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    METHODS AND DEVICES FOR THE DETERMINATION OF CORE DEPENDENT LOSS IN MULTI-CORE FIBER TRANSMISSION SYSTEMS USING CORE SCRAMBLING
    1.
    发明申请
    METHODS AND DEVICES FOR THE DETERMINATION OF CORE DEPENDENT LOSS IN MULTI-CORE FIBER TRANSMISSION SYSTEMS USING CORE SCRAMBLING 有权

    公开(公告)号：US20210050918A1

    公开(公告)日：2021-02-18

    申请号：US17049308

    申请日：2019-04-10

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

    IPC: H04B10/2525 ,  H04B10/50 ,  H04B10/2581

    Abstract: The various embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel comprising a multi-core fiber, the data being carried by optical signals, the optical signals propagating along the multi-core fiber according to two or more cores, the multi-core fiber being associated with fiber parameters and misalignment losses values, at least one scrambling device being arranged in the optical fiber transmission channel for scrambling the two or more cores according to a scrambling function, wherein the optical fiber transmission channel comprises a system configuration device configured to determine a core dependent loss value depending on the fiber parameters, at least one misalignment loss, a number of the at least one scrambling device, and the scrambling function.

    METHOD AND SYSTEM OF OPTICAL FIBRE WITH SWITCHING OF MODES AND/OR CORES
    2.
    发明申请
    METHOD AND SYSTEM OF OPTICAL FIBRE WITH SWITCHING OF MODES AND/OR CORES 审中-公开

    公开(公告)号：US20170195052A1

    公开(公告)日：2017-07-06

    申请号：US15322612

    申请日：2015-06-26

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Elie AWWAD ,  Ghaya REKAYA-BEN OTHMAN ,  Yves JAOUEN

    IPC: H04B10/2581

    CPC classification number: H04B10/2581 ,  H04B10/2507 ,  H04J14/04

    Abstract: The invention relates to a system and a method for transmission over optical fiber (130) with mode or core scrambling. The system comprises a spatio-temporal encoder (110) and a plurality of modulators (1251, . . . , 125n) associated, respectively, with separate propagation modes or cores of said fiber, each modulator modulating a laser beam. Said fiber comprises a plurality of slices (1301, . . . , 130L), an amplifier (140l) being provided between any two consecutive slices of the optical fiber. A mode scrambler (150l) is associated with each amplifier in order to perform a permutation of said modes between at least two consecutive slices.

    SPACE-TIME CODING METHODS AND DEVICES FOR OPTICAL MIMO SYSTEMS
    5.
    发明申请
    SPACE-TIME CODING METHODS AND DEVICES FOR OPTICAL MIMO SYSTEMS 审中-公开

    公开(公告)号：US20170331553A1

    公开(公告)日：2017-11-16

    申请号：US15593402

    申请日：2017-05-12

    Applicant: INSTITUT MINES-TELECOM

    Inventor： El-Medhi AMHOUD ,  Ghaya REKAYA BEN-OTHMAN ,  Yves JAOUEN

    IPC: H04B10/2581 ,  H04L5/00 ,  H04B7/0456

    CPC classification number: H04B10/2581 ,  H04B7/0456 ,  H04B10/516 ,  H04L1/0618 ,  H04L5/0003 ,  H04L5/0023

    Abstract: Embodiments of the invention provide a Space-Time coding device for encoding a digital data sequence according to a predefined space-time coding rate, said data sequence comprising a set of modulated symbols to be transmitted over at least two propagation modes, during a number of time slots, through an optical transmission channel in a single-core multimode optical fiber transmission system, wherein the device comprises: a codebook generator (53) configured to determine a set of codeword matrices defining a space-time code represented by a space dimension and a temporal dimension, each codeword matrix comprising complex values and a number of columns equal to said code temporal dimension, and a number of rows equal to said code space dimension, the codebook generator (53) being further configured to associate a difference codeword matrix and a distance metric to each pair of codeword matrices among said set of codeword matrices, each component of a difference codeword matrix associated with a given pair of codeword matrices being equal to the difference between the corresponding components of the codeword matrices of said pair, the distance metric associated with a given pair of codeword matrices being determined by computing the Euclidean norm of the difference codeword matrix associated with said pair, wherein the codebook generator (53) is configured to select the components of the codeword matrices depending on the number of pairs of codeword matrices that are associated with a unitary difference codeword matrix and with a distance metric equal to a given Euclidean distance; and an encoding unit (55) configured to encode said set of modulated symbols into a codeword matrix selected from said set of codeword matrices.

    OPTICAL TRANSMISSION SYSTEM AND METHOD FOR CORE SCRAMBLING FOR MULTICORE OPTICAL FIBERS
    6.
    发明申请
    OPTICAL TRANSMISSION SYSTEM AND METHOD FOR CORE SCRAMBLING FOR MULTICORE OPTICAL FIBERS 有权

    公开(公告)号：US20210376929A1

    公开(公告)日：2021-12-02

    申请号：US17050351

    申请日：2019-04-10

    Applicant: INSTITUT MINES TELECOM

    Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

    IPC: H04B10/2581 ,  H04B10/2507 ,  H04B10/50 ,  H04B10/516 ,  H04B10/60 ,  H04J14/02

    Abstract: The various embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel made of a multi-core fiber, optical signals carrying the data propagate along the multi-core fiber according to two or more cores, each core being associated with one or more core parameters, wherein the optical transmission system comprises: a scrambling configuration device configured to determine a scrambling function depending on one or more of the core parameters associated with the two or more cores, and at least one scrambling device arranged in the optical fiber transmission channel for scrambling the two or more cores, each of the at least one scrambling device being configured to determine permuted cores by applying the scrambling function to the two or more cores and to redistribute the optical signals according to the permuted cores.

    OPTICAL TRANSMISSION SYSTEM AND METHOD FOR CORE SELECTION IN MULTI-CORE FIBERS
    8.
    发明申请
    OPTICAL TRANSMISSION SYSTEM AND METHOD FOR CORE SELECTION IN MULTI-CORE FIBERS 有权

    公开(公告)号：US20210058155A1

    公开(公告)日：2021-02-25

    申请号：US17050358

    申请日：2019-04-10

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Ghaya REKAYA ,  Akram ABOUSEIF ,  Yves JAOUEN

    IPC: H04B10/2525 ,  H04B10/50 ,  H04B10/2581

    Abstract: Embodiments provide an optical transmission system comprising an optical transmitter configured to transmit data over an optical fiber transmission channel comprising a multi-core fiber, the data being carried by one or more optical signals propagating along the multi-core fiber according to a plurality of cores, each core among the plurality of cores being associated with one or more core parameters, wherein the optical transmission system comprises a core selection device configured to select a set of transmit cores among the plurality of cores according to a transmit core selection criterion, the transmit core selection criterion being related to the one or more core parameters, the optical transmitter being configured to transmit the data over the set of transmit cores.

    METHOD FOR SELECTING MODES FOR TRANSMISSION OVER MULTIMODE OR MULTICORE OPTICAL FIBRES
    9.
    发明申请
    METHOD FOR SELECTING MODES FOR TRANSMISSION OVER MULTIMODE OR MULTICORE OPTICAL FIBRES 审中-公开

    公开(公告)号：US20170264367A1

    公开(公告)日：2017-09-14

    申请号：US15508775

    申请日：2015-09-04

    Applicant: INSTITUT MINES-TELECOM

    Inventor： Elie AWWAD ,  Ghaya REKAYA-BEN OTHMAN ,  Yves JAOUEN

    IPC: H04B10/2581 ,  H04B7/0413 ,  H04B10/079

    CPC classification number: H04B10/2581 ,  H04B7/0413 ,  H04B10/0795 ,  H04J14/04

    Abstract: The invention relates to a mode selection method for a system for MIMO transmission on an optical fiber of multimode type. It comprises a step of measuring the transfer matrix of the transmission channel made up of a set of modes of the optical fiber (110), a step of transforming (120) the transfer matrix into a block diagonal matrix, each block being associated with a mode subset, a step of determining (130) the gain and/or the transmission capacity for each of the mode subsets, and a selection (140) of the mode subset corresponding to the highest gain and/or capacity, the MIMO transmission system then using only the modes of the subset thus selected to transmit on the optical fiber.The invention relates also to a core selection method for a system for MIMO transmission on optical fiber of multicore type.

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