Generalised Kerr Microcomb Physics in Synchronously Driven Systems

Miles Henry Anderson
2023
Thèse EPFL

In this thesis, the generation of microcombs under complex, non-trivial, and/or higher-order cavity conditions is explored, both in theory & simulation, and in practical experimentation. Pulse-driving of microresonators is investigated for the generation and temporal guiding of localised dissipative structures. The effect of pulse-driving in contrast to constant-wave driving is explored in terms of energy conversion efficiency and the nonlinear transfer of noise from the input to the output light. The generation of localised dissipative structures under arbitrary dispersion is investigated, including for dissipative solitons in pure or perturbed anomalous dispersion, switching waves in normal dispersion, and zero-dispersion solitons that exist in pure third-order dispersion between anomalous and normal. The existence of these localised dissipative structures in non-trivial resonators where the propagation constants vary with distance is studied, with particular attention for longitudinally modulated dispersion. In these resonators, coherent higher-order dispersive waves on solitons, and the emergence of Faraday-wave satellite structures on switching waves are experimentally observed and analysed according to Floquet theory.

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Miles Henry Anderson
2023
Thèse EPFL

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https://infoscience.epfl.ch/record/303525?ln=fr

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Concepts associés (33)

Publications associées (36)

MOOCs associés (5)

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vignette|Dispersion de la lumière blanche au passage d'un dioptre. En mécanique ondulatoire, la dispersion est le phénomène affectant une onde se propageant dans un milieu dit « dispersif », c'est-à-dire dans lequel les différentes longueurs d’onde constituant l'onde ne se propagent pas à la même vitesse. On rencontre ce phénomène pour tous types d'ondes, comme la lumière, le son et les ondes mécaniques (vagues, séismes, etc.). À l'exception du vide, tous les milieux sont dispersifs à des degrés divers.

Dispersion (water waves)

In fluid dynamics, dispersion of water waves generally refers to frequency dispersion, which means that waves of different wavelengths travel at different phase speeds. Water waves, in this context, are waves propagating on the water surface, with gravity and surface tension as the restoring forces. As a result, water with a free surface is generally considered to be a dispersive medium. For a certain water depth, surface gravity waves – i.e.

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Un soliton est une onde solitaire qui se propage sans se déformer dans un milieu non linéaire et dispersif. On en trouve dans de nombreux phénomènes physiques de même qu'ils sont la solution de nombreuses équations aux dérivées partielles non linéaires. thumb|Soliton hydrodynamique. Le phénomène associé a été observé pour la première fois en 1834 par l'Écossais John Scott Russell qui l'a observé initialement en se promenant le long d'un canal : il a suivi pendant plusieurs kilomètres une vague remontant le courant qui ne semblait pas vouloir faiblir.

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Dissipative Solitons and Switching Waves in Dispersion-Modulated Kerr Cavities

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We theoretically and experimentally investigate the formation of dissipative coherent structures in Kerr nonlinear optical microresonators, whose spectrum encompasses an integrated dispersion that exceeds the cavity free-spectral range. We are able to acce ...

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Zero dispersion Kerr solitons in optical microresonators

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Solitons are shape preserving waveforms that are ubiquitous across nonlinear dynamical systems from BEC to hydrodynamics, and fall into two separate classes: bright solitons existing in anomalous group velocity dispersion, and switching waves forming 'dark ...

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