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1. 发明申请

US20210320720A1 OPTICAL TRANSMISSION APPARATUS, OPTICAL COMMUNICATION SYSTEM, AND OPTICAL SIGNAL TRANSMISSION METHOD 有权
公开(公告)号：US20210320720A1
公开(公告)日：2021-10-14
申请号：US17273571
申请日：2019-04-25
申请人： NEC Corporation
发明人： Yoshirou SATOU
IPC分类号： H04B10/50 , H04J14/02
摘要： An object is to perform wavelength filtering of an optical signal while preventing filter narrowing in an optical transmission apparatus. A branching unit branches a wavelength-multiplexed optical signal including an optical signal of a first wavelength into two optical signals. A wavelength selection unit blocks an optical signal of a first wavelength band including the first wavelength in the optical signal. A filter unit allows passage of an optical signal of a second wavelength band including the first wavelength in the optical signal. A multiplexing unit multiplexes and the optical signal and an optical signal of a second wavelength. The second wavelength band is wider than the first wavelength band.

2. 发明申请

US20170279529A1 SIGNAL DETECTION DEVICE AND SIGNAL DETECTION METHOD 有权
公开(公告)号：US20170279529A1
公开(公告)日：2017-09-28
申请号：US15512323
申请日：2015-09-14
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04J14/02
CPC分类号： H04B10/07955 , H04B10/079 , H04J14/00 , H04J14/02 , H04J14/0221
摘要： A signal detection device including: a comparison unit that obtains data including central frequencies of optical signals respectively transmitted by a plurality of optical transmitters and a central frequency interval indicating the interval between the central frequencies, power measurement values obtained by measuring, at sampling point frequencies arranged at a prescribed sampling interval, the power of a WDM signal for which the wavelength of optical signals has been multiplexed, a sampling interval, and sampling point frequencies, that selects a selection value from among the power measurement values on the basis of the central frequency interval and the sampling interval, and that outputs a result of comparison between the selection value and a prescribed threshold; and an alarm generator that outputs a signal interruption alarm in a case where the comparison result indicates that the selection value is less than the threshold.

3. 发明公开

US20230379053A1 OPTICAL SIGNAL MONITOR, OPTICAL WAVELENGTH MULTIPLEXING TRANSMITTER, AND METHOD FOR MONITORING OPTICAL SIGNAL 审中-公开
公开(公告)号：US20230379053A1
公开(公告)日：2023-11-23
申请号：US18363272
申请日：2023-08-01
申请人： NEC Corporation
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04B10/075 , H04J14/00 , H04J14/02 , H04B10/572
CPC分类号： H04B10/0795 , H04B10/075 , H04J14/00 , H04J14/02 , H04B10/07955 , H04J14/0221 , H04J14/026 , H04B10/572
摘要： An optical signal monitor, including: a storage that holds a threshold value set for each of determination areas having a bandwidth set in accordance with an average grid of dummy light; a measurement section that sequentially measures an optical intensity of an inputted wavelength-multiplexed optical signal with respect to each of measurement areas obtained by dividing the determination area into areas with a bandwidth sufficiently smaller than a grid width of a monitoring-target optical signal composing the wavelength-multiplexed optical signal, and output measured values; and a section that determines that dummy light corresponding to the determination area needs introducing if each of measured values in the determination area is smaller than a threshold value, and, determines that dummy light corresponding to the determination area does not need introducing if at least one of the measured values in the determination area is equal to or larger than the threshold value.

4. 发明申请

US20190253139A1 MONITORING SYSTEM AND MONITORING METHOD 审中-公开
公开(公告)号：US20190253139A1
公开(公告)日：2019-08-15
申请号：US16332045
申请日：2017-09-11
申请人： NEC Corporation
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04J14/02
摘要： A monitoring system for a transmission line that transmits an optical wavelength multiplexed signal between the local station and a remote station, including: a first monitor means for measuring the optical power of an optical signal pertaining to the optical wavelength multiplexed signal transmitted by the local station; a second monitor means for measuring the optical power of an optical signal pertaining to the optical wavelength multiplexed signal received by the local station; and a monitoring control means for transmitting the local station's transponder wavelength information and dummy optical wavelength information, and transmitting the remote station's transponder wavelength information and dummy optical wavelength information.

5. 发明申请

US20200076500A1 OPTICAL SIGNAL MONITOR, OPTICAL WAVELENGTH MULTIPLEXING TRANSMITTER, AND METHOD FOR MONITORING OPTICAL SIGNAL 审中-公开
公开(公告)号：US20200076500A1
公开(公告)日：2020-03-05
申请号：US16440002
申请日：2019-06-13
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04B10/572 , H04J14/02 , H04J14/00 , H04B10/075
摘要： An optical signal monitor, including: a storage that holds a threshold value set for each of determination areas having a bandwidth set in accordance with an average grid of dummy light; a measurement section that sequentially measures an optical intensity of an inputted wavelength-multiplexed optical signal with respect to each of measurement areas obtained by dividing the determination area into areas with a bandwidth sufficiently smaller than a grid width of a monitoring-target optical signal composing the wavelength-multiplexed optical signal, and output measured values; and a section that determines that dummy light corresponding to the determination area needs introducing if each of measured values in the determination area is smaller than a threshold value, and, determines that dummy light corresponding to the determination area does not need introducing if at least one of the measured values in the determination area is equal to or larger than the threshold value.

6. 发明申请

US20180034544A1 OPTICAL SIGNAL MONITOR, OPTICAL WAVELENGTH MULTIPLEXING TRANSMITTER, AND METHOD FOR MONITORING OPTICAL SIGNAL 审中-公开
公开(公告)号：US20180034544A1
公开(公告)日：2018-02-01
申请号：US15551810
申请日：2016-03-01
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04B10/572 , H04J14/02
CPC分类号： H04B10/0795 , H04B10/075 , H04B10/572 , H04J14/00 , H04J14/02
摘要： An optical signal monitor, including: a storage that holds a threshold value set for each of determination areas having a bandwidth set in accordance with an average grid of dummy light; a measurement section that sequentially measures an optical intensity of an inputted wavelength-multiplexed optical signal with respect to each of measurement areas obtained by dividing the determination area into areas with a bandwidth sufficiently smaller than a grid width of a monitoring-target optical signal composing the wavelength-multiplexed optical signal, and output measured values; and a section that determines that dummy light corresponding to the determination area needs introducing if each of measured values in the determination area is smaller than a threshold value, and, determines that dummy light corresponding to the determination area does not need introducing if at least one of the measured values in the determination area is equal to or larger than the threshold value.

7. 发明申请

US20150349879A1 OPTICAL BRANCHING/INSERTION DEVICE, OPTICAL BRANCHING/INSERTION METHOD AND RECORDING MEDIUM 有权
标题翻译：光学分支/插入设备，光学分支/插入方法和记录介质
公开(公告)号：US20150349879A1
公开(公告)日：2015-12-03
申请号：US14761376
申请日：2014-01-17
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04B10/032 , H04B10/294 , H04J14/02
CPC分类号： H04J14/0221 , H04B10/032 , H04B10/294 , H04J14/0213 , H04J14/0295
摘要： [Objective] To make it possible to effectively relay remaining signals even when any input failure occurs on a propagation path.[Solution] Provided is an optical branching/insertion device including: a trunk-side detection/branching unit for detecting a failure of a trunk-side optical signal inputted from the trunk side and outputting it as a first detection result, and for splitting the trunk-side optical signal and sending the split signals respectively to the trunk side and to the branch side; a branch-side detection unit for detecting a failure of a branch-side optical signal inserted from the branch side and outputting it as a second detection result, and for sending the branch-side optical signal as an insertion signal; an insertion signal adjustment unit for outputting the insertion signal with its pass-through degree having been adjusted on the basis of the first detection result, as a first adjusted signal; a trunk signal adjustment unit for outputting the trunk-side optical signal with its pass-through degree having been adjusted on the basis of the first detection result, as a second adjusted signal; and a combining/output unit for outputting, to the outside, an optical signal into which the first adjusted signal and the second adjusted signal are combined together, as a trunk-side output optical signal.
摘要翻译： [目的]即使在传播路径上发生任何输入故障，也可以有效地中继剩余的信号。 [解决方案]提供一种光分路/插入装置，包括：主干侧检测/分支单元，用于检测从主干侧输入的中继侧光信号的故障，并将其作为第一检测结果输出，中继侧光信号，分别发送到主干侧和分支侧; 分支侧检测单元，用于检测从分支侧插入的分支侧光信号的故障并将其作为第二检测结果输出，并用于发送分支侧光信号作为插入信号; 插入信号调整单元，用于输出基于第一检测结果调整了其通过度的插入信号作为第一调整信号; 中继信号调整单元，用于根据第一检测结果输出其通过度被调整的中继侧光信号作为第二调整信号; 以及组合/输出单元，用于向外部输出第一调整信号和第二调整信号组合在一起的光信号作为中继侧输出光信号。

8. 发明申请

US20210281348A1 LIGHT WAVELENGTH SEPARATION DEVICE AND LIGHT WAVELENGTH SEPARATION METHOD 有权
公开(公告)号：US20210281348A1
公开(公告)日：2021-09-09
申请号：US17328021
申请日：2021-05-24
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04J14/02 , H04Q11/00
摘要： To provide a light wavelength separation device and a light wavelength separation method that can be flexibly adapted for various channel intervals of a wavelength-division multiplexed (WDM) signal, a light wavelength separation circuit is provided with: an optical coupler which splits a wavelength-multiplexed optical signal in which optical signals of a plurality of channels are multiplexed; a band-pass filter which is arranged for each of output ports of the optical coupler, separates optical signals included in the wavelength-multiplexed optical signal inputted from the output ports of the optical coupler into channels of which the central frequencies are not adjacent to each other, and outputs the separated optical signals from respectively different output ports; and an optical switch which selects one of paths of the optical signals inputted from the output ports of each band-pass filter.

9. 发明申请

US20200169348A1 LIGHT WAVELENGTH SEPARATION DEVICE AND LIGHT WAVELENGTH SEPARATION METHOD 审中-公开
公开(公告)号：US20200169348A1
公开(公告)日：2020-05-28
申请号：US16629666
申请日：2018-07-20
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04J14/02 , H04Q11/00
摘要： To provide a light wavelength separation device and a light wavelength separation method that can be flexibly adapted for various channel intervals of a wavelength-division multiplexed (WDM) signal, a light wavelength separation circuit is provided with: an optical coupler which splits a wavelength-multiplexed optical signal in which optical signals of a plurality of channels are multiplexed; a band-pass filter which is arranged for each of output ports of the optical coupler, separates optical signals included in the wavelength-multiplexed optical signal inputted from the output ports of the optical coupler into channels of which the central frequencies are not adjacent to each other, and outputs the separated optical signals from respectively different output ports; and an optical switch which selects one of paths of the optical signals inputted from the output ports of each band-pass filter.

10. 发明申请

US20180198521A1 SIGNAL DETECTION DEVICE AND SIGNAL DETECTION METHOD 审中-公开
公开(公告)号：US20180198521A1
公开(公告)日：2018-07-12
申请号：US15914232
申请日：2018-03-07
申请人： NEC CORPORATION
发明人： Yoshirou SATOU
IPC分类号： H04B10/079 , H04J14/02
CPC分类号： H04B10/07955 , H04B10/079 , H04J14/00 , H04J14/02 , H04J14/0221
摘要： A signal detection device including: a comparison unit that obtains data including central frequencies of optical signals respectively transmitted by a plurality of optical transmitters and a central frequency interval indicating the interval between the central frequencies, power measurement values obtained by measuring, at sampling point frequencies arranged at a prescribed sampling interval, the power of a WDM signal for which the wavelength of optical signals has been multiplexed, a sampling interval, and sampling point frequencies, that selects a selection value from among the power measurement values on the basis of the central frequency interval and the sampling interval, and that outputs a result of comparison between the selection value and a prescribed threshold; and an alarm generator that outputs a signal interruption alarm in a case where the comparison result indicates that the selection value is less than the threshold.

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