Origin of spontaneous wave mixing processes in multimode GRIN fibers

A. Bendahmane (1) , M. Conforti (1) , O. Vanvincq (1) , C. Mas Arabí (1) , A. Mussot (1) , A. Kudlinski (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

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.

Domaines: Formation de Structures et Solitons [nlin.PS]; Optique / photonique

A. Bendahmane, M. Conforti, O. Vanvincq, C. Mas Arabí, A. Mussot, et al.. Origin of spontaneous wave mixing processes in multimode GRIN fibers. Optics Express, 2021, 29 (19), pp.30822. ⟨10.1364/OE.436229⟩. ⟨hal-03499891⟩