公开(公告)号：US10753824B2

公开(公告)日：2020-08-25

申请号：US16341731

申请日：2017-11-21

Applicant: Xieon Networks S.à.r.l.

Inventor： Lutz Rapp

IPC: G01M11/00

Abstract: A method of distinguishing whether a detected change in reflected power in an optical time domain reflectometer (OTDR) measurement carried out in a fiber optic transmission system (16) using an OTDR is caused by a an event causing actual attenuation or a change in a mode field diameter, comprising the steps of emitting a succession of first sampling light pulses of a first wavelength into the fiber optic transmission system (16) while a pumping signal with a second wavelength is emitted into the fiber optic transmission system (16), and measuring a first OTDR trace (34′) resulting from the reflection of the first sampling light pulses in the fiber optic transmission system (16), such that the first sampling light pulses and their reflections interact with the pumping signal via stimulated Raman scattering. The method further comprises a step (36) of determining, based at least on information extracted from the first OTDR trace (34′), whether the detected change is mainly due to an event causing actual attenuation or to a change in the mode field diameter in the fiber optic transmission system (16).

公开(公告)号：US11287352B2

公开(公告)日：2022-03-29

申请号：US16093038

申请日：2017-05-24

Applicant: Xieon Networks S.à.r.l.

Inventor： Lutz Rapp ,  Nuno Renato Duarte Pereira

IPC: G01M11/00

Abstract: A method for determining the position of an irregularity in an optical transmission fiber using an optical time domain reflectometer, the method comprising the steps of emitting a succession of sampling light pulses into the optical transmission fiber, detecting reflected light pulses resulting from the reflection of the sampling light pulses at the irregularity in the optical transmission fiber and generating corresponding time-dependent detection signals, wherein different delays are associated with detection signals corresponding to different sampling light pulses, obtaining a combined signal from the detection signals, and analyzing the combined signal for determining the position of the irregularity in the optical transmission fiber with respect to the optical time domain reflectometer, wherein the combined signal corresponds to a superposition of the detection signals.

公开(公告)号：US10142026B2

公开(公告)日：2018-11-27

申请号：US15661756

申请日：2017-07-27

Applicant: Xieon Networks S.à.r.l.

Inventor： Lutz Rapp

IPC: H04B10/00 ,  H04B10/291 ,  H04B10/077 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/30

Abstract: A Raman pumping arrangement for amplifying a data optical signal (40) has a Raman pump (12) for generating a Raman pump signal (44;45), an optical supervisory channel receiver (14) for receiving an optical supervisory channel signal (42) an amplification fiber (15) arranged such that the data optical signal (40), the optical supervisory channel signal (42), and the Raman pump signal (44;45) are transmitted therethrough; and a control unit (13) configured for controlling the operation of the Raman pump (12); wherein the control unit (13) is configured for setting the Raman pump (12) in an operation mode or a start-up mode; wherein in the operation mode, the Raman pump (12) provides an operation pumping power (120), and wherein in the start-up mode, the Raman pump (12) provides a start-up pumping power (122).

公开(公告)号：US11088775B2

公开(公告)日：2021-08-10

申请号：US16462845

申请日：2017-11-21

Applicant: Xieon Networks S.à.r.l.

Inventor： Danish Rafique ,  Lutz Rapp

IPC: H04J14/02

Abstract: Disclosed herein is a method of transmitting a data stream from a first location to a second location through an optical network, as well as a corresponding performance monitoring unit, a transmitting arrangement and a receiving arrangement. The method comprises the steps of transmitting said data stream from said first location to said second location along a working path, wherein said data stream is transmitted in the form of a super channel comprising a number of n wavelengths within a predefined reserved wavelength range, monitoring the performance of the transmission based on the super channel signal received at said second location, and in case the performance is observed to drop below a predetermined performance threshold, unburdening the super channel from a part of said data stream while maintaining the reserved wavelength range for said super channel, by redirecting said part of the data stream for transmittal along at least one restoration path connecting said first and second locations, and transmitting the remainder of said data stream within the super channel on a number of wavelengths that is less than n, and/or with a reduced transmission rate for at least some of the wavelengths in said super channel.

公开(公告)号：US20210184775A1

公开(公告)日：2021-06-17

申请号：US16647370

申请日：2018-09-14

Applicant: Xieon Networks S.à.r.l.

Inventor： Stefano Calabro ,  Lutz Rapp ,  Bernhard Spinnler

IPC: H04B10/58 ,  H04B10/2507 ,  H04B10/564

Abstract: A method for determining a model representation for an optical transmitter comprises determining a quantity of a subsequence of output signals of an optical transmitter, the output signals being emitted in response to a sequence of input signals provided to the optical transmitter, and determining a model representation for the optical transmitter based on the determined quantity, wherein the quantity only represents a part of the information encoded in the subsequence of the output signals.

公开(公告)号：US10775318B2

公开(公告)日：2020-09-15

申请号：US16092825

申请日：2017-06-01

Applicant: Xieon Networks S.à.r.l.

Inventor： Lutz Rapp

IPC: G01N21/94 ,  B01D46/00 ,  H05K7/20 ,  G01N21/956

Abstract: A system (10) for detecting a level of dirtiness of a filter mat (20) of an airflow cooling system for telecommunications equipment, the system (10) comprising a detector (12) for detecting fluorescent or reflected light backscattered at at least one part in (22) of the filter mat (20) comprising or treated with a fluorescent or reflective material, wherein the detector (12) comprises a light source (12a) for illuminating said at least one part (22) of the filter mat (20) with sampling light, and a photosensor (12b) for detecting fluorescent or reflected light backscattered at said at least one part (22) of the filter mat (20) caused by the illumination thereof with sampling light, wherein the system (10) is configured for inferring the level of dirtiness of the filter mat (20) from the amount of detected fluorescent or reflected light.