Abstract

Dissipative Kerr solitons (DKSs) in continuous-wave (CW) laser-driven microresonators enable ultra-fast sources and optical frequency combs with high repetition rates up to few THz [1]. The frequency comb spectra are defined by two degrees of freedom: an offset frequency and line spacing (i.e. repetition rate). While the CW pump laser defines the center frequency of the spectrum, the line spacing is susceptible to fluctuations due to technical and fundamental noise sources. Reducing these fluctuations and stabilizing the repetition rate is essential to many application such as optical communication, low-noise signal generation or precision spectroscopy, and active control and/or stabilization may be required. As an alternative, all-optical stabilization based on injecting a CW laser into the wing of the comb, has been studied theoretically [2], describing the locking of the closest DKS comb line to the CW laser, an effect similar to parametric seeding [3].

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