At a more fundamental level, our results are expected to further facilitate our understanding of the underlying physics associated with these complex “many-body” nonlinear processes. Effects arising from different soliton modal compositions can also be accounted for, using this model. These theoretical predictions are experimentally and numerically corroborated in both parabolic and step-index multimode silica waveguides. Our analysis reveals that this broadband dispersive wave emission is a direct byproduct of the nonlinear merging of the constituent modes comprising the resulting multimode soliton entities, and is possible in both the normal and anomalous dispersive regions. Here, we provide a comprehensive theory capable of explaining the distinct Cherenkov radiation lines produced during multimode soliton fission events taking place in nonlinear multimode optical fibers. However, this same complexity has introduced a formidable challenge in understanding these newly emerging physical phenomena. In addition, the multifaceted nature of this platform, arising from the complexity associated with hundreds and thousands of interacting modes, has provided a fertile ground for observing novel physical effects.

Multimode fibers are nowadays intensely pursued in terms of addressing longstanding issues related to information bandwidth and implementing new classes of high-power laser sources. Advancements in computational capabilities along with the possibility of accessing high power levels have stimulated a reconsideration of multimode fibers.

Observation theory