Abstract

Dissipative solitons in optical microcavities have attracted much attention in recent years due to their applicability to frequency comb technologies. A frequency comb can be thought of as an optical ruler with unprecedented precision. In this talk I will address the problem of generating soliton-comb in a microresonator made of a material characterised by quadratic nonlinearity. Such nonlinearity allows the so-called process of second harmonic generation, hence the potential formation of a soliton-comb in two separated regions of the light spectrum. The difference between group velocities of first and second harmonic comb is investigated theoretically and shown to be a key parameter to ensure the existence and the stability of second harmonic generated soliton-combs. Finally, the transition from soliton to dissipative breathers and to chaotic regimes will be discussed.