公开(公告)号：US20240305665A1

公开(公告)日：2024-09-12

申请号：US18181238

申请日：2023-03-09

申请人： Cisco Technology, Inc.

发明人： Bing Qi

IPC分类号： H04L9/40 ,  H04B10/075

CPC分类号： H04L63/1475 ,  H04B10/075

摘要： An endpoint receives a photon signal jointly encoded in time and frequency as a time-frequency state, and separates the photon signal with a dispersive element to generate frequency components. The endpoint delays each corresponding frequency component by a corresponding time delay to separate out the frequency components in time before the endpoint recombines the frequency components to generate a frequency-separated signal. The endpoint measures the frequency-separated signal to determine the time-frequency state of the photon signal.

公开(公告)号：US20240204875A1

公开(公告)日：2024-06-20

申请号：US18287300

申请日：2021-04-28

申请人： Mitsubishi Electric Corporation

发明人： Mamiko TANAKA ,  Yoshiaki KONISHI ,  Kenji ISHII

IPC分类号： H04B10/29 ,  H04B10/075

CPC分类号： H04B10/29 ,  H04B10/075

摘要： A regenerative relay transponder includes: an optical receiving unit that receives an optical signal from a transmitting device as a reception optical signal and converts the reception optical signal into an electrical signal; an electrical-signal processing unit that executes predetermined processing on the electrical signal; an optical transmitting unit that generates a transmission optical signal by converting the electrical signal subjected to the predetermined processing into an optical signal and transmits the transmission optical signal; and a monitoring unit that monitors the predetermined processing by the electrical-signal processing unit, wherein the monitoring unit accumulates in a storage unit monitoring data, which indicates the result of the monitoring, over a predetermined period and causes a communication unit to transmit the monitoring data accumulated over the predetermined period as transmission data to the transmitting device.

公开(公告)号：US20240120995A1

公开(公告)日：2024-04-11

申请号：US17963341

申请日：2022-10-11

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Zhiping JIANG

IPC分类号： H04B10/075 ,  H04B10/61 ,  H04B10/67

CPC分类号： H04B10/075 ,  H04B10/614 ,  H04B10/674

摘要： The disclosed systems and methods for detecting a location of reflection in an optical link comprising: i) receiving an optical signal; ii) receiving a plurality of first type of delayed optical signals corresponding to the optical signal; iii) determining a first type of time delays associated with each of the plurality of first type of delayed optical signals; iv) receiving a plurality of second type of delayed optical signals corresponding to the optical signal; v) determining a second type of time delays associated with the each of the plurality of second type of delayed optical signals; vi) computing relative delays from the second type of time delays; vii) comparing the relative delays with the first type of time delays; and viii) determining a location of a given optical element contributing to the reflections based on the given relative delay and the location of the AR.

公开(公告)号：US11936422B2

公开(公告)日：2024-03-19

申请号：US17908072

申请日：2021-03-04

申请人： NEC Corporation

发明人： Motoyoshi Kawai

IPC分类号： H04B10/075 ,  H04J14/02

CPC分类号： H04B10/075 ,  H04J14/0227

摘要： A variable optical BPF allows a signal light of a specified wavelength band in a signal light including reference signal lights to pass through. A light receiving unit outputs a level signal indicating a level of the signal light having passed through the variable optical BPF. A control unit refers to a wavelength table held in advance, instructs a wavelength band that passes through the variable optical BPF, and obtains a spectrum of the signal light having passed through the variable optical BPF using the wavelength table and the level signal. The control unit detects a wavelength drift between a center wavelength of the wavelength band instructed to the variable optical BPF to cause the reference signal lights to pass through and center wavelengths of peaks corresponding to the reference signal lights in the spectrum, and updates the wavelength table to corrects the detected wavelength drift.

公开(公告)号：US20230113892A1

公开(公告)日：2023-04-13

申请号：US17949875

申请日：2022-09-21

申请人： NEXANS

发明人： Jean-Jacques SAGE ,  Mathieu BRIGOT

IPC分类号： H04B10/075

摘要： A system (10) for monitoring a network is formed by a plurality of devices (12), each device (12) of the plurality of devices having at least one status sensor (13) measuring at least one physical parameter of the device (12). The system (10) further has a monitoring platform (14) communicating with the at least one status sensor (13) by means of a telecommunications network (16).

公开(公告)号：US11362734B2

公开(公告)日：2022-06-14

申请号：US17033247

申请日：2020-09-25

申请人： ARRIS Enterprises LLC

发明人： Marcel F. Schemmann ,  Venkatesh G. Mutalik

IPC分类号： H04B10/2575 ,  H04B10/27 ,  H04J14/02 ,  H04N7/22 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/29 ,  H04B10/50 ,  H04B10/516 ,  H04B10/564 ,  H04B10/075 ,  H04B10/272 ,  H04B10/58 ,  H04B10/079

摘要： Systems and methods for optical modulation index calibration in a CATV network.

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.

公开(公告)号：US10511381B2

公开(公告)日：2019-12-17

申请号：US15778011

申请日：2016-11-22

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Oda ,  Tetsuro Inui ,  Akira Hirano ,  Wataru Imajuku ,  Shoukei Kobayashi ,  Takafumi Tanaka ,  Yutaka Miyamoto ,  Hidehiko Takara

IPC分类号： H04B10/07 ,  H04B10/077 ,  H04L12/437 ,  H04B10/25 ,  H04J14/02 ,  G02B6/02 ,  H04B10/075 ,  H04B10/2575

摘要： A communication system includes three or more nodes, and a multi-core fiber having a plurality of cores, the multi-core fiber being used in at least a partial segment of a connection between the nodes, wherein each of nodes includes: a fault information transmitting device configured to transmit fault information indicating that a fault has occurred in a communication path between one node and another node of the nodes when it is detected that it is not possible to perform communication between the one node and the another node; and a fault location specifying device configured to specify a section between nodes in which a fault has occurred on the basis of the fault information received from the fault information transmitting device provided in each of the nodes.

公开(公告)号：US10425157B2

公开(公告)日：2019-09-24

申请号：US16224552

申请日：2018-12-18

申请人： VIAVI SOLUTIONS INC.

发明人： Andre Champavere

IPC分类号： H04B10/079 ,  H04J14/02 ,  H04B10/572 ,  H04B10/25 ,  H04B10/071 ,  H04B10/075

摘要： According to examples, a wavelength identification and analysis sensor may include a wavelength transmitter, operably connectable to an input or output of a wavelength selective device of a wavelength division multiplex (WDM) network, to transmit test signals on a plurality of wavelengths into the input or output of the wavelength selective device of the WDM network. A wavelength analyzer is to detect returned signals from the input or output of the wavelength selective device of the WDM network, with each returned signal being associated with one of the transmitted test signals. Further, the wavelength analyzer is to analyze the returned signals and identify, based on the analysis of the returned signals, a wavelength associated with the input or output of the wavelength selective device of the WDM network.

公开(公告)号：US20190158174A1

公开(公告)日：2019-05-23

申请号：US15820807

申请日：2017-11-22

申请人： Mellanox Technologies, Ltd.

发明人： Elad MENTOVICH ,  Itsik KALIFA ,  Kfir MARGALIT

IPC分类号： H04B10/075 ,  H04B10/50

CPC分类号： H04B10/075 ,  H04B10/50

摘要： A system for testing optical transmitters including a testing unit, a sensor board, one or more support rails, and a driver is provided. The testing board includes sockets that each receive a substrate supporting a plurality of optical transmitters, and the sensor board includes optical receivers. The one or more support rails are attached to one of the testing board or the sensor board and are designed to engage the other of the testing board or the sensor board. The one or more support rails are configured to substantially align each of the optical receivers with a corresponding socket. The driver is in electrical communication with the optical transmitters and the one or more optical receivers such that the driver can apply a current input to at least, one of the optical transmitters and monitor a corresponding output parameter.