Spatio-Temporal Dynamics of Pulses in Multimode Fibers

Abstract

Spatial modes in multimode fibers interact with each other through nonlinear processes leading to various spatio-temporal dynamics. Studying the dynamics of such interactions can open a new route for understanding ultrafast modal phenomena.In this research, we measure the temporal and spatial dynamics of ultrafast multimode signals in a high temporal resolution. We study the modal dynamics of each spatial mode inside multimode fibers as a function of time, intensity, and wavelength. We derive the spatial coupling, identify the energy transfer between the modes, and show that it is possible to transfer the energy even when the overlap integral vanishes and the coupling between the modes is zero.

Keywords: Time-lens, nonlinear interaction, multimode dynamics