公开(公告)号：EP3982559A1

公开(公告)日：2022-04-13

申请号：EP20306188.2

申请日：2020-10-09

申请人： Nokia Solutions and Networks Oy ,  Telecom Paris Tech

发明人： MAY, Alix ,  RAMANTANIS, Petros ,  BOITIER, Fabien ,  AWWAD, Elie ,  LONARDI, Matteo

IPC分类号： H04B10/077 ,  G01M11/00

摘要： The location and power loss of anomalies along an optical link are determined from a distance-wise signal power profile along the optical link and a reference signal power profile. A distance-wise power difference profile between the reference signal power profile and the signal power profile is calculated. A derivative of the power difference profile is calculated. An anomaly indicating a power loss in the optical link is identified from the difference profile. The estimated location of the anomaly is determined from the derivative. An estimated power loss of the anomaly is determined from the difference profile and the estimated location.

公开(公告)号：EP3855138A1

公开(公告)日：2021-07-28

申请号：EP20305062.0

申请日：2020-01-24

申请人： Nokia Solutions and Networks Oy ,  Nokia Technologies Oy

发明人： AWWAD, Elie ,  DORIZE, Christian ,  GUERRIER, Sterenn

IPC分类号： G01H9/00 ,  G01M11/00 ,  G01V1/20

摘要： An optical sensing system for detecting fiber events along an optical cable under test (CUT) having forward and feedback fibers and multiple pairs of optical couplers interconnected along the forward and feedback fibers in a ladder topology. An optical transmitter generates an optical probing signal for a forward fiber, wherein the couplers along the forward fiber provide tapped portions of the probing signal to the couplers along a feedback fiber to form a combined optical feedback signal in the feedback fiber. A reference coupler is connected between the transmitter and the forward fiber to tap an optical reference signal from the probing signal, and a feedback coupler is connected to combine the reference signal and the feedback signal. An optical receiver receives and processes the combined reference and feedback signals from the feedback coupler to detect fiber events along the CUT.

公开(公告)号：EP3404853A1

公开(公告)日：2018-11-21

申请号：EP17305579.9

申请日：2017-05-18

申请人： Nokia Solutions and Networks Oy

发明人： DUMENIL, Arnaud ,  AWWAD, Elie ,  MEASSON, Cyril

IPC分类号： H04B10/2507

摘要： An optical communications system (100) including a multi-channel optical transmitter (1) comprising a plurality of symbol generators (12), each symbol generator (12) being configured for generating a symbol stream (121), a digital mapping module (13) for performing a mapping on each symbol vector, an emission unit (10) configured for emitting a multi-channel signal (8) carrying the symbol vectors, and a multi-channel optical receiver (3) comprising a reception unit (20) configured for extracting symbol vectors, a digital inverse mapping module (23) for performing the inverse mapping on the received symbol vector, and for reconstructing the data streams from the restored symbol vectors.