title: Observation of multimode solitons in few-mode fiber.
abstract: We experimentally isolate and directly observe multimode solitons in few-mode graded-index fiber. We rely on Raman frequency shifts to spectrally isolate these multimode solitons. By varying the input energy and modal composition of the launched pulse, we observe a continuous variation of multimode solitons with different spatiotemporal properties. They exhibit an energy-volume relation that is distinct from those of single-mode and fully spatiotemporal solitons.
authors.forename: Zimu
authors.initials: Z
authors.lastname: Zhu
authors.forename: Logan G
authors.initials: LG
authors.lastname: Wright
authors.forename: Demetrios N
authors.initials: DN
authors.lastname: Christodoulides
authors.forename: Frank W
authors.initials: FW
authors.lastname: Wise