Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 37: Ultrashort Laser Pulses
Q 37.7: Talk
Wednesday, March 11, 2020, 15:30–15:45, f435
Triggering Dispersive Waves via XPM in Si3N4 Integrated Optical Waveguides — •Maximilian Timmerkamp1, Niklas M. Lüpken1, and Carsten Fallnich1,2 — 1Institute of Applied Physics, University of Münster, Corrensstraße 2, 48149 Münster, Germany — 2MESA+ Institute for Nanotechnology, University of Twente, Enschede 7500 AE, The Netherlands
Supercontinua are of high interest in current research due to their broad bandwidth and high brightness enabling a manifold of applications in, e.g., spectroscopy or precision metrology.
Typically, a higher-order soliton is formed during the supercontinuum generation process, which is perturbed by higher-order dispersion leading to the fission into fundamental solitons, each radiating energy into a dispersive wave [1]. These dispersive waves propagate in the same transverse mode as the corresponding solitons.
In multi-mode waveguides, nonlinear coupling allows for energy exchange between transverse modes. In this contribution, we show an experimental evidence of soliton dynamics in multi-mode silicon nitride (Si3N4) waveguides, where a dispersive wave is generated in a different transverse mode than the pump mode, triggered by intermodal cross-phase modulation. These intermodal soliton dynamics lead to new phase-matching conditions, enabling the generation of new frequencies.
[1] Roy et al., Phys. Rev. A 79, 023824 (2009)