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1. 发明授权

US07362979B2 Apparatus and method for duobinary transmission 失效
标题翻译：二元传输装置及方法
公开(公告)号：US07362979B2
公开(公告)日：2008-04-22
申请号：US10355583
申请日：2003-01-31
申请人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
发明人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
IPC分类号： H04B10/12 , H04B10/04
CPC分类号： H04B10/508 , H04B10/505
摘要： An apparatus and method are provided for transmitting an optical duobinary signal using a low bandwidth modulator having a bandwidth of less than about 60% of the transmission bit rate of the transmitter. The modulator is adapted to provide low pass filtering for low pass filtered duobinary transmission in an optical fiber transmission system having residual dispersion.
摘要翻译：提供一种装置和方法，用于使用具有小于发射机的传输比特率的约60％的带宽的低带宽调制器来发送光学双二进制信号。调制器适于在具有残余色散的光纤传输系统中为低通滤波的双二进制传输提供低通滤波。

2. 发明授权

US07362980B2 Duobinary transmission system and method 失效
标题翻译：二元传输系统及方法
公开(公告)号：US07362980B2
公开(公告)日：2008-04-22
申请号：US10356203
申请日：2003-01-31
申请人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
发明人： Douglas M. Gill , David S. Levy , Xiang Liu , Moncef B. Tayahi , Xing Wei
IPC分类号： H04B10/12 , H04B10/04
CPC分类号： H04B10/508 , H04B10/505
摘要： An optical duobinary transmission system and method are provided for transmitting optical duobinary signals across an optical transmission link having residual dispersion. The system includes a transmitter having a low bandwidth modulator, adapted to provide filtering for low pass filtered duobinary transmission. The transmission link is designed such that the residual dispersion of the transmission link substantially compensates for signal distortion from the transmitter.
摘要翻译：提供了一种用于在具有残余色散的光传输链路上传输光双二进制信号的光双二进制传输系统和方法。该系统包括具有低带宽调制器的发射机，适于对低通滤波的双二进制传输提供滤波。传输链路被设计成使得传输链路的残余色散基本上补偿来自发射机的信号失真。

3. 发明授权

US07409121B2 Integrateable optical interleaver and de-interleaver 失效
标题翻译：可整合光交织器和解交织器
公开(公告)号：US07409121B2
公开(公告)日：2008-08-05
申请号：US11565338
申请日：2006-11-30
申请人： Christopher Richard Doerr , David S. Levy
发明人： Christopher Richard Doerr , David S. Levy
IPC分类号： G02B6/12 , G02B6/26
CPC分类号： G02B6/12021 , H04J14/0204 , H04J14/0206 , H04J14/0208 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0219 , H04J14/0221
摘要： A proposed integrateable optical interleaver includes an input Y-branch coupler and at least two multi-section optical couplers. The multi-section optical couplers of the interleaver include at least three substantially similar optical couplers, adjacent ones of the optical couplers interconnected via at least one set of waveguides. The interleaver of the present invention comprises a highly compact and fabrication-robust form that is capable of being integrated onto a single planar lightwave circuit.
摘要翻译：所提出的可组合光交错器包括输入Y分支耦合器和至少两个多段光耦合器。交织器的多段光耦合器包括至少三个基本相似的光耦合器，通过至少一组波导互连的相邻光耦合器中的相邻光耦合器。本发明的交织器包括能够集成到单个平面光波电路上的高度紧凑且制造稳健的形式。

4. 发明授权

US07099582B2 Method and apparatus for multi-protocol and multi-rate optical channel performance monitoring 有权
标题翻译：多协议和多速率光通道性能监控的方法和装置
公开(公告)号：US07099582B2
公开(公告)日：2006-08-29
申请号：US10160596
申请日：2002-05-31
申请人： Chedley Belhadj-Yahya , David S. Levy
发明人： Chedley Belhadj-Yahya , David S. Levy
IPC分类号： H04B10/08
CPC分类号： H04J14/02 , H04B10/07953
摘要： A method and apparatus for optical performance monitoring that provides for multi-rate and multi-protocol monitoring includes, identifying a protocol associated with each of a plurality of communication signals using respective data rates extracted therefrom, determining, for each of the plurality of communication signals, a respective bit-error rate (BER), and generating an alarm indicative of BER excursions beyond a protocol appropriate BER threshold level.
摘要翻译：一种用于提供多速率和多协议监测的光学性能监测的方法和装置包括：使用从其提取的相应数据速率来识别与多个通信信号中的每一个相关联的协议，为每个多个通信信号，相应的比特误码率（BER），并且产生指示超出协议适当BER阈值水平的BER偏移的报警。

5. 发明授权

US06721502B1 Shared optical protection ring architecture 失效
标题翻译：共享光保护环架构
公开(公告)号：US06721502B1
公开(公告)日：2004-04-13
申请号：US09675733
申请日：2000-09-30
申请人： Daniel Y. Al-Salameh , Donald L. Husa , David S. Levy , Timothy O. Murphy , Gaylord W. Richards
发明人： Daniel Y. Al-Salameh , Donald L. Husa , David S. Levy , Timothy O. Murphy , Gaylord W. Richards
IPC分类号： G02F100
CPC分类号： H04J14/0227 , H04J14/0241 , H04J14/0283 , H04J14/0294 , H04J14/0295
摘要： An optical transmission system formed from a plurality of nodes interconnected in a ring configuration via at least two transmission media provides protection capacity for each optical channel. If a channel signal does not meet predetermined criteria, then a loss of signal indication is declared for the channel and one of a plurality of protection switching states is invoked to re-route service traffic carried by the impaired channel to its destination via corresponding protection capacity. The switching states include particular transmission states and at least “keep-alive” and “protection access” states.
摘要翻译：由通过至少两个传输介质以环形配置互连的多个节点形成的光传输系统为每个光信道提供保护容量。如果信道信号不符合预定标准，则声明信道丢失信号，并且调用多个保护倒换状态中的一个保护切换状态，以通过相应的保护容量将受损信道携带的业务业务重新路由到其目的地。切换状态包括特定的传输状态和至少“保持活动”和“保护访问”状态。

6. 发明授权

US08305881B2 Method and system for maximizing wavelength reuse in optically protected WDM networks 有权
标题翻译：用于在光学保护的WDM网络中最大化波长重用的方法和系统
公开(公告)号：US08305881B2
公开(公告)日：2012-11-06
申请号：US10919618
申请日：2004-08-17
申请人： Robert S. Harby , David S. Levy , Dat D. Ngo , James Dorian Sandoz , Charles Small
发明人： Robert S. Harby , David S. Levy , Dat D. Ngo , James Dorian Sandoz , Charles Small
IPC分类号： H04B10/17 , H04B10/08 , H04B10/12 , H04J14/02
CPC分类号： H04J14/0227 , H04J3/085 , H04J3/14 , H04J14/0226 , H04J14/0241 , H04J14/0246 , H04J14/0247 , H04J14/0283 , H04J14/0295
摘要： A method and system for maximizing wavelength reuse in an optically protected wavelength-division-multiplexed (WDM) network, the WDM network supporting a plurality of service connections, includes associating service connections supported by non-overlapping paths to form respective service channel groups, and for each service channel group, assigning at least one common wavelength channel for establishing the service connections. In addition, for each of said groups, at least one common wavelength channel is assigned for establishing a shared protection path for the service connections of each of said groups. In addition, the wavelength channels assigned for establishing the shared protection paths for each of the groups may be used for providing service connections for the WDM network when not in use as shared protection paths. However such provisional service connections are dropped when the wavelength channels are needed to establish shared protection paths. Such provisional service connections may be offered at reduced cost.
摘要翻译：一种用于在光保护的波分复用（WDM）网络中支持多个服务连接的WDM网络中最大化波长重用的方法和系统包括：将由非重叠路径支持的服务连接相关联以形成相应的服务信道组，以及对于每个服务信道组，分配用于建立服务连接的至少一个公共波长信道。此外，对于每个所述组，分配至少一个公共波长信道以建立用于每个所述组的服务连接的共享保护路径。此外，分配用于为每个组建立共享保护路径的波长信道可用于在不用作共享保护路径时为WDM网络提供服务连接。然而，当需要波长信道来建立共享保护路径时，这种临时业务连接被丢弃。这样的临时服务连接可以以降低的成本提供。

7. 发明授权

US07155123B2 Method and apparatus for locating faults in an optical network 有权
公开(公告)号：US07155123B2
公开(公告)日：2006-12-26
申请号：US10142475
申请日：2002-05-10
申请人： David S. Levy , Peter H. Mitev
发明人： David S. Levy , Peter H. Mitev
IPC分类号： H04B10/08
CPC分类号： H04B10/07 , H04B10/0791 , H04B10/0793 , H04B10/07953
摘要： Method and apparatus for fault localization in an optical network using time trend correlation of end node performance parameters and intermediate node performance parameters, such as QoS and quasi-Q factors, respectively. The method and apparatus are bit-rate and protocol independent, enabling testing for each channel of a diverse dense wavelength division multiplexed traffic system using a single set of hardware.

8. 发明授权

US06792172B1 Reduced size multimode interference based coupler 失效
标题翻译：减少尺寸的多模干扰耦合器
公开(公告)号：US06792172B1
公开(公告)日：2004-09-14
申请号：US09674821
申请日：2001-04-20
申请人： David S. Levy , Robert Scarmozzino , Richard M. Osgood, Jr.
发明人： David S. Levy , Robert Scarmozzino , Richard M. Osgood, Jr.
IPC分类号： G02B626
CPC分类号： G02B6/2813
摘要： The Multimode Interference coupler according to the invention has smoothly continuous inwardly tapered sidewalls (301) which define the width of the multimode region (W1) along the propagation axis of the device. The inward taper causes the average width of the device to be reduced in comparison to known couplers having straight sidewalls (202). Further, invention allows the access waveguides (303, 309) to remain sufficiently spaced, while reducing the overall length of the device, to avoid lithographic gap fill-in and unwanted optical coupling between the waveguides.
摘要翻译：根据本发明的多模干涉耦合器具有沿着装置的传播轴限定多模区域（W1）的宽度的平滑连续向内渐缩的侧壁（301）。与已知具有直的侧壁（202）的联接器相比，向内的锥形导致装置的平均宽度减小。此外，本发明允许接入波导（303,309）保持足够的间隔，同时减少器件的总长度，以避免波导之间的光刻间隙填充和不期望的光耦合。

9. 发明授权

US07171116B2 Provisionable keep-alive signal for physical-layer protection of an optical network 有权
标题翻译：可配置的保持活动信号，用于光网络的物理层保护
公开(公告)号：US07171116B2
公开(公告)日：2007-01-30
申请号：US10245029
申请日：2002-09-17
申请人： Steven K. Korotky , David S. Levy
发明人： Steven K. Korotky , David S. Levy
IPC分类号： H04B10/00
CPC分类号： H04J14/0294 , H04B10/505 , H04B10/5053 , H04J14/0283 , H04J14/0284
摘要： A dual-output Mach-Zehnder modulator (MZM2) and configurations of optical transmitters based on the MZM2 which obviate the optical splitter that is typically used to provide keep-alive functionality in redundantly-connected, protected optical networks, SONET add-drop multiplexers, and optical IP routers. The configurations provide equivalent keep-alive utility at a reduced system cost relative to the prior art. The configurations also support enhanced Operations, Administration, Maintenance, and Provisioning (OAM&P) functionality at little to no additional cost relative to the prior art. Instead of being a direct copy of the service signal, the keep-alive of this configuration is an inverted version of the service signal. This inverted version of the service signal is supported at a client by utilization of means for detecting and righting the inverted signal. The inverted state of the signal on the protection path can be used as an inband indicator to notify the client in the event of a failure on the service path. This inband indicator requires little or no additional circuitry to accommodate. Another aspect of this invention allows the provisionable substitution of the inverted signal with a preemptive signal to support low-priority traffic when there is no fault on the service path S.
摘要翻译：双输出马赫 - 曾德尔调制器（MZM2）以及基于MZM2的光发射机的配置，可消除通常用于在冗余连接的保护光网络中提供保持功能的光分路器，SONET分插复用器，和光IP路由器。这些配置相对于现有技术以降低的系统成本提供等效的保活实用程序。这些配置还支持增强的操作，管理，维护和配置（OAM＆P）功能，相对于现有技术几乎没有额外的成本。代替服务信号的直接副本，这种配置的保持是服务信号的反转版本。通过利用用于检测和校正反相信号的装置，在客户端支持服务信号的这种反向版本。保护路径上的信号的反转状态可以用作带内指示器，以在服务路径发生故障的情况下通知客户端。该带内指示器需要很少的或不需要额外的电路来容纳。本发明的另一方面允许在服务路径S上没有故障的情况下，使用抢占信号来替换反向信号以支持低优先级业务。

10. 发明授权

US07171067B2 Integrateable optical interleaver and de-interleaver 失效
标题翻译：可整合光交织器和解交织器
公开(公告)号：US07171067B2
公开(公告)日：2007-01-30
申请号：US10657862
申请日：2003-09-09
申请人： Christopher Richard Doerr , David S. Levy
发明人： Christopher Richard Doerr , David S. Levy
IPC分类号： G02B6/26 , G02B6/12
CPC分类号： G02B6/12021 , H04J14/0204 , H04J14/0206 , H04J14/0208 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0219 , H04J14/0221
摘要： A proposed integrateable optical interleaver includes an input Y-branch coupler and at least two multi-section optical couplers. The multi-section optical couplers of the interleaver include at least three substantially similar optical couplers, adjacent ones of the optical couplers interconnected via at least one set of waveguides. The interleaver of the present invention comprises a highly compact and fabrication-robust form that is capable of being integrated onto a single planar lightwave circuit.
摘要翻译：所提出的可组合光交错器包括输入Y分支耦合器和至少两个多段光耦合器。交织器的多段光耦合器包括至少三个基本相似的光耦合器，通过至少一组波导互连的相邻光耦合器中的相邻光耦合器。本发明的交织器包括能够集成到单个平面光波电路上的高度紧凑且制造稳健的形式。

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