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Novel dynamics of Kerr resonators: from rational harmonic driving to soliton symmetry breaking

Coherently driven Kerr microresonators have attracted significant interest due to their ability to produce optical frequency combs with attractive characteristics. Of particular significance has been the realisation that such resonators can sustain pulses of light known as dissipative Kerr cavity solitons. Here we discuss recent advances related to the generation of repetition-rate-tunable soliton combs and describe novel soliton dynamics that can manifest themselves in multimode resonators. We introduce rational harmonic driving as a new pulsed pumping modality that allows access to a variety of repetition rates, and we show that cavity solitons can undergo spontaneous symmetry breaking in multimode resonators.