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1. 发明授权

US10581518B2 Optical transmission/reception device, optical communication system, and optical communication method 有权
公开(公告)号：US10581518B2
公开(公告)日：2020-03-03
申请号：US15920847
申请日：2018-03-14
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/03 , H04B10/07 , H04B10/85 , H04B10/296 , H04B10/80 , H04J14/02
摘要： [Problem] To provide an optical transmission/reception device, an optical communication system, an optical communication method, and a program which are capable of securing the confidentiality of information included in an optical signal even when the optical signal is transferred to a device that is not an original transmission destination device.[Solution] This optical transmission/reception device is provided with: a wave separation unit for receiving a wavelength-multiplexed optical signal and separating the same into a plurality of optical signals; a plurality of reception units for receiving each of the plurality of optical signals separated by the wave separation unit; a plurality of output units for outputting optical signals differing in wavelength from each other; a control unit for requesting, in response to the inclusion in the received wavelength-multiplexed optical signal of an optical signal to which a prescribed process has been applied, that a prescribed change be applied to the optical signal outputted by at least one of the plurality of output units; and a wave combining unit for combining the plurality of optical signals outputted from the plurality of output units and outputting the combined signal.

2. 发明授权

US11942991B2 Optical submarine branching apparatus, optical submarine cable system, switching method, non-transitory computer-readable medium 有权
公开(公告)号：US11942991B2
公开(公告)日：2024-03-26
申请号：US17439914
申请日：2019-11-12
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/80 , H04B10/25 , H04Q11/00
CPC分类号： H04B10/25 , H04Q11/0005 , H04Q2011/0037
摘要： An optical submarine branching apparatus 1 includes a control unit and a switching unit. The switching unit connects to a plurality of first optical fiber transmission lines connecting to a first terminal station, a plurality of second optical fiber transmission lines connecting to a second terminal station, and a third optical fiber transmission line connecting to a third terminal station, and switches a transmission route of a wavelength-multiplexed optical signal. The control unit controls the switching of the transmission route by the switching unit. The switching unit is configured to be capable of connecting each of the plurality of first optical fiber transmission lines to one of the plurality of second optical fiber transmission lines. The switching unit further is configured to be capable of switching any one of the plurality of first optical fiber transmission lines to connect to the third optical fiber transmission line.

3. 发明授权

US11251895B2 Seabed branching device, optical seabed cable system, and optical communication method 有权
公开(公告)号：US11251895B2
公开(公告)日：2022-02-15
申请号：US16981497
申请日：2019-03-18
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04J14/02
摘要： To use a plurality of wavelength bands, this seabed branching device comprises: a first demultiplexing unit that demultiplexes a wavelength multiplexed optical signal, which was input from a first terminal, into a first wavelength multiplexed optical signal and a second wavelength multiplexed optical signal; an optical add/drop unit that outputs at least a third wavelength multiplexed optical signal included in the first wavelength multiplexed optical signal to a second terminal station, and outputs at least a fifth wavelength multiplexed optical signal by multiplexing a fourth wavelength multiplexed optical signal included in the first wavelength multiplexed optical signal and a wavelength multiplexed optical signal input from the second terminal station; and a first multiplexing unit that multiplexes the second wavelength multiplexed optical signal and the fifth wavelength multiplexed optical signal, which was input from the optical add/drop unit, and outputs the result to a third terminal station.

4. 发明公开

US20240348338A1 LIGHT MULTIPLEXING/DEMULTIPLEXING DEVICE AND LIGHT MULTIPLEXING/DEMULTIPLEXING METHOD 审中-公开
公开(公告)号：US20240348338A1
公开(公告)日：2024-10-17
申请号：US18683328
申请日：2021-08-27
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/293 , H04J14/02
CPC分类号： H04B10/293 , H04J14/0307
摘要： The light multiplexing/demultiplexing device comprises: a first demultiplexer that demultiplexes an inputted first wavelength-multiplexed signal light into a first signal light of a first wavelength band and a second signal light of a second wavelength band and outputs the first and the second signal light; a first amplifier that amplifies the second signal light from the first demultiplexer; a light processor that, based on the inputted second signal light and an inputted third signal light of the second wavelength band, outputs a fourth signal light; and a first multiplexer that multiplexes the fourth signal light with the first signal light from the first demultiplexer, further, the gain of the first amplifier is set such that the difference between power of the first signal light outputted from the first multiplexer and power of the fourth signal light outputted from the first multiplexer is equal to or less than a predetermined value.

5. 发明公开

US20240072890A1 OPTICAL SIGNAL MONITORING APPARATUS, OPTICAL SIGNAL MONITORING SYSTEM, AND OPTICAL SIGNAL MONITORING METHOD 审中-公开
公开(公告)号：US20240072890A1
公开(公告)日：2024-02-29
申请号：US18237227
申请日：2023-08-23
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/071 , H04B10/25
CPC分类号： H04B10/071 , H04B10/25
摘要： An optical signal monitoring apparatus is used in an optical submarine cable system in which a first branch line is connected to a transmission line being connected to a predetermined terminal station provided in a trunk line, and a second branch line is connected to a reception line being connected to the terminal station. In the optical signal monitoring apparatus, a first extraction unit selectively extracts first monitoring light included in a transmission signal transmitted from the transmission line to the first branch line. A first relay line transmits the extracted first monitoring light to the second branch line. A first merging unit merges the first monitoring light from the first relay line into a reception signal of the second branch line. Further, the first extraction unit transmits, to the first relay line, return light transmitted in a direction opposite to the transmission signal in the first branch line.

6. 发明授权

US09954607B2 Optical transmission/reception device, optical communication system, and optical communication method 有权
公开(公告)号：US09954607B2
公开(公告)日：2018-04-24
申请号：US15129105
申请日：2015-03-20
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/03 , H04B10/07 , H04B10/80 , H04J14/02
CPC分类号： H04B10/03 , H04B10/296 , H04B10/80 , H04B10/85 , H04J14/02 , H04J14/021 , H04J14/0221
摘要： [Problem] To provide an optical transmission/reception device, an optical communication system, an optical communication method, and a program which are capable of securing the confidentiality of information included in an optical signal even when the optical signal is transferred to a device that is not an original transmission destination device.[Solution] This optical transmission/reception device is provided with: a wave separation unit for receiving a wavelength-multiplexed optical signal and separating the same into a plurality of optical signals; a plurality of reception units for receiving each of the plurality of optical signals separated by the wave separation unit; a plurality of output units for outputting optical signals differing in wavelength from each other; a control unit for requesting, in response to the inclusion in the received wavelength-multiplexed optical signal of an optical signal to which a prescribed process has been applied, that a prescribed change be applied to the optical signal outputted by at least one of the plurality of output units; and a wave combining unit for combining the plurality of optical signals outputted from the plurality of output units and outputting the combined signal.

7. 发明授权

US11057110B2 Optical transmission device and optical transmission method 有权
公开(公告)号：US11057110B2
公开(公告)日：2021-07-06
申请号：US16755959
申请日：2018-10-23
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04B10/293 , H04J14/02 , H04B10/077
摘要： In order to improve reception sensitivity of a response signal at a terminal station, an optical transmission device includes a reception unit that receives a control signal including a predetermined instruction and a main signal, via an optical transmission path connected to the terminal station, a control unit that performs the predetermined instruction of the received control signal, an extraction unit that extracts light in a band of the control signal, a response signal generation unit that modulates the extracted light in the band of the control signal, and outputs a response signal, and a multiplexing unit that multiplexes and outputs the response signal and the main signal. The control unit controls modulation by the response signal generation unit according to the control signal.

8. 发明授权

US10554322B2 Optical control device and optical branching device 有权
公开(公告)号：US10554322B2
公开(公告)日：2020-02-04
申请号：US16079610
申请日：2017-03-09
申请人： NEC Corporation
发明人： Ryota Abe
IPC分类号： H04J14/02 , H04B10/296 , H04B10/294
摘要： In order to provide a feature with which it is possible to suppress the occurrence of an optical surge independently of the type of optical switch, there is provided an optical control device for processing inputted first light and outputting second light, wherein the optical control device is provided with: a switching unit for switching and outputting first light that has undergone a selected process; and a variable output unit connected in series to the switching unit, the variable output unit operating so as to reduce the optical power of the second light before switching by the switching unit is executed and to gradually increase the optical power of the second light after the switching is executed.

9. 发明授权

US10243685B2 Extended branching device and control method of the same 有权
公开(公告)号：US10243685B2
公开(公告)日：2019-03-26
申请号：US15556518
申请日：2016-03-09
申请人： NEC CORPORATION
发明人： Ryota Abe
IPC分类号： H04J14/02 , H04B10/29 , G02B6/293 , H04B10/61
摘要： In order to provide an extended branch device in which construction work is easy and communication is not significantly affected by construction work, and a method for controlling the extended branch device, the extended branch device of the present invention is provided with: a first branch unit provided with a first port coupled to a first terminal station, a second port coupled to a second terminal station, a third port, a fourth port, and a switch for coupling the first port with the second or third port and coupling the second port with the fourth port; and a first separation unit provided with a fifth port coupled to the third port, a sixth port coupled to the fourth port, and a seventh port coupled to a third terminal station, the first separation unit outputting, from the sixth port, an optical signal having a first wavelength among the optical signals inputted from the fifth port, and outputting, from the seventh port, an optical signal having a second wavelength among the optical signals inputted from the fifth port. The extended branch device is further provided with a second branch unit configured so as to be separable from the first branch unit.

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