Advanced Dispersion Engineering of Dispersive Waves in Si3N4 Microresonators

Microresonator-based frequency combs are of great interest as a platform for dissipative Kerr Solitons which have demonstrated their excellence in a number of applications [1]. The majority of them rely on the broad and flat comb spectra, which require careful and precise design of the dispersion through its geometry. Although major progress has been made in achieving tailored frequency combs with dispersion engineering [2], the latter has relied on simple geometric variation of single-core waveguides. In contrast, an arbitrary dispersion engineering is often a complex task, especially when the dispersion needs to be designed in a wide range with high precision.