Intracavity incoherent supercontinuum dynamics and rogue waves in a broadband dissipative soliton laser
Résumé
Understanding dynamical complexity is one of the most important
challenges in science. Significant progress has recently been made in
optics through the study of dissipative soliton laser systems, where
dynamics are governed by a complex balance between nonlinearity,
dispersion, and energy exchange. A particularly complex regime of such
systems is associated with noise-like pulse multiscale instabilities,
where sub-picosecond pulses with random characteristics evolve
chaotically underneath a much longer envelope. However, although
observed for decades in experiments, the physics of this regime remains
poorly understood, especially for highly-nonlinear cavities generating
broadband spectra. Here, we address this question directly with a
combined numerical and experimental study that reveals the physical
origin of instability as nonlinear soliton dynamics and supercontinuum
turbulence. Real-time characterisation reveals intracavity extreme
events satisfying statistical rogue wave criteria, and both real-time
and time-averaged measurements are in quantitative agreement with
modelling.
Domaines
Optique [physics.optics]Origine | Fichiers produits par l'(les) auteur(s) |
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