公开(公告)号：US10715270B2

公开(公告)日：2020-07-14

申请号：US16341479

申请日：2017-10-20

Applicant: NEC CORPORATION

Inventor： Ryuji Aida

IPC: H04J14/02 ,  H04B10/032 ,  H04B10/03

Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.

公开(公告)号：US10348440B2

公开(公告)日：2019-07-09

申请号：US15570462

申请日：2016-05-09

Applicant: NEC CORPORATION

Inventor： Ryuji Aida

IPC: H04J14/02 ,  H02H3/00 ,  H02J1/00 ,  H02J9/06 ,  H04B3/44 ,  H04B10/03 ,  H04B10/80 ,  H04Q11/00

Abstract: In order to provide a power supply path-switching device, a power supply path-switching system, and a power supply path-switching method with which it is possible to utilize to the maximum equipment in which a failure has not occurred without imparting a power supply function to a branch station side even when a failure has occurred in the power supply function of the trunk station side, a power supply path-switching device (10) is provided with a first switching means (20), a second switching means (30), a grounding means (40), and a power consumption circuit (50) that operates by being supplied with the power supply. When a failure occurs in a first power supply line (61), the power consumption circuit (50) grounds the first power supply line (61), one end of the power consumption circuit (50) being connected to the grounding means (40) and a second power supply line (62) being connected to the other end of the power consumption circuit (50). When a failure occurs in the second power supply line (62), the power consumption circuit (50) grounds the second power supply line (62), the first power supply line (61) being connected to one end of the power consumption circuit (50) and the other end of the power consumption circuit (50) being connected to a grounding means (24).

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。

公开(公告)号：US20230344521A1

公开(公告)日：2023-10-26

申请号：US18022932

申请日：2021-09-27

Applicant: NEC Corporation

Inventor： Yutaka YANO ,  Yoshihisa Inada ,  Takehiro Nakano ,  Ryuji Aida

IPC: H04B10/524 ,  H04J14/08

CPC classification number: H04B10/524 ,  H04J14/08

Abstract: In order to avoid the phenomenon of communication being impeded and signals transmitted by the plurality of slave devices overlapping, a communication system according to the present invention has the first master device transmits a first pulsed light to the first transmission path and receives a return light of the first pulsed light from the second transmission path; each of the slave devices modulates the first pulsed light, and outputs the modulated first pulsed light as the return light of the first pulsed light; and the width of the first pulsed light is narrower than double the shortest distance from among the transmission distance between the slave device outputting the return light and the transmission distance between the first master device and the slave device outputting the return light.

公开(公告)号：US11438087B2

公开(公告)日：2022-09-06

申请号：US17368653

申请日：2021-07-06

Applicant: NEC Corporation

Inventor： Ryuji Aida

IPC: H04J14/02 ,  H04B10/03 ,  H04B10/032

Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.

公开(公告)号：US11082145B2

公开(公告)日：2021-08-03

申请号：US16902654

申请日：2020-06-16

Applicant: NEC Corporation

Inventor： Ryuji Aida

IPC: H04J14/02 ,  H04B10/03 ,  H04B10/032

Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.

公开(公告)号：US09912407B2

公开(公告)日：2018-03-06

申请号：US15128374

申请日：2015-02-27

Applicant: NEC Corporation

Inventor： Ryuji Aida

IPC: H04B10/299 ,  H04B10/079 ,  H04B10/296 ,  H04J14/02

CPC classification number: H04B10/299 ,  H04B10/0777 ,  H04B10/0793 ,  H04B10/0797 ,  H04B10/296 ,  H04J14/0221 ,  H04J14/0227

Abstract: An optical relay device is provided which is capable of outputting control signal light without equipping a light source for the control signal light and capable of flexibly managing and changing a wavelength of the control signal light in accordance with a state of a network. The optical relay device includes an optical receiving unit that receives a wavelength multiplexed optical signal, a control unit that specifies a first wavelength and outputting notification information, and a processing unit that selects an optical signal having the first wavelength from the received wavelength multiplexed optical signal, applying intensity-modulation in accordance with the notification information to the selected optical signal, adding the intensity-modulated optical signal back to the wavelength multiplexed optical signal, and outputting the wavelength multiplexed optical signal.

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。

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。