Institut Mines-telecom

Elie Awwad

Yves Jaouen

Ghaya Rekaya-Ben Othman

Yves JAOUËN

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

Method and system of optical fibre with switching of modes and/or cores

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 (), a step of transforming () the transfer matrix into a block diagonal matrix, each block being associated with a mode subset, a step of determining () the gain and/or the transmission capacity for each of the mode subsets, and a selection () 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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Paris, France

Elie Awwad