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Updated: May 16, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Modeling and characterization of a few-mode EDFA supporting four mode groups for mode division multiplexing
Guillaume Le Cocq1, Laurent Bigot, Antoine Le Rouge
1PhLAM/IRCICA, Université Lille1, CNRS UMR8523/USR3380, 59658 Villeneuve d’Ascq, France. guillaume.le-cocq@phlam.univ-lille1.fr
Abstract:
Numerical and experimental study of a Few-Mode (FM) Erbium Doped Fiber Amplifier (EDFA) suitable for mode division multiplexing (MDM) is reported. Based on numerical simulations, a Few-Mode Erbium Doped Fiber (FM-EDF) has been designed to amplify four mode groups and to equally amplify LP11 and LP21 mode groups with gains greater than 20 dB and with a differential modal gain of less than 1 dB. Experimental results confirmed the simulations with a good concordance. This modal gain equalization is obtained by tailoring the erbium spatial distribution in the fiber core with a ring-shaped profile.
