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    Adaptive constellation diagram reducing the impact of phase distortions
    1.
    发明授权
    Adaptive constellation diagram reducing the impact of phase distortions 有权

    公开(公告)号：US11581948B2

    公开(公告)日：2023-02-14

    申请号：US16074287

    申请日：2017-02-28

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Lutz Rapp

    IPC: H04B10/54 ,  H04B10/548 ,  H04B10/61 ,  H04B10/2537

    Abstract: Disclosed herein is a method of encoding and/or decoding data for optical data transmission along a transmission link, as well as corresponding transmitters and receivers. The data is encoded based on an adaptive constellation diagram in a 2-D plane, said constellation diagram including a first and a second pair of symbols, wherein the symbols of the first pair of symbols are located at opposite sides of the origin of the 2-D plane at a first distance di from each other, and wherein the symbols of the second pair of symbols are located at opposite sides of the origin of the 2-D plane at a second distance d2 from each other. The method comprises a step of adapting the constellation diagram by varying the ratio of the first and second distances d1, d2 such as to minimize or nearly minimize a bit error rate in the transmitted data.

    Automatic measurement of the noise performance of a transponder
    2.
    发明授权
    Automatic measurement of the noise performance of a transponder 有权

    公开(公告)号：US11558113B2

    公开(公告)日：2023-01-17

    申请号：US17040002

    申请日：2019-02-05

    Applicant: Xieon Networks S.A.R.L.

    Inventor： Stefano Calabrò ,  Lutz Rapp ,  Bernhard Spinnler

    IPC: H04B10/07 ,  H04B17/00 ,  H04B10/079 ,  H04B10/40 ,  H04B10/50 ,  H04B10/61

    Abstract: Disclosed herein is a transponder comprising a transmitter and a receiver. The transponder further comprises a receiver input amplifier, a bypass line, and a control unit configured for determining the performance of the transponder in relation to an OSNR related parameter, by controlling the transponder to generate a noise signal to be received by the receiver. The receiver input amplifier is operated to thereby cause ASE in the receiver input amplifier to facilitate the determination. A test signal is generated at the transmitter Said noise signal and said test signal, and/or one or more respective replicas thereof, are superimposed to form a combined signal to be received by said receiver to further facilitate determination of said performance related parameter based on said combined signal, wherein for generating said combined signal, said test signal is fed from the transmitter to the receiver by means of said bypass line.

    Codirectional ROPA supplied with power via a separate fiber transmitting data in opposite direction
    3.
    发明授权
    Codirectional ROPA supplied with power via a separate fiber transmitting data in opposite direction 有权

    公开(公告)号：US11201676B2

    公开(公告)日：2021-12-14

    申请号：US16087870

    申请日：2017-04-13

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Lutz Rapp ,  Nelson Costa

    IPC: H04B10/291 ,  H01S3/067 ,  H01S3/094 ,  H01S3/16 ,  H01S3/23

    Abstract: The invention discloses a method of amplifying an optical signal, in particular a data signal, transmitted from a first location (A) to a second location (B) via a first transmission link (10a), wherein said optical signal is amplified by means of a transmitter side remote optically pumped amplifiers (ROPA) (18) comprising a gain medium (24), wherein the gain medium (24) of said transmitter side ROPA (18) is pumped by means of transmitter side pump power (20) provided from said first location (A), characterized in that at least a part of said transmitter side pump power (20) is provided by means of light supplied from said first location (A) to said transmitter side ROPA (18) via a portion of a second transmission link (10b) provided for transmitting optical signals from said second location (B) to said first location (A).

    Compensation of signal distoration induced by a periodic optical copropagating optical signal
    4.
    发明授权
    Compensation of signal distoration induced by a periodic optical copropagating optical signal 有权

    公开(公告)号：US11581945B2

    公开(公告)日：2023-02-14

    申请号：US17310913

    申请日：2020-02-25

    Applicant: Xieon Networks S.A.R.L.

    Inventor： Lutz Rapp

    IPC: H04B10/071 ,  H04B10/69 ,  H04B10/2543 ,  H04B10/2507 ,  H04B10/2531 ,  H04B10/61

    Abstract: The disclosure relates to a method, an optical receiver and an optical system for compensating, at an optical receiver, signal distortions induced in an optical carrier signal by a periodic copropagating optical signal, wherein the optical carrier signal and the copropagating signal copropagate at least in part of an optical system or network, by: receiving, at the optical receiver, the optical carrier signal, wherein the optical carrier signal is distorted by the copropagating signal; determining, at the optical receiver, a period of a periodic component of the distorted optical carrier signal; determining, at the optical receiver, a periodic distortion of the distorted optical carrier signal; and generating a compensation signal to correct the distorted optical carrier signal according to the determined periodic distortion.

    Bidirectional and configurable directional Raman pumping apparatus
    6.
    发明授权
    Bidirectional and configurable directional Raman pumping apparatus 有权

    公开(公告)号：US11476938B2

    公开(公告)日：2022-10-18

    申请号：US16081594

    申请日：2017-03-09

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Tiago Mestre ,  Carlo Marques ,  Anton Schex ,  Lutz Rapp

    IPC: H04B10/291 ,  H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/131

    Abstract: A Raman pumping device (10) for amplifying a data optical signal in a fiber optic transmission system, comprising first and second ports (12a, 12b) through which the data optical signal may respectively enter and exit the Raman pumping device (10), a Raman pump source (14) for generating a Raman pump signal, and at least one combiner (16) for combining the Raman pump signal with the data optical signal. The Raman pumping device (10) allows for selectively combining the Raman pump signal generated by the same Raman pump source (14), or at least parts of the same Raman pump source (14) codirectionally or counterdirectionally with the data optical signal.

    Optical network and optical network element
    7.
    发明授权
    Optical network and optical network element 有权

    公开(公告)号：US10560189B2

    公开(公告)日：2020-02-11

    申请号：US15606492

    申请日：2017-05-26

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Lutz Rapp

    IPC: H04B10/27 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/04

    Abstract: An optical network is suggested, comprising a first set of optical fibers, a multimode multiplexer, a multimode amplifier, a multimode demultiplexer, and a second set of optical fibers, wherein the first set of optical fibers is connected via the multimode multiplexer to the multimode amplifier and wherein the multimode amplifier is connected via the multimode demultiplexer to the second set of optical fibers. Accordingly, an optical network element is provided.

    Pump power modulation in a feed-forward control for suppressing power transients
    8.
    发明授权
    Pump power modulation in a feed-forward control for suppressing power transients 有权

    公开(公告)号：US10177522B2

    公开(公告)日：2019-01-08

    申请号：US15512728

    申请日：2015-08-21

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Lutz Rapp

    IPC: H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/13 ,  H04B10/296 ,  H01S3/0941 ,  H01S3/16

    Abstract: Disclosed is a method of Controlling a gain of an optical amplifier comprising a gain medium and at least one pumping device. The method comprises the following steps: determining or predicting a change of input signal power to the amplifier, changing the pump power from an initial pump power level to a new pump power level at a first time instant, the initial pump power level being the pump power level applied to the amplifier prior to the change in input signal power, setting the pump power to a second pump power level at a second time instant, wherein the pump power level is varied in an oscillatory manner for at least one period of time starting at a third time instant and ending at a fourth time instant, wherein said third time instant is identical with or later than said first time instant and said fourth time instant is identical with or earlier than said second time instant.

    Fiber integrity monitoring
    9.
    发明授权
    Fiber integrity monitoring 有权

    公开(公告)号：US09841348B2

    公开(公告)日：2017-12-12

    申请号：US14769711

    申请日：2013-02-26

    Applicant: Xieon Networks S.a.r.l.

    Inventor： Lutz Rapp

    IPC: G02B6/44 ,  G01M11/00 ,  H04B10/079 ,  G02B6/255

    CPC classification number: G01M11/30 ,  G02B6/2558 ,  G02B6/4446 ,  G02B6/4454 ,  H04B10/0791

    Abstract: It is provided an apparatus, comprising a box configured to conduct an optical fiber from an exterior to an interior of the box; at least one of a mounting means adapted to mount a connecting means to which the optical fiber may be connected and a guiding means adapted to guide the optical fiber, wherein the at least one of the mounting means and the guiding means is arranged in the interior of the box; a detecting means arranged in the interior of the box adapted to detect a first signal from the interior of the box, wherein the first signal is at least one of a light and a smoke; wherein the interior of the box is substantially shielded from a second signal from an exterior of the box, and the detecting means is suitable to detect the second signal in a same manner as the first signal.

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