Open AccessOrigin of spontaneous wave mixing processes in multimode GRIN fibers
Author(s) -
Abdelkrim Bendahmane,
Matteo Conforti,
Olivier Vanvincq,
Carlos Mas Arabí,
Arnaud Mussot,
Alexandre Kudlinski
Publication year - 2021
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.436229
Subject(s) - multi mode optical fiber , optics , phase matching , mixing (physics) , parametric statistics , four wave mixing , dispersion (optics) , phase conjugation , degenerate energy levels , physics , wavelength , refractive index , instability , zero dispersion wavelength , optical fiber , nonlinear optics , mathematics , quantum mechanics , laser , statistics , plastic optical fiber
We show that geometric parametric instability (GPI) in graded-index multimode fibers is strongly influenced by higher-order dispersion. By measuring the output spectrum for different core radii, we distinguish peaks generated by GPI from other coexisting parametric processes using phase-matching arguments and numerical simulations. We highlight for the first time a non-degenerate GPI process involving two pumps at different wavelengths.