公开(公告)号：US06233072B1

公开(公告)日：2001-05-15

申请号：US09001884

申请日：1997-12-31

申请人： Shoa-Kai Liu ,  Glenn Wellbrock

发明人： Shoa-Kai Liu ,  Glenn Wellbrock

IPC分类号： H04B1008

CPC分类号： H04Q11/0062

摘要： The system and method of the present invention provide restoration of coincident line and facility failures. The system of the present invention includes light termination equipment (LTE) that is capable of detecting failures, determining the type of component that failed, determining which restoration facility to use based on the type of component that failed, and providing restoration. The system of the present invention also includes spare capacity for restoration, including protect channels and an optical restoration network. In addition, the system of the present invention includes an optical cross connect switch (OCCS) that is capable of switching electrical signals to the optical restoration network. The method of the present invention is involves detecting a failure, determining the type of component that failed, and sending an alarm to a centralized management center.

公开(公告)号：US06215565B1

公开(公告)日：2001-04-10

申请号：US09123088

申请日：1998-07-27

申请人： Gary B. Davis ,  John Fee ,  Shoa-Kai Liu

发明人： Gary B. Davis ,  John Fee ,  Shoa-Kai Liu

IPC分类号： H04B1008

CPC分类号： H04B10/03 ,  H04B10/07953

摘要： A method of monitoring performance of an optical communications system measures (i) sub-carrier signal-to-noise ratio, (ii) optical signal signal-to-noise ratio, and (iii) measuring optical signal bit error rate, and diagnoses a system component failure based upon measured sub-carrier signal-to-noise ratio, optical signal signal-to-noise ratio, and optical signal bit error rate.

摘要翻译： 监测光通信系统的性能的方法测量（i）副载波信噪比，（ii）光信号信噪比，和（iii）测量光信号比特误码率，并诊断a 基于测量的子载波信噪比，光信号信噪比和光信号误码率的系统组件故障。

公开(公告)号：US5914798A

公开(公告)日：1999-06-22

申请号：US580608

申请日：1995-12-29

申请人： Shoa-Kai Liu

发明人： Shoa-Kai Liu

IPC分类号： H04Q3/00 ,  H04Q11/00 ,  H04B10/20 ,  H04J14/02

CPC分类号： H04Q11/0062 ,  H04J14/0295 ,  H04Q3/0079 ,  H04J14/0284 ,  H04Q2011/0011 ,  H04Q2011/0039 ,  H04Q2011/0043 ,  H04Q2011/0081 ,  H04Q2011/0083 ,  H04Q2011/0086 ,  H04Q2011/009

摘要： An optical telecommunication network has a plurality of optical cross-connect switching nodes linked together by optical cables to form transmission paths for traffic between sending and destination stations. A centralized operation support system (OSS) is coupled to each node for receiving failure alarms and port status messages for failed cables from the switching nodes and terminal sites. The collected data is used to select alternate routes through the network using the spare capacity of the optical cross-connect switches and available wavelengths within the network. Any connection(s) to put into effect an alternate routing plan is broadcast to the affected nodes or terminal sites. A Real-Time Multiple Wavelength Routing (RMWR) algorithm is used by the OSS or by decentralized switching nodes to select, coordinate and route traffic among selected paths to bypass the failed cable such that wavelength collisions or adjacent cross-talk do not degrade the network performance. The OSS is updated when network restoration is performed by a switching node in the path of the failed cable.

摘要翻译： 光通信网络具有通过光缆链接在一起的多个光交叉连接交换节点，以形成发送站和目的站之间业务的传输路径。 集中式操作支持系统（OSS）耦合到每个节点，用于从交换节点和终端站点接收故障电缆的故障报警和端口状态消息。 收集的数据用于通过网络使用光交叉连接交换机的备用容量和网络中的可用波长来选择备用路由。 任何实施替代路由计划的连接都将广播到受影响的节点或终端站点。 OSS或分散式交换节点使用实时多波长路由（RMWR）算法来选择，协调和路由所选路径中的流量，以绕过故障电缆，使得波长冲突或相邻串扰不会降低网络 性能。 当故障电缆的路径中的交换节点进行网络恢复时，OSS被更新。

公开(公告)号：US6005694A

公开(公告)日：1999-12-21

申请号：US580391

申请日：1995-12-28

申请人： Shoa-Kai Liu

发明人： Shoa-Kai Liu

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04Q3/52 ,  H04Q11/00

CPC分类号： H04J14/0295 ,  H04B10/071 ,  H04B10/0771 ,  H04B10/0773 ,  H04L12/2697 ,  H04L43/50 ,  H04Q11/0062 ,  H04B2210/078 ,  H04J14/0294 ,  H04Q2011/0081 ,  H04Q2011/0083

摘要： A method and system for detecting optical signal degradation or loss within the optical domain of a fiber network. Optical cross-connect switches (OCCS) are provided at network nodes. Optical data traffic is conducted between nodes via a fiber link. The fiber link extends between respective ports of the optical cross-connect switches at each network node. Dedicated signals for detecting faults are introduced and removed within the optical domain of the fiber communication network. In one embodiment, transmitter/receiver units are coupled directly to the fiber link for broadcasting optical signals for fault detection. In another embodiment, transmitter/receiver units are coupled to the fiber link through one or more dedicated ports within optical cross-connect switches (OCCS) at network nodes. Optical signals for fault detection are then broadcast or switched through working and/or spare fibers. Distinctive optical fault detection signals are used when the signals are broadcast or switched over working fibers. Optical signal impairment or loss for a particular link or span is detected simply and quickly in the network optical domain. Rapid, accurate optical fault capability can be added to communication networks without requiring changes to existing light terminal elements and processing circuitry in the electrical domain.

摘要翻译： 一种用于检测光纤网络的光域内的光信号劣化或损耗的方法和系统。 网络节点提供光交叉连接交换机（OCCS）。 光数据业务通过光纤链路在节点之间进行。 光纤链路在每个网络节点处在光交叉连接交换机的相应端口之间延伸。 在光纤通信网络的光域内引入和去除用于检测故障的专用信号。 在一个实施例中，发射机/接收机单元直接耦合到光纤链路，用于广播用于故障检测的光信号。 在另一个实施例中，发射机/接收机单元通过网络节点处的光交叉连接交换机（OCCS）内的一个或多个专用端口耦合到光纤链路。 然后通过工作和/或备用光纤广播或切换用于故障检测的光信号。 当信号在工作光纤上进行广播或切换时，使用特殊的光学故障检测信号。 在网络光域中，简单快速地检测到特定链路或跨度的光信号损耗或丢失。 可以将快速，准确的光学故障能力添加到通信网络中，而不需要改变现有的轻终端元件和电域中的处理电路。

公开(公告)号：US5978130A

公开(公告)日：1999-11-02

申请号：US931500

申请日：1997-09-16

申请人： John Fee ,  Niall Robinson ,  Shoa-Kai Liu

发明人： John Fee ,  Niall Robinson ,  Shoa-Kai Liu

IPC分类号： H01S3/094 ,  H01S3/16 ,  H04B10/00

CPC分类号： H01S3/094003 ,  H01S3/1608 ,  H01S3/1613

摘要： A dual-band optical amplifier uses a single pump source, such as a YAG solid-state laser emitting a pump light at a wavelength of 1047 nm, to provide amplification in both the 1550 nm and 1310 nm bands which are commonly encountered in the optical telecommunications environment. The pump light is fed into a fiber doped with praseodymium fluoride having Pr atoms in a +3 ionization state. These ions exhibit a ground state absorption that includes the 1047 nm wavelength. The same pump light is also coupled to a separate amplification fiber doped with trivalent erbium ions and ytterbium. This combination of ions also can be pumped to a metastable excited state by a 1047 nm wavelength source. Accordingly, when photon emission is generated, there is signal amplification in both fibers results.

摘要翻译： 双波段光放大器使用单个泵浦源，例如发射波长为1047nm的泵浦光的YAG固态激光器，以在光学器件中通常遇到的1550nm和1310nm带中提供放大 电信环境。 泵浦光被馈送到掺杂有具有+3电离状态的Pr原子的氟化镨氟化物的纤维中。 这些离子表现出包括1047nm波长的基态吸收。 相同的泵浦光也耦合到掺杂有三价铒离子和镱的单独的放大光纤。 离子的这种组合也可以被1047nm的波长源泵送到亚稳激发态。 因此，当产生光子发射时，在两个光纤结果中都有信号放大。

公开(公告)号：US5726788A

公开(公告)日：1998-03-10

申请号：US720477

申请日：1996-09-30

申请人： John A. Fee ,  Shoa-Kai Liu ,  Andrew Niall Robinson ,  Reddy Urimindi

发明人： John A. Fee ,  Shoa-Kai Liu ,  Andrew Niall Robinson ,  Reddy Urimindi

IPC分类号： G02B6/35 ,  G02B6/43 ,  H04B10/17 ,  H04Q11/00 ,  H04B10/00 ,  H04J14/08

CPC分类号： H04B10/2933 ,  H04Q11/0005 ,  G02B6/43 ,  H04Q2011/0049 ,  H04Q2011/0079

摘要： An optical interface device dynamically reconfigures a telecommunications network. The device includes an optically switched backplane connected between two stages of an optical tapped amplifier. Various modules may be plugged into the backplane for performing selective processing of the optical signal without any signal conversion to electrical domain. The modules are electrically controlled by a controller, which is also a module, overseeing the operations upon the optical signal by other modules.

摘要翻译： 光接口设备动态地重新配置电信网络。 该装置包括连接在光学抽头放大器的两级之间的光学开关背板。 可以将各种模块插入背板中，以执行光信号的选择性处理，而无需任何信号转换到电域。 模块由控制器电控制，控制器也是一个模块，监控其他模块对光信号的操作。