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1. 发明授权

US06570682B2 Fault isolation of an optical link by correlating PMD events with other measurements 有权
公开(公告)号：US06570682B2
公开(公告)日：2003-05-27
申请号：US09993645
申请日：2001-11-27
申请人： Niall Robinson , Charles Mao , Frank A. McKiel
发明人： Niall Robinson , Charles Mao , Frank A. McKiel
IPC分类号： H04B1008
CPC分类号： H04B10/2569
摘要： A method and apparatus performing fault management in an optical communications system including a polarization mode dispersion (PMD) compensator. The method and apparatus utilizes a controller receiving notifications indicative of PMD in the system, as well as at least one indicator from a system device providing an indication of an attribute of the communication system. Such system devices include a receiver providing a Q factor and a bit error rate (BER) of an optical signal, and a signal-to-noise ratio meter providing an SNR of the optical signal. The method intelligently provides fault management by correlating the PMD notifications and system indicators to distinguish between fiber failure, PMD-related degradations, and failure of monitoring equipment itself.

2. 发明授权

US06404520B1 Fault isolation of an optical link by correlating PMD events with other measurements 有权
标题翻译：通过将PMD事件与其他测量值相关联来实现光链路的故障隔离
公开(公告)号：US06404520B1
公开(公告)日：2002-06-11
申请号：US09217357
申请日：1998-12-21
申请人： Niall Robinson , Charles Mao , Frank A. McKiel
发明人： Niall Robinson , Charles Mao , Frank A. McKiel
IPC分类号： H04B1008
CPC分类号： H04B10/2569
摘要： A method and apparatus performing fault management in an optical communications system including a polarization mode dispersion (PMD) compensator. The method and apparatus utilizes a controller receiving notifications indicative of PMD in the system, as well as at least one indicator from a system device providing an indication of an attribute of the communication system. Such system devices include a receiver providing a Q factor and a bit error rate (BER) of an optical signal, and a signal-to-noise ratio meter providing an SNR of the optical signal. The method intelligently provides fault management by correlating the PMD notifications and system indicators to distinguish between fiber failure, PMD-related degradations, and failure of monitoring equipment itself.
摘要翻译：一种在包括偏振模色散（PMD）补偿器的光通信系统中执行故障管理的方法和装置。该方法和装置利用控制器接收系统中指示PMD的通知，以及来自提供通信系统的属性的指示的系统设备的至少一个指示符。这样的系统设备包括提供光信号的Q因子和误码率（BER）的接收机以及提供光信号的SNR的信噪比计。该方法通过关联PMD通知和系统指示灯智能地提供故障管理，以区分光纤故障，PMD相关的降级和监控设备本身的故障。

3. 发明授权

US06970617B2 Reconfigurable service ring and method for operation in optical networks 失效
标题翻译：光网络可重构服务环和操作方法
公开(公告)号：US06970617B2
公开(公告)日：2005-11-29
申请号：US10337200
申请日：2003-01-07
申请人： Charles Mao , Lintao Zhang , Guohua Xiao
发明人： Charles Mao , Lintao Zhang , Guohua Xiao
IPC分类号： H04J14/02 , H04J14/00 , G02B6/28
CPC分类号： H04J14/0283 , H04J14/021 , H04J14/0212 , H04J14/0213 , H04J14/0227 , H04J14/0241
摘要： An optical reconfigurable service ring (RSR) architecture based on a RSR channel and WDM channel plan matrix, and method for operation in a fiber network that provides WDM wavelength networking functionalities such as provisional wavelength services, optical circuit switching, optical layer 2 packet switching, optical storage switching, and optical layer 3 packet routing, are proposed. In one embodiment, sixteen wavelength are dynamically switching, routed, or distributed among five optical add/drop nodes using narrowly wavelength tunable transmitters and fixed optical add/drop multiplexer modules.
摘要翻译：一种基于RSR信道和WDM信道平面矩阵的光学可重构业务环（RSR）架构，以及提供诸如临时波长业务，光电路交换，光层2分组交换等WDM波长组合功能的光纤网络中的操作方法，光存储交换和光层3分组路由。在一个实施例中，十六个波长在使用窄波长可调谐发射机和固定光分插复用器模块的五个光分插节点之间动态切换，路由或分布。

4. 发明授权

US06614587B1 Control methods for a metro optical amplifier 失效
标题翻译：城域光放大器的控制方法
公开(公告)号：US06614587B1
公开(公告)日：2003-09-02
申请号：US09795789
申请日：2001-02-28
申请人： Jun Yu , Charles Mao , Jin Xie
发明人： Jun Yu , Charles Mao , Jin Xie
IPC分类号： H01S300
CPC分类号： H04B10/296
摘要： A reliable and inexpensive method for deploying, operating and maintaining optical amplifiers in a variety of optical networks under a wide range of conditions using channel number reference tables. A preferred embodiment of the current invention may control one or more optical amplifiers or gain blocks operating in a variety of modes such as AGC mode, ALC mode and hybrid AGC/ALC mode without requiring the use of expensive channel counters. Channel number reference tables may be calculated based on initial input optical power output readings and a count of the number of channels initially served by the amplifier. According to the current invention, changes in the number of channels may be monitored and used to control a gain block by monitoring the gain block input optical power output, converting to a gain block voltage and referencing the channel number reference table.
摘要翻译：在广泛的条件下使用信道号参考表，在各种光网络中部署，操作和维护光放大器的可靠且廉价的方法。本发明的一个优选实施例可以控制一个或多个光功率放大器或增益块，其以各种模式（例如AGC模式，ALC模式和混合AGC / ALC模式）运行，而不需要使用昂贵的信道计数器。可以基于初始输入光功率输出读数和由放大器最初服务的通道数的计数来计算通道号参考表。根据本发明，可以通过监视增益块输入光功率输出，转换为增益块电压并参考频道号参考表来监视和使用信道数量的变化来控制增益块。

5. 发明授权

US06621625B1 Optical node including three-stage optical amplifier with automatic gain and level control 失效
标题翻译：光节点包括具有自动增益和电平控制的三级光放大器
公开(公告)号：US06621625B1
公开(公告)日：2003-09-16
申请号：US09736855
申请日：2000-12-13
申请人： Lintao Zhang , Guohua Xiao , Charles Mao , Xiofan Cao , Jialing Yang , Jin Xie , Gang Li
发明人： Lintao Zhang , Guohua Xiao , Charles Mao , Xiofan Cao , Jialing Yang , Jin Xie , Gang Li
IPC分类号： H01S300
CPC分类号： H04B10/2942 , H01S3/06758 , H01S3/1301 , H04B10/2513
摘要： An optical node and method for operation in an ultra long haul backbone network that provides DWDM optical transmission and wavelength networking functionalities are disclosed. The optical node is designed with capabilities for amplification, dispersion compensation, and add/drop functionalities. In one embodiment, three erbium-doped fiber amplifier (EDFA) are cascaded using low nonlinearity and low loss dispersion compensating module (DCM).
摘要翻译：公开了一种用于在提供DWDM光传输和波长联网功能的超长骨干网中操作的光节点和方法。光节点设计具有放大，色散补偿和添加/删除功能的功能。在一个实施例中，使用低非线性和低损耗色散补偿模块（DCM）级联三个掺铒光纤放大器（EDFA）。

6. 发明授权

US06417964B1 Reconfigurable automatic gain control and method for optical amplifier 失效
标题翻译：可重构自动增益控制和光放大器的方法
公开(公告)号：US06417964B1
公开(公告)日：2002-07-09
申请号：US09777162
申请日：2001-02-05
申请人： Lintao Zhang , Charles Mao , Xiaofan Cao , Guohua Xiao
发明人： Lintao Zhang , Charles Mao , Xiaofan Cao , Guohua Xiao
IPC分类号： H04B1012
CPC分类号： H04B10/2931
摘要： A reconfigurable AGC loop design for an optical amplifier with a software provisional switch in the AGC loop inside the optical amplifier is disclosed. On the input side, there is a 1×m switch for switching a first input to the input of an optical amplifier, or to route other external pins to the optical amplifier. On the output side, there is a 1×n switch for switching a first output to the output of an optical amplifier, or to route other external pins to the optical amplifier. The AGC loop inside an optical amplifier is available to operate with other external signals. This reconfigurability unleashes the AGC loop capability that is traditionally confined to individual optical amplifier, provides flexibility, and greatly simplifies the design of optical node.
摘要翻译：公开了一种用于具有在光放大器内的AGC环路中的软件临时开关的光放大器的可重构AGC环路设计。在输入端，有一个1xm开关，用于将第一个输入切换到光放大器的输入端，或将其他外部引脚连接到光放大器。在输出端，有一个1xn开关，用于将第一个输出切换到光放大器的输出，或将其他外部引脚连接到光放大器。光放大器内的AGC环路可用于与其他外部信号一起工作。这种可重新配置释放了传统上限于单个光放大器的AGC环路功能，提供了灵活性，并大大简化了光节点的设计。

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