Journal
OPTICS EXPRESS
Volume 20, Issue 24, Pages 27051-27061Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.027051
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Funding
- French government [ANR-09-VERS-010]
- Ministry of Higher Education and Research
- Nord-Pas de Calais Regional Council
- FEDER through the Contrat de Projets Etat Region (CPER)
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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. (C) 2012 Optical Society of America
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