Modeling the Kerr Comb of a Pulse Pumped F-P Microresonator With Normal Dispersion

Fiber-based Fabry-Pérot (F-P) microresonator is an attractive Kerr resonator platform that has the advantages of easy coupling, simple mode profiles, and flexible dispersion engineering. Due to its relatively low nonlinear coefficient, fiber F-P microresonator usually adopts the pulsed pump scheme. However, there is still a lack of linear stability analysis for the pulsed-driven F-P microresonator, resulting in inaccurate predictions of intracavity power and phase-matching wavelength. In this article, we derived the steady-state solution and phase-matching equation of the pulse-driven F-P microresonator. The correctness of the derived equation is verified by the numerical simulation and experiments performed in a pulse-driven normal-dispersion F-P microresonator. The obtained equations can not only improve the prediction accuracy of intracavity power (error reduced from 59.8% to 2%) and dispersive waves (error reduced from 8.3% to 1.2%), but also expand the prediction range of dispersive waves with respect to the pump-resonance detuning. Moreover, we have experimentally presented that pulse-driven platicon can achieve high power conversion efficiency of 23.4%, large spectral tuning range of 1.3 THz, long-term stability up to 10 hours, and low phase noise. This work complements the steady-state soliton analysis and dispersive wave model in F-P microresonator, and can provide a guide to design and analyze the microcomb spectra in the normal-dispersion regime.