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    Reconfigurable branching unit for submarine optical communication networks
    1.
    发明授权
    Reconfigurable branching unit for submarine optical communication networks 有权
    用于海底光通信网络的可重构分支单元

    公开(公告)号：US09106983B2

    公开(公告)日：2015-08-11

    申请号：US13855384

    申请日：2013-04-02

    Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

    Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

    IPC: H04Q11/00 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28

    CPC classification number: H04Q11/0005 ,  H04L12/28 ,  H04Q11/00 ,  H04Q2011/0016

    Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), and the input signal is split into at least two parts, with one part being associated with one or more trunk terminals and another part being associated with one or more branch terminals. Each of one or more spectrum channels are selected and individually switched to one of a plurality of paths using at least one wavelength selective switch (WSS), with the at least one WSS being configured to transmit the one or more spectrum channels to their respective target output port and to combine signals switched to a specific port into a wavelength division multiplexing (WDM) signal. Individual spectrum channels are filtered out using at least one wavelength blocker (WB).

    Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，并且将输入信号分成至少两部分，其中一部分与一个或多个中继终端相关联，另一部分与一个或多个分支 终端。 使用至少一个波长选择开关（WSS）来选择一个或多个频谱信道中的每一个并且单独地切换到多个路径中的一个，其中所述至少一个WSS被配置为将一个或多个频谱信道发送到它们各自的目标 输出端口并将切换到特定端口的信号组合成波分复用（WDM）信号。 使用至少一个波长阻挡器（WB）滤除各个频谱通道。

    WAVELENGTH DIVISION MULTIPLEXING SYSTEM AND METHOD INCLUDING WAVELENGTH MONITORING
    5.
    发明申请
    WAVELENGTH DIVISION MULTIPLEXING SYSTEM AND METHOD INCLUDING WAVELENGTH MONITORING 有权
    波长分割多路复用系统和包括波长监测的方法

    公开(公告)号：US20160028504A1

    公开(公告)日：2016-01-28

    申请号：US14807446

    申请日：2015-07-23

    Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

    Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata

    IPC: H04J14/02 ,  H04B10/079

    CPC classification number: H04B10/07957 ,  H04B10/07955 ,  H04J14/0221

    Abstract: A wavelength division multiplexing system and method featuring a wavelength monitor that is configured to receive a portion of a combined signal of wavelength division multiplexing channels and determine the wavelengths of each channel or the guardband between each channel in the combined signal. The wavelength monitor determines if there is excess laser drift for each channel in the combined signal. If excess laser drift is determined, feedback is sent to the transmitter for the signal with excess laser drift and the signal is adjusted to produce a target wavelength. The wavelength monitor may utilize optical intradyning in order to monitor the wavelengths of each channel in the combined signal.

    Abstract translation: 一种波分复用系统和方法，其特征在于波长监视器被配置为接收波分复用信道的组合信号的一部分，并确定组合信号中每个信道之间的每个信道或保护带的波长。 波长监测器确定组合信号中每个通道是否存在过多的激光漂移。 如果确定了多余的激光漂移，则将反馈发送到具有过多激光漂移的信号的发射机，并且调整信号以产生目标波长。 波长监视器可以利用光学缓冲来监视组合信号中每个通道的波长。

    Reconfigurable branching unit for submarine optical communication networks
    7.
    发明授权
    Reconfigurable branching unit for submarine optical communication networks 有权
    用于海底光通信网络的可重构分支单元

    公开(公告)号：US08989197B2

    公开(公告)日：2015-03-24

    申请号：US13855446

    申请日：2013-04-02

    Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

    Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

    IPC: H04L12/28 ,  H04Q11/00

    CPC classification number: H04Q11/0005 ,  H04L12/28 ,  H04Q11/00 ,  H04Q2011/0016

    Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), wherein the BU enables bidirectional transmission between any two terminals, and the input signal is demultiplexed into at least one individual waveband or wavelength using at least one demultiplexer. Each demultiplexed waveband is passed through optical switches, with corresponding optical switches for the same demultiplexed waveband provided for transmission in the reverse direction. Independent per-waveband switching is performed using a demultiplexer-switch-multiplexer (DSM) architecture. Each demultiplexed waveband is multiplexed at each output port using at least one multiplexer to combine signals from different sources, and combined signals are transmitted to a destination terminal.

    Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，其中BU使能任何两个终端之间的双向传输，并且使用至少一个解复用器将输入信号解复用为至少一个单独的波段或波长。 每个解复用的波段通过光开关，其中相应的光开关用于相反的解复用波段，用于反向传输。 使用解复用器 - 开关多路复用器（DSM）架构来执行独立的每波段切换。 每个解复用波段在每个输出端口使用至少一个多路复用器进行多路复用以组合来自不同源的信号，并且组合信号被发送到目的地终端。

    RECONFIGURABLE BRANCHING UNIT FOR SUBMARINE OPTICAL COMMUNICATION NETWORKS
    8.
    发明申请
    RECONFIGURABLE BRANCHING UNIT FOR SUBMARINE OPTICAL COMMUNICATION NETWORKS 有权
    用于子光通信网络的可重新分配单元

    公开(公告)号：US20130259055A1

    公开(公告)日：2013-10-03

    申请号：US13855446

    申请日：2013-04-02

    Applicant: NEC LABORATORIES AMERICA, INC. ,  NEC CORPORATION

    Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

    IPC: H04Q11/00

    CPC classification number: H04Q11/0005 ,  H04L12/28 ,  H04Q11/00 ,  H04Q2011/0016

    Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), wherein the BU enables bidirectional transmission between any two terminals, and the input signal is demultiplexed into at least one individual waveband or wavelength using at least one demultiplexer. Each demultiplexed waveband is passed through optical switches, with corresponding optical switches for the same demultiplexed waveband provided for transmission in the reverse direction. Independent per-waveband switching is performed using a demultiplexer-switch-multiplexer (DSM) architecture. Each demultiplexed waveband is multiplexed at each output port using at least one multiplexer to combine signals from different sources, and combined signals are transmitted to a destination terminal.

    Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，其中BU使能任何两个终端之间的双向传输，并且使用至少一个解复用器将输入信号解复用为至少一个单独的波段或波长。 每个解复用的波段通过光开关，其中相应的光开关用于相反的解复用波段，用于反向传输。 使用解复用器 - 开关多路复用器（DSM）架构来执行独立的每波段切换。 每个解复用波段在每个输出端口使用至少一个多路复用器进行多路复用以组合来自不同源的信号，并且组合信号被发送到目的地终端。

    Polarization Switching for Optical Fiber Communications
    9.
    发明申请
    Polarization Switching for Optical Fiber Communications 有权
    光纤通信的极化切换

    公开(公告)号：US20130089327A1

    公开(公告)日：2013-04-11

    申请号：US13649161

    申请日：2012-10-11

    Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

    Inventor： Shaoliang Zhang ,  Lei Xu ,  Junqiang Hu ,  Fatih Yaman ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

    IPC: H04J14/06 ,  H04J14/08

    CPC classification number: H04B10/5055 ,  H04B10/5561 ,  H04J14/06

    Abstract: A method implemented in a transmission apparatus used in an optical fiber communications system for a polarization switched differential quaternary phase-shift keying (DQPSK) signal is disclosed. The method comprises splitting data into two or more data streams, inputting said two or more data streams to 1-bit DQPSK precoders to perform 1-bit DQPSK precoding, and multiplexing inphase outputs of the 1-bit DQPSK precoders to generate a first output; and multiplexing quadrature outputs of the 1-bit DQPSK precoders to generate a second output. Other methods, apparatuses, and systems also are disclosed.

    Abstract translation: 公开了一种在用于偏振切换差分四相移键控（DQPSK）信号的光纤通信系统中使用的发送装置中实现的方法。 该方法包括将数据分成两个或更多个数据流，将所述两个或多个数据流输入到1比特DQPSK预编码器以执行1比特DQPSK预编码，以及复用1比特DQPSK预编码器的同相输出以产生第一输出; 以及复用1位DQPSK预编码器的正交输出以产生第二输出。 还公开了其它方法，装置和系统。

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