公开(公告)号：US12021558B2

公开(公告)日：2024-06-25

申请号：US18315444

申请日：2023-05-10

申请人： T-Mobile USA, Inc.

发明人： George Cummings ,  Brett Christian ,  Scott Probasco

IPC分类号： H04B10/07 ,  H04B7/0426 ,  H04B17/26 ,  H04B17/318 ,  H04B17/336 ,  H04B17/391 ,  H04B10/50

CPC分类号： H04B10/07 ,  H04B7/043 ,  H04B17/26 ,  H04B17/318 ,  H04B17/336 ,  H04B17/3913 ,  H04B10/503

摘要： A system uses pulsed lasers to enhance a signal propagation path in a telecommunications network. The system can estimate a signal propagation path, which varies based on a current location of a mobile device relative to a base station. The system can detect a propagation loss due to a condition of a propagation medium including the signal propagation path and determine whether the mobile device is in Line-of-Sight (LOS) of a laser emitter. In response to detection of the propagation loss, the laser emitter can emit a pulsed laser that can enhance signal propagation by mitigating the propagation loss on the signal propagation path. The pulsed laser has a propagation path overlapping the signal propagation path when the mobile device is in LOS of the laser emitter, which is mounted on the base station.

公开(公告)号：US20240201419A1

公开(公告)日：2024-06-20

申请号：US18534797

申请日：2023-12-11

申请人： NEC Corporation

发明人： Hiroshi Imai

IPC分类号： G01W1/14 ,  G01H9/00 ,  G01V1/24

CPC分类号： G01W1/14 ,  G01H9/00 ,  G01V1/24 ,  H04B10/07

摘要： A spatial optical communication system includes: a plurality of optical transmitting and receiving apparatuses capable of constituting a mesh spatial optical communication network; and at least one processor, the at least one processor carrying out an analysis process of inferring, on the basis of reception signals of the optical transmitting and receiving apparatuses, a state of an air environment in at least one portion of an area in which the spatial optical communication network is formed, or a state of an installation ground of each of the optical transmitting and receiving apparatuses in the at least one portion of the area.

公开(公告)号：US11949453B2

公开(公告)日：2024-04-02

申请号：US17846604

申请日：2022-06-22

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Seung-Hyun Cho ,  Joon Ki Lee

IPC分类号： H04B10/07 ,  H04B10/077 ,  H04B10/2575

CPC分类号： H04B10/2575 ,  H04B10/077 ,  H04B10/07

摘要： A test device and method for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system examines the DFB-LD device based on an absolute limiting rating, an operating case environment, and a functional specification, in which the absolute limiting rating is a rating at which there is no fatal damage to the DFB-LD device during a short period of time when each limiting parameter is isolated and all other parameters are in a normal performance parameter, the operating case environment includes an operating temperature, and the functional specification includes parameters to be tested according to an operating condition for the functional specification.

公开(公告)号：US11942986B2

公开(公告)日：2024-03-26

申请号：US17736273

申请日：2022-05-04

申请人： VIAVI SOLUTIONS INC.

发明人： Vincent Lecoeuche

IPC分类号： H04B10/07 ,  H04B10/071 ,  H04B10/2537 ,  H04B10/50 ,  G01M11/00

CPC分类号： H04B10/071 ,  H04B10/2537 ,  H04B10/503 ,  G01M11/3109 ,  H04B10/07

摘要： According to examples, a channel checker optical time-domain reflectometer (OTDR) may include a laser source to emit a laser beam. An optical switch may be optically connected to the laser source to receive the laser beam and to selectively transmit the laser beam to a circulator that is optically connected to a device under test (DUT). A first coupler may be optically connected to a first photodiode and to the circulator. A second coupler may be optically connected to the first coupler, the optical switch, and a second photodiode.

公开(公告)号：US11910136B2

公开(公告)日：2024-02-20

申请号：US17890138

申请日：2022-08-17

申请人： VIAVI SOLUTIONS INC.

发明人： Hans Joerg Wolf ,  Reynald Dupuis

IPC分类号： H04Q11/00 ,  H04B10/073 ,  H04J14/02 ,  H04B10/272 ,  H04B10/07

CPC分类号： H04Q11/0067 ,  H04B10/07 ,  H04B10/073 ,  H04B10/272 ,  H04J14/0282 ,  H04Q11/0071 ,  H04Q2011/0079

摘要： Disclosed are apparatuses and testing methods for emulating an Optical Network Terminal (ONT) device for communicating or otherwise working with an Optical Line Terminal (OLT) device that was configured to operate with the ONT device. Such emulation may include configuring various settings of the apparatus so that the apparatus may appear to the OLT to be the ONT device. For example, the emulation may include accessing and using authentication/authorization related settings and network configuration settings of the ONT, thus permitting the apparatus to connect to a Passive Optical Network and test services and the quality of service experience without having to reconfigure the OLT.

公开(公告)号：US11870488B2

公开(公告)日：2024-01-09

申请号：US17680593

申请日：2022-02-25

申请人： Ciena Corporation

发明人： Choudhury A. Al Sayeed ,  Lorenzo Lepore

IPC分类号： H04B10/07 ,  H04B10/071 ,  H04B10/079 ,  G01M11/00

CPC分类号： H04B10/071 ,  H04B10/0791 ,  G01M11/3109 ,  H04B10/07 ,  H04B10/079 ,  H04B10/07955

摘要： Systems and methods include detecting a fast fiber transient on a span based on analyzing power data, wherein the power data is for any of optical wavelengths of traffic channels, optical service channel (OSC) wavelengths, and telemetry from a network element; and responsive to detecting the fast fiber transient, causing an optical time domain reflectometer (OTDR) trace on the span with a specific configuration based on the fast fiber transient.

公开(公告)号：US20230361868A1

公开(公告)日：2023-11-09

申请号：US18315444

申请日：2023-05-10

申请人： T-Mobile USA, Inc.

发明人： George Cummings ,  Brett Christian ,  Scott Probasco

IPC分类号： H04B10/07 ,  H04B17/391 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0426 ,  H04B17/26

CPC分类号： H04B10/07 ,  H04B17/3913 ,  H04B17/318 ,  H04B17/336 ,  H04B7/043 ,  H04B17/26 ,  H04B10/503

摘要： A system uses pulsed lasers to enhance a signal propagation path in a telecommunications network. The system can estimate a signal propagation path, which varies based on a current location of a mobile device relative to a base station. The system can detect a propagation loss due to a condition of a propagation medium including the signal propagation path and determine whether the mobile device is in Line-of-Sight (LOS) of a laser emitter. In response to detection of the propagation loss, the laser emitter can emit a pulsed laser that can enhance signal propagation by mitigating the propagation loss on the signal propagation path. The pulsed laser has a propagation path overlapping the signal propagation path when the mobile device is in LOS of the laser emitter, which is mounted on the base station.

公开(公告)号：US20230327765A1

公开(公告)日：2023-10-12

申请号：US18132946

申请日：2023-04-10

申请人： ADVA Optical Networking SE

发明人： Rapp Lutz

IPC分类号： H04B10/25 ,  H04B10/07

CPC分类号： H04B10/25891 ,  H04B10/07

摘要： A bidirectional optical communication link, OCL, (1) comprising a first optical transmission link, OTL1, adapted to transmit an optical signal from a near-end location (NEL) via a first optical fiber (2-1) to a remote-end location (REL); and a second optical transmission link, OTL2, adapted to transmit an optical signal from the remote-end location (REL) via a second optical fiber (2-2) to the near-end location(NEL); wherein at least one of the optical transmission links, OTL1, OTL2, comprises a remote optically pumped amplifier, ROPA, (3-1,3-3) having a gain medium which is pumped with pump light received by that gain medium through a third optical fiber (4) from a pump laser source provided at the near-end location (NEL) or provided at the remote-end location (REL) to supply the gain medium of the remote optical pump amplifier, ROPA, (3-1,3-2) with pump power.

公开(公告)号：US20230314276A1

公开(公告)日：2023-10-05

申请号：US18128655

申请日：2023-03-30

申请人： CORNING INCORPORATED

发明人： Xin Chen ,  Kangmei Li ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Simit Mayank Patel

IPC分类号： G01M11/00 ,  H04B10/07

CPC分类号： G01M11/30 ,  H04B10/07

摘要： A method of categorizing single mode optical fibers, the method including determining one or more fiber properties of an optical fiber, the optical fiber being a single mode optical fiber at an operating wavelength of about 1310 nm. The method further including calculating a peak bandwidth wavelength of the optical fiber based on the one or more fiber properties, comparing the calculated peak bandwidth wavelength with a target peak bandwidth wavelength and based on the comparison, determining if the optical fiber meets a target modal bandwidth.

公开(公告)号：US11671172B1

公开(公告)日：2023-06-06

申请号：US17681171

申请日：2022-02-25

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Zhiping Jiang

IPC分类号： H04B10/07 ,  H04B10/071 ,  H04B10/2537 ,  H04J14/02 ,  H04B10/2507 ,  H04B10/291 ,  G01M11/00

CPC分类号： H04B10/071 ,  G01M11/319 ,  G01M11/3109 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/2537 ,  H04B10/2916 ,  H04J14/02

摘要： The disclosed systems and methods for characterizing an optical fiber in a dense wavelength division multiplexing (DWDM) optical link. The characterizing comprising: i) applying a power dither to data bearing optical signals propagating in the optical fiber, the power dither having a high-power level and a low-power level; ii) computing optical time-domain reflectometer (OTDR) traces corresponding to the high-power level and the low-power level of the power dither; iii) averaging the OTDR traces corresponding to the high-power level and the OTDR traces corresponding to the low-power level into average OTDR traces; computing a differential Stimulated Raman Scattering (SRS) gain from the OTDR traces; and iv) adjusting the average OTDR traces based on the differential SRS gain.