公开(公告)号：US08457465B1

公开(公告)日：2013-06-04

申请号：US13474305

申请日：2012-05-17

申请人： Ryohei Urata ,  Hong Liu ,  Zuowei Shen

发明人： Ryohei Urata ,  Hong Liu ,  Zuowei Shen

IPC分类号： G02B6/00

CPC分类号： G02B6/262 ,  G02B6/266

摘要： An optical attenuation system that includes first and second attenuators providing different attenuations of corresponding received optical signals. The first attenuator receives an optical signal emitted by a transmitter of a first transceiver and delivers the received optical signal to a receiver of a second transceiver. The second attenuator receives an optical signal emitted by a transmitter of the second transceiver and delivers the received optical signal to a receiver of the first transceiver. A method may include determining first and second optical attenuations for the first and second attenuators, respectively, and for at least one attenuator, arranging a first fiber optic cable having a first core size in series with a second fiber optic cable having a second core size to provide the determined corresponding optical attenuation.

摘要翻译： 一种光衰减系统，其包括提供对应的接收光信号的不同衰减的第一衰减器和第二衰减器。 第一衰减器接收由第一收发器的发射机发射的光信号，并将接收的光信号传送到第二收发器的接收机。 第二衰减器接收由第二收发器的发射机发射的光信号，并将接收到的光信号传送到第一收发器的接收机。 一种方法可以包括分别为第一和第二衰减器以及对于至少一个衰减器确定第一和第二光衰减器，将具有第一纤芯尺寸的第一光纤电缆与具有第二芯尺寸的第二光纤电缆串联布置 以提供确定的相应的光衰减。

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。

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。

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。

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。

公开(公告)号：US08676004B1

公开(公告)日：2014-03-18

申请号：US13402855

申请日：2012-02-22

申请人： Ryohei Urata ,  Leon Poutievski ,  Amin Vahdat ,  Hong Liu ,  Xiaoxue Zhao ,  Cedric Fung Lam

发明人： Ryohei Urata ,  Leon Poutievski ,  Amin Vahdat ,  Hong Liu ,  Xiaoxue Zhao ,  Cedric Fung Lam

IPC分类号： G02B6/24

CPC分类号： H04Q11/0005 ,  H04Q2011/0035

摘要： Systems and methods for optimizing port usage in an optical circuit switch are disclosed herein. A plurality of optical circulators can be coupled to the plurality of input and output ports of an optical circuit switch. An optical circulator coupled to an input port and an optical circulator coupled to an output port can form a bidirectional pair capable of communicating with any other bidirectional pair of the optical circuit switch. In this regard, the number of bidirectional ports of an optical circuit switch can be increased allowing additional bandwidth to flow through the optical circuit switch. Increasing the efficiency and capabilities of optical circuit switches within a large scale communications network can offer increased functionality and performance with little trade off.

摘要翻译： 本文公开了用于优化光电开关中的端口使用的系统和方法。 多个光循环器可以耦合到光电开关的多个输入和输出端口。 耦合到输入端口的光循环器和耦合到输出端口的光循环器可以形成能够与光电路开关的任何其它双向对通信的双向对。 在这方面，可以增加光学电路开关的双向端口的数量，允许额外的带宽流过光电开关。 在大规模通信网络中提高光电开关的效率和能力可以提供更多的功能和性能，几乎没有什么折衷。