类号： H04B10/077 ,  H04B10/07955

摘要： A method and apparatus are disclosed for operating an eVOA by modulating its attenuation. If an optical signal power is below a loss of signal (LOS) power threshold the eVOA attenuation is set to a maximum attenuation and then, periodically and quickly decreased and increased in steps while checking for the presence of optical signals above the LOS power threshold. The method is also used for operating a multiplicity of eVOAs while minimizing the risk of damage to optical network equipment.

摘要翻译： 公开了一种通过调制其衰减来操作eVOA的方法和装置。 如果光信号功率低于信号损失（LOS）功率阈值，则将eVOA衰减设置为最大衰减，然后周期性地快速地减小并逐步增加，同时检查高于LOS功率阈值的光信号的存在。 该方法还用于操作多个eVOA，同时最小化对光网络设备的损坏风险。

公开(公告)号：US06903867B2

公开(公告)日：2005-06-07

申请号：US10195495

申请日：2002-07-16

申请人： Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

发明人： Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

IPC分类号： H04B10/17 ,  H01S3/00

CPC分类号： H04B10/2942 ,  H04B10/2935

摘要： An apparatus and method for minimizing channel gain excursion in an optical system with automatic gain control is provided. The apparatus includes a feedback control loop which dynamically regulates the target gain of an automatic gain controlled (AGC) amplifier so as to compensate for the action of the AGC amplifier to maintain a constant linear average gain without accounting for the distribution of channels that carry signals across the amplifier spectral gain profile, which causes gain excursion of individual channels. The feedback control loop measures gain of individual channels and uses these measurements to regulate the target gain of the amplifier so as to minimize gain excursion of individual channels. If required, the apparatus may be integrated into a package. In one embodiment, the method for regulating the target gain is to maintain constant gain for all channels irrespective of the number of channels that carry a signal. This method is simple and guarantees no gain excursion. In another embodiment, a weight is assigned to an individual channel to calculate a weighted average for the target gain of the amplifier while attempting to minimize gain excursion of individual channels.

摘要翻译： 提供一种用于使具有自动增益控制的光学系统中的通道增益偏移最小化的装置和方法。 该装置包括反馈控制回路，其动态地调节自动增益控制（AGC）放大器的目标增益，以便补偿AGC放大器的动作以维持恒定的线性平均增益，而不考虑携带信号的信道的分布 在放大器频谱增益曲线上，这导致单个通道的增益偏移。 反馈控制环路测量单个通道的增益，并使用这些测量来调节放大器的目标增益，以便最小化各个通道的增益偏移。 如果需要，该装置可以集成到包装中。 在一个实施例中，用于调节目标增益的方法是保持所有通道的恒定增益，而不管携带信号的通道数量如何。 这种方法很简单，保证没有增益偏移。 在另一个实施例中，将权重分配给单个信道以计算放大器的目标增益的加权平均值，同时尝试最小化各个信道的增益偏移。

公开(公告)号：US06674935B2

公开(公告)日：2004-01-06

申请号：US09880811

申请日：2001-06-15

申请人： Colin Geoffrey Kelly ,  Robert Michael Bierman

发明人： Colin Geoffrey Kelly ,  Robert Michael Bierman

IPC分类号： G02B628

CPC分类号： H04J14/0213 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0219

摘要： An optical connection arrangement is provided in an optical path to facilitate changing optical add/drop multiplexer (OADM) and other optical component modules while optical traffic is present on the optical path, with minimal interruption to such traffic. The connection arrangement has a plurality of optical ports to each of which an optical component can be coupled, and one or more optical switches which can be controlled to selectively include in the optical path or bypass each optical port. Such connection arrangements can be coupled in series and/or in parallel for convenient modular add/drop configurations and for opposite directions of transmission of optical traffic on respective optical paths.

摘要翻译： 在光路中提供光学连接装置，以便在光学通信存在于光路上，同时对这种业务的中断最小化的同时便于改变光分插复用器（OADM）和其它光学组件模块。 连接装置具有多个光学端口，每个光学部件可以耦合到其中，并且可以控制一个或多个光学开关以选择性地包括在光路中或绕过每个光学端口。 这种连接装置可以串联和/或并联耦合以便于模块化的分插配置以及相应光路上的光通信的相反方向传输。