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    Skew compensation across polarized optical channels
    3.
    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
    4.
    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
    5.
    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。

    Universal digital framer architecture for transport of client signals of any client payload and format type
    8.
    发明授权
    Universal digital framer architecture for transport of client signals of any client payload and format type 有权
    用于传输任何客户端有效载荷和格式类型的客户端信号的通用数字成帧器架构

    公开(公告)号：US08274892B2

    公开(公告)日：2012-09-25

    申请号：US11154455

    申请日：2005-06-16

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

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

    IPC: H04L12/26

    CPC classification number: H04J3/1652 ,  H04J3/08 ,  H04J3/14

    Abstract: A transmission network includes network elements which accept client signals to be transported over a transmission network, particularly an optical transmission network, each of the client signals having one of a plurality of payload rates. The client signals are digitally mapped into first transport frames and, subsequently, digitally mapped into second transport frames for transport across the network infrastructure. The second transport frames having a universal frame rate throughout the transmission network infrastructure supporting a client signal of any frequency, whether the client signal includes a standard client payload or a proprietary client payload.

    Abstract translation: 传输网络包括接收客户信号通过传输网络，特别是光传输网络传输的网络元件，每个客户端信号具有多个有效载荷率中的一个。 客户端信号被数字地映射到第一传输帧中，并且随后被数字地映射到第二传输帧中以便跨网络基础设施进行传输。 第二传输帧具有在支持任何频率的客户端信号的整个传输网络基础设施中的通用帧速率，无论客户端信号是否包括标准客户端有效载荷或专有客户机有效载荷。

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