Open AccessTheoretical study of gain-induced mode coupling and mode beating in few-mode optical fiber amplifiers
Author(s) -
Jean-Baptiste Trinel,
Guillaume Le Cocq,
Yves Quiquempois,
Esben Ravn Andresen,
Olivier Vanvincq,
Laurent Bigot
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.002377
Subject(s) - optics , mode volume , mode (computer interface) , optical amplifier , coupling (piping) , amplifier , radiation mode , physics , modal , equilibrium mode distribution , erbium doped fiber amplifier , mode scrambler , multi mode optical fiber , single mode optical fiber , optical fiber , fiber amplifier , mode coupling , materials science , optoelectronics , plastic optical fiber , computer science , laser , cmos , polymer chemistry , metallurgy , operating system
We developed a generalized field-propagating model for active optical fibers that takes into account mode beating and mode coupling through the amplifying medium. We applied the model to the particular case of a few-mode erbium doped fiber amplifier. Results from the model predict that mode coupling mediated by the amplifying medium is very low. Furthermore, we applied the model to a typical amplifier configuration. In this particular configuration, the new model predicts much lower differential modal gain than that predicted by a classical intensity model.