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    Passive optical network with asymmetric modulation scheme
    1.
    发明授权
    Passive optical network with asymmetric modulation scheme 有权
    无源光网络采用非对称调制方案

    公开(公告)号：US08320760B1

    公开(公告)日：2012-11-27

    申请号：US13288555

    申请日：2011-11-03

    申请人： Cedric F. Lam ,  Hong Liu ,  Ryohei Urata

    发明人： Cedric F. Lam ,  Hong Liu ,  Ryohei Urata

    IPC分类号： H04J14/00

    CPC分类号： H04J14/002 ,  H04J14/0257 ,  H04J14/0282

    摘要： A passive optical network couples a WDM optical line terminal (“OLT”) to WDM optical network units (“ONUs”). The WDM OLT includes an optical transmitter array with coherent transmitters to generate downstream WDM signals encoded using phase modulation, an optical receiver array with direct detection photo-detectors to receive upstream WDM signals encoded with amplitude modulation, and an optical diplexer optically coupled to the optical transmitter array and the optical receiver array. The WDM ONU includes a tunable optical transmitter having a first tunable laser source coupled to generate a selectable upstream carrier wavelength and direct amplitude modulation circuitry coupled to amplitude modulate the first tunable laser source and a tunable optical receiver having coherent detection circuitry to demodulate phase information from the downstream WDM signals and a second tunable laser source operated as a local oscillator and coupled to tune to a selectable downstream carrier wavelength.

    摘要翻译： 无源光网络将WDM光线路终端（OLT）耦合到WDM光网络单元（ONU）。 WDM OLT包括具有相干发射机的光发射机阵列以产生使用相位调制编码的下行WDM信号，具有直接检测光检测器的光接收器阵列以接收以幅度调制编码的上行WDM信号，以及与光学耦合的光双工器 发射器阵列和光接收器阵列。 WDM ONU包括可调光发射机，其具有耦合以产生可选择的上行载波波长的第一可调谐激光源和耦合到幅度调制第一可调谐激光源的直接幅度调制电路，以及具有相干检测电路的可调谐光学接收器，以从 下游WDM信号和作为本地振荡器操作的第二可调谐激光源，并被耦合以调谐到可选择的下行载波波长。

    Hybrid WDM-TDM passive optical network
    2.
    发明授权
    Hybrid WDM-TDM passive optical network 有权
    混合WDM-TDM无源光网络

    公开(公告)号：US08953942B1

    公开(公告)日：2015-02-10

    申请号：US13458360

    申请日：2012-04-27

    申请人： Cedric F. Lam ,  Ryohei Urata ,  Hong Liu ,  Yut Loy Chan

    发明人： Cedric F. Lam ,  Ryohei Urata ,  Hong Liu ,  Yut Loy Chan

    IPC分类号： H04J14/00 ,  H04J14/08

    CPC分类号： H04J14/0282 ,  H04J14/0256

    摘要： A technique for providing time division multiplexing (“TDM”) and wavelength division multiplexing (“WDM”) communication services to customer premises (“CP”) over a passive optical network (“PON”) includes multiplexing a downstream TDM signal with downstream WDM signals onto a fiber trunk line coupled between a central office and a remote node (“RN”), separating the downstream WDM signals from the downstream TDM signal at the RN with a wavelength selective filter, power splitting the downstream TDM signal at the RN onto a plurality of fiber access lines as split TDM signals; and recombining each of the WDM signals with a corresponding one of the split TDM signals onto a corresponding one of the fiber access lines.

    摘要翻译： 通过无源光网络（“PON”）向客户驻地（“CP”）提供时分多路复用（“TDM”）和波分复用（“WDM”）通信服务的技术包括将下游TDM信号与下行WDM 信号到耦合在中心局和远程节点（“RN”）之间的光纤干线上，用下行WDM信号与RN处的下行TDM信号用波长选择滤波器分离，将RN处的下行TDM信号分解功率 多个光纤接入线作为分离TDM信号; 以及将每个所述WDM信号与所述分离的TDM信号中的相应一个信号重新组合到相应的所述光纤接入线路中。

    Fiber diagnosis system for WDM optical access networks
    3.
    发明授权
    Fiber diagnosis system for WDM optical access networks 有权
    WDM光接入网络的光纤诊断系统

    公开(公告)号：US08693866B1

    公开(公告)日：2014-04-08

    申请号：US13355233

    申请日：2012-01-20

    申请人： Cedric F. Lam ,  Ben W. Segura ,  Ryohei Urata ,  Hong Liu

    发明人： Cedric F. Lam ,  Ben W. Segura ,  Ryohei Urata ,  Hong Liu

    IPC分类号： H04B10/00

    CPC分类号： H04B10/071 ,  H04Q11/0067 ,  H04Q2011/0083

    摘要： A technique for detecting a fiber fault in a WDM optical access network includes launching a test signal into a fiber trunk line linking a central office (“CO”) to a remote node (“RN”) of the WDM optical access network. The test signal is generated by an optical time domain reflectometry unit to simultaneously fault test fiber access lines linking the RN to customer premises. The test signal is separated from downstream WDM signals at the RN. The test signal is power split at the RN into a plurality of access line test signals. The access line test signals are each recombined with a corresponding one of the downstream WDM signals onto a corresponding one of the fiber access lines. Test signal reflections are received at the CO from the fiber access lines as a reflection signature and analyzed to identify a location of the fiber fault.

    摘要翻译： 一种用于检测WDM光接入网络中的光纤故障的技术包括将测试信号发射到连接WDM光接入网络的中心局（“CO”）到远程节点（“RN”）的光纤干线。 测试信号由光时域反射测量单元产生，以同时故障测试将RN连接到客户驻地的光纤接入线路。 测试信号与RN处的下行WDM信号分离。 测试信号在RN处被分配成多个接入线测试信号。 接入线路测试信号各自与下行WDM信号中的相应一个信号复合到相应的一条光纤接入线路上。 在来自光纤接入线路的CO处接收到测试信号反射作为反射特征，并进行分析以识别光纤故障的位置。

    Migratable wavelength division multiplexing passive optical network
    5.
    发明授权
    Migratable wavelength division multiplexing passive optical network 有权
    可移动波分复用无源光网络

    公开(公告)号：US08781322B2

    公开(公告)日：2014-07-15

    申请号：US13205055

    申请日：2011-08-08

    申请人： Cedric F. Lam ,  Hong Liu

    发明人： Cedric F. Lam ,  Hong Liu

    IPC分类号： H04J14/00

    CPC分类号： H04J14/0282 ,  H04J14/0232 ,  H04J14/0235 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0265

    摘要： A hybrid passive optical network (“PON”) includes a time-division multiplexing (“TDM”) optical line terminal (“OLT”) and a wavelength-division multiplexing (“WDM”) OLT. The TDM OLT communicates with a first group of customer premises (“CPs”) via TDM signals while the WDM OLT communicates with a second group of CPs via WDM signals. A remote node power splitter is coupled to receive the TDM and WDM signals and broadcast both the TDM signals and the WDM signals on all of its ports facing towards the CPs. Optical filters are disposed between the remote node power splitter and the second group of CPs. Each optical filter is configured to pass a sub-group of the WDM signals while blocking other WDM signals such that each of the second group of CPs receives its own allocation of WDM signals but does not receive WDM signals allocated to other CPs of the second group of CPs.

    摘要翻译： 混合无源光网络（“PON”）包括时分复用（“TDM”）光线路终端（“OLT”）和波分复用（“WDM”）OLT。 TDM OLT经由TDM信号与第一组客户端（“CP”）通信，而WDM OLT经由WDM信号与第二组CPC通信。 远程节点功率分配器被耦合以接收TDM和WDM信号，并且在其面向CP的所有端口上广播TDM信号和WDM信号。 光学滤波器设置在远程节点功率分配器和第二组CP之间。 每个滤光器被配置成通过WDM信号的子组同时阻挡其它WDM信号，使得第二组CP中的每一个接收到其自己的WDM信号分配，但是不接收分配给第二组的其他CP的WDM信号 的CP。

    MIGRATABLE WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK
    8.
    发明申请
    MIGRATABLE WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK 有权
    可迁移的波长部分多路复用被动光网络

    公开(公告)号：US20130039656A1

    公开(公告)日：2013-02-14

    申请号：US13205055

    申请日：2011-08-08

    申请人： Cedric F. Lam ,  Hong Liu

    发明人： Cedric F. Lam ,  Hong Liu

    IPC分类号： H04J14/00 ,  H04J14/02

    CPC分类号： H04J14/0282 ,  H04J14/0232 ,  H04J14/0235 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/0265

    摘要： A hybrid passive optical network (“PON”) includes a time-division multiplexing (“TDM”) optical line terminal (“OLT”) and a wavelength-division multiplexing (“WDM”) OLT. The TDM OLT communicates with a first group of customer premises (“CPs”) via TDM signals while the WDM OLT communicates with a second group of CPs via WDM signals. A remote node power splitter is coupled to receive the TDM and WDM signals and broadcast both the TDM signals and the WDM signals on all of its ports facing towards the CPs. Optical filters are disposed between the remote node power splitter and the second group of CPs. Each optical filter is configured to pass a sub-group of the WDM signals while blocking other WDM signals such that each of the second group of CPs receives its own allocation of WDM signals but does not receive WDM signals allocated to other CPs of the second group of CPs.

    摘要翻译： 混合无源光网络（PON）包括时分复用（TDM）光线路终端（OLT）和波分复用（WDM）OLT。 TDM OLT通过TDM信号与第一组客户端（CP）通信，而WDM OLT经由WDM信号与第二组CPC通信。 远程节点功率分配器被耦合以接收TDM和WDM信号，并且在其面向CP的所有端口上广播TDM信号和WDM信号。 光学滤波器设置在远程节点功率分配器和第二组CP之间。 每个滤光器被配置成通过WDM信号的子组同时阻挡其它WDM信号，使得第二组CP中的每一个接收到其自己的WDM信号分配，但是不接收分配给第二组的其他CP的WDM信号 的CP。

    Aggregation and de-agreggation of bandwidth within data centers using passive optical elements
    10.
    发明授权
    Aggregation and de-agreggation of bandwidth within data centers using passive optical elements 有权
    使用无源光学元件的数据中心内的带宽的聚合和解聚

    公开(公告)号：US09225454B1

    公开(公告)日：2015-12-29

    申请号：US13282229

    申请日：2011-10-26

    申请人： Hong Liu ,  Amin Vahdat ,  Ryohei Urata ,  Xiaoxue Zhao ,  Chris Johnson

    发明人： Hong Liu ,  Amin Vahdat ,  Ryohei Urata ,  Xiaoxue Zhao ,  Chris Johnson

    IPC分类号： H04J14/02

    CPC分类号： H04J14/02

    摘要： The specification describes an apparatus including a plurality of communication ports, each communication port coupled to a corresponding networking element, and a plurality of optical transceivers, each optical transceiver coupled to a corresponding communication port and including an optical receiver and an optical transmitter, wherein the optical transmitter can transmit an optical data signal having a carrier wavelength different than any other of the plurality of optical transmitters. A passive optical multiplexer/demultiplexer module is coupled to the transceivers and includes an optical multiplexer including a wavelength division multiplexing (WDM) output and a plurality of inputs, each input coupled to one of the plurality of transmitters, and an optical demultiplexer including a WDM input and a plurality of outputs, each output coupled to one of the plurality of receivers. Placing the passive optical multiplexer and demultiplexer external to the optical transceivers creates an aggregation/de-aggregation point with extremely low fault probability.

    摘要翻译： 本说明书描述了一种包括多个通信端口，耦合到对应的网络元件的每个通信端口和多个光收发器的设备，每个光收发器耦合到对应的通信端口并且包括光接收器和光发射器，其中， 光发射机可以发射具有不同于多个光发射机中任何其它的载波波长的光数据信号。 无源光复用器/解复用器模块耦合到收发器，并且包括光复用器，其包括波分多路复用（WDM）输出和多个输入，每个输入耦合到所述多个发射机之一，以及光解复用器，包括WDM 输入和多个输出，每个输出耦合到所述多个接收器中的一个。 将无源光复用器和解复用器放置在光收发器外部，创建具有极低故障概率的聚合/解聚合点。