Bendahmane A, Conforti M, Vanvincq O, Mas Arabí C, Mussot A, Kudlinski A
Opt Express. 2021 Sep 13;29(19):30822-30833. doi: 10.1364/OE.436229.
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.
