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    Skew compensation across polarized optical channels
    1.
    发明授权
    Skew compensation across polarized optical channels 有权
    偏振光通道偏移补偿

    公开(公告)号：US08249463B2

    公开(公告)日：2012-08-21

    申请号：US11952687

    申请日：2007-12-07

    Applicant: Drew D. Perkins

    Inventor： Drew D. Perkins

    IPC: H04B10/00

    CPC classification number: H04B10/676 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/532 ,  H04B10/697

    Abstract: Embodiments of the present invention provide systems, devices and methods for managing skew within a polarized multi-channel optical transport system. In a DP-QPSK system, skew between polarized channels is compensated within the transport system by adding latency to at least one of the polarized channels. The amount of added latency may depend on various factors including the skew tolerance of the transport system and the amount of skew across the channels without compensation. This latency may be added optically or electrically, and at various locations on a channel signal path within a transport node, such as a terminal transmitter or receiver. Additionally, various embodiments of the invention provide for novel methods of inserting frame alignment bit sequences within the transport frame overhead so that alignment and skew compensation may be more efficiently and accurately performed at the transport receiver.

    Abstract translation: 本发明的实施例提供了一种用于管理偏振多通道光传输系统内的偏斜的系统，装置和方法。 在DP-QPSK系统中，通过向至少一个极化信道增加等待时间，在传输系统内补偿极化信道之间的偏斜。 增加的等待时间的数量可能取决于各种因素，包括传输系统的偏斜容限和跨越通道的偏移量，无需补偿。 这种延迟可以光传输或电气地以及传输节点内诸如终端发射机或接收机之间的信道信号路径上的各个位置。 此外，本发明的各种实施例提供了在传输帧开销内插入帧对准比特序列的新颖方法，使得可以在传输接收机处更有效和更准确地执行对准和偏斜补偿。

    COOLERLESS PHOTONIC INTEGRATED CIRCUITS (PICs) FOR WDM TRANSMISSION NETWORKS AND PICs OPERABLE WITH A FLOATING SIGNAL CHANNEL GRID CHANGING WITH TEMPERATURE BUT WITH FIXED CHANNEL SPACING IN THE FLOATING GRID
    2.
    发明申请
    COOLERLESS PHOTONIC INTEGRATED CIRCUITS (PICs) FOR WDM TRANSMISSION NETWORKS AND PICs OPERABLE WITH A FLOATING SIGNAL CHANNEL GRID CHANGING WITH TEMPERATURE BUT WITH FIXED CHANNEL SPACING IN THE FLOATING GRID 审中-公开
    用于WDM传输网络的无线光电集成电路（PIC）可用于浮动信号通道网格变化与温度变化，但在浮动网格中具有固定通道间隔

    公开(公告)号：US20100166424A1

    公开(公告)日：2010-07-01

    申请号：US12612646

    申请日：2009-11-04

    Applicant: Radhakrishnan L. Nagarajan ,  Fred A. Kish, JR. ,  David F. Welch ,  Drew D. Perkins ,  Masaki Kato

    Inventor： Radhakrishnan L. Nagarajan ,  Fred A. Kish, JR. ,  David F. Welch ,  Drew D. Perkins ,  Masaki Kato

    IPC: H01S3/04 ,  H04J14/02 ,  H04B10/04 ,  H01S5/024

    CPC classification number: G02B6/12033 ,  B82Y20/00 ,  G02B6/12019 ,  G02B6/2813 ,  G02B6/293 ,  G02B6/29317 ,  G02B6/29338 ,  G02B6/29352 ,  H01S5/005 ,  H01S5/0085 ,  H01S5/02248 ,  H01S5/024 ,  H01S5/0261 ,  H01S5/0265 ,  H01S5/0268 ,  H01S5/0683 ,  H01S5/1032 ,  H01S5/12 ,  H01S5/1221 ,  H01S5/2231 ,  H01S5/34306 ,  H01S5/4031 ,  H01S5/4087 ,  H04B10/506

    Abstract: A coolerless photonic integrated circuit (PIC), such as a semiconductor electro-absorption modulator/laser (EML) or a coolerless optical transmitter photonic integrated circuit (TxPIC), may be operated over a wide temperature range at temperatures higher then room temperature without the need for ambient cooling or hermetic packaging. Since there is large scale integration of N optical transmission signal WDM channels on a TxPIC chip, a new DWDM system approach with novel sensing schemes and adaptive algorithms provides intelligent control of the PIC to optimize its performance and to allow optical transmitter and receiver modules in DWDM systems to operate uncooled. Moreover, the wavelength grid of the on-chip channel laser sources may thermally float within a WDM wavelength band where the individual emission wavelengths of the laser sources are not fixed to wavelength peaks along a standardized wavelength grid but rather may move about with changes in ambient temperature. However, control is maintained such that the channel spectral spacing between channels across multiple signal channels, whether such spacing is periodic or aperiodic, between adjacent laser sources in the thermally floating wavelength grid are maintained in a fixed relationship. Means are then provided at an optical receiver to discover and lock onto floating wavelength grid of transmitted WDM signals and thereafter demultiplex the transmitted WDM signals for OE conversion.

    Abstract translation: 诸如半导体电吸收调制器/激光器（EML）或无冷器光发射机光子集成电路（TxPIC）的无冷却光子集成电路（PIC）可以在高于室温的温度范围内工作，而不需要 需要环境冷却或密封包装。 由于在TxPIC芯片上存在N个光传输信号WDM信道的大规模集成，新的具有新型感测方案和自适应算法的DWDM系统方法提供了PIC的智能控制，以优化其性能并允许光发射机和接收机模块在DWDM 系统运行未冷却。 此外，片上通道激光源的波长网格可以在WDM波长带内热漂浮，其中激光源的各个发射波长不沿着标准波长网格固定到波长峰值，而是可以随着环境的变化而移动 温度。 然而，保持控制，使得在热浮动波长网格中的相邻激光源之间跨多个信号通道的信道之间的信道频谱间隔（无论这样的间隔是周期性的还是非周期性的）保持固定的关系。 然后在光接收器处提供装置以发现并锁定发送的WDM信号的浮动波长网格，然后对发送的WDM信号进行解复用以进行OE转换。

    Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same
    3.
    发明授权
    Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same 有权
    光传输网络与异步映射和解映射以及数字包装框架相同

    公开(公告)号：US07684399B2

    公开(公告)日：2010-03-23

    申请号：US11876727

    申请日：2007-10-22

    Applicant: Drew D. Perkins ,  Ting-Kuang Chiang ,  Edward E. Sprague ,  Daniel P. Murphy

    Inventor： Drew D. Perkins ,  Ting-Kuang Chiang ,  Edward E. Sprague ,  Daniel P. Murphy

    IPC: H04L12/28

    CPC classification number: H04L1/0057 ,  H04J3/0691 ,  H04J3/07 ,  H04J3/1611 ,  H04J3/1652 ,  H04J2203/0085

    Abstract: An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as well as signal regeneration. The optical transmission network includes a plesiochronous clocking system with intermediate nodes designed to operate asynchronously with a single local frequency clock without complicated network synchronization schemes employing high cost clocking devices such as phase locked loop (PLL) control with crystal oscillators and other expensive system components. The asynchronous network operation provides for asynchronous remapping or remapping of any client signal utilizing any type of transmission protocol where the line side rate or frequency is always the same frequency for the payload signal and the local frequency at an intermediate node is set to a local reference clock in accordance with the payload type and its overhead ratio, i.e., the overhead ratio is varied to meet the desired difference between the line rate or frequency and the desired client signal payload rate or frequency for the particular client signal payload type.

    Abstract translation: 由于使用可变开销比（V-OHR），光传输网络固有地是异步的。 网络架构广泛使用OEO再生，即处理任何电子修复以校正传输损伤，例如FEC编码，解码和重新编码，信号整形，重新定时以及信号再生。 光传输网络包括一个专用时钟系统，其中间节点设计成与单个本地频率时钟异步运行，而无需采用高成本时钟设备（如晶体振荡器和其他昂贵的系统组件的锁相环（PLL））控制）的复杂网络同步方案。 异步网络操作提供使用任何类型的传输协议的任何客户端信号的异步重映射或重新映射，其中线路边速率或频率对于有效载荷信号总是相同的频率，并且中间节点处的本地频率被设置为本地参考 根据有效载荷类型和其开销比，即，开销比被改变以满足线速率或频率与特定客户端信号有效载荷类型的期望的客户端信号有效载荷速率或频率之间的期望差。

    High-capacity switch
    6.
    发明授权
    High-capacity switch 有权

    公开(公告)号：US09729946B2

    公开(公告)日：2017-08-08

    申请号：US12418283

    申请日：2009-04-03

    Applicant: Drew D. Perkins ,  Ting-Kuang Chiang ,  Curtis Villamizar

    Inventor： Drew D. Perkins ,  Ting-Kuang Chiang ,  Curtis Villamizar

    IPC: H04J14/00 ,  H04Q11/00 ,  H04J14/02

    CPC classification number: H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212 ,  H04J14/0221 ,  H04Q2011/0013 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0032

    Abstract: Consistent with the present disclosure, an optical switch is provided that switches multiple wavelength division multiplexed (WDM) optical signals. Each of the WDM signals includes optical signals having the same wavelengths. The WDM signals are supplied to optical splitters, which supply power split portions of the WDM signals to corresponding optical gates. Groups of the optical gates are associated with a corresponding switching block, which may include a cyclical arrayed waveguide grating (AWG), and the optical gates within each group are controlled so that one gate passes a received WDM signal portion while the remaining optical gates in the group are in a blocking configuration. As a result, the WDM portion received by the non-blocking gate is demultiplexed in the switching block and each of the wavelength components that constitute the selected WDM portion are supplied to corresponding outputs within the switching block. In a later time interval, a different optical gate may be rendered non-blocking so that a different WDM signal portion, supplied from a different optical splitter and carrying different information over the same wavelengths, may be input to the switching block. Thus, by controlling the optical gates, different WDM signal portions may be switched to, and thus demultiplexed by, a particular switching block. In addition, portions of the same WDM signal may be selectively supplied to different AWGs by appropriately control of the optical gates.

    Modular adaptation and configuration of a network node architecture
    7.
    发明授权
    Modular adaptation and configuration of a network node architecture 有权
    网络节点架构的模块化适配和配置

    公开(公告)号：US08442040B2

    公开(公告)日：2013-05-14

    申请号：US11479778

    申请日：2006-06-30

    Applicant: Drew D. Perkins ,  Ting-Kuang Chiang ,  Marco E. Sosa ,  Mark Yin ,  Edward E. Sprague

    Inventor： Drew D. Perkins ,  Ting-Kuang Chiang ,  Marco E. Sosa ,  Mark Yin ,  Edward E. Sprague

    IPC: H04L12/50

    CPC classification number: H04J14/0201 ,  H04J14/0219 ,  H04L49/40 ,  H04L49/405 ,  H04L49/45

    Abstract: The present invention provides a system, apparatus and method for modularly adapting a network node architecture to function in one of a plurality of potential node types. The architecture includes a configurable switching element, integrated optics, and a plurality of modules that allow a “type” of node to be adapted and configured within the base architecture. The module interfaces may be optical or electrical and be used to construct various different types of nodes including regenerators, add/drop nodes, terminal nodes, and multi-way nodes using the same base architecture.

    Abstract translation: 本发明提供了一种用于模块化地适应网络节点体系结构以在多个潜在节点类型之一起作用的系统，装置和方法。 该架构包括可配置的开关元件，集成光学元件和允许在基础架构内适配和配置节点“类型”的多个模块。 模块接口可以是光学的或电的，并且可以用于构造各种不同类型的节点，包括再生器，添加/分出节点，终端节点和使用相同基础架构的多路节点。

    Protection switch decision architecture
    10.
    发明授权
    Protection switch decision architecture 有权
    保护开关决策架构

    公开(公告)号：US07716560B1

    公开(公告)日：2010-05-11

    申请号：US11479047

    申请日：2006-06-30

    Applicant: Edward E. Sprague ,  Marco E. Sosa ,  Daniel P. Murphy ,  Christopher C. Liou ,  Ting-Kuang Chiang ,  Drew D. Perkins

    Inventor： Edward E. Sprague ,  Marco E. Sosa ,  Daniel P. Murphy ,  Christopher C. Liou ,  Ting-Kuang Chiang ,  Drew D. Perkins

    IPC: H03M13/00

    CPC classification number: H04J14/0295 ,  H04J14/0291 ,  H04L1/0045 ,  H04L1/0082 ,  H04L1/22

    Abstract: The present invention provides a system, apparatus and method for accurately identifying optical or digital impairments on a span using FEC errors identified at an intermediary node. This information may be provided to an end node within a network to switch to a redundant path around the impaired optical path or span therein. In one embodiment of the invention, signal degradation is identified by analyzing FEC data within a FEC decoded signal at an intermediary node. An identification of signal degradation provides an indication of a potential failing span within an optical link, which may be provided in-band or out-of-band to a terminal node so that a signal may be switched around a failing path, or span therein, prior to an actual failure event.

    Abstract translation: 本发明提供了一种使用在中间节点识别的FEC错误来精确地识别跨度上的光学或数字损伤的系统，装置和方法。 该信息可以被提供给网络内的终端节点以切换到围绕其中的受损光学路径或跨度的冗余路径。 在本发明的一个实施例中，通过在中间节点的FEC解码信号内分析FEC数据来识别信号劣化。 信号劣化的识别提供了光链路内的潜在故障跨度的指示，其可以向终端节点带内或带外提供，使得信号可以围绕故障路径切换或跨越其中 ，在实际故障事件之前。

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