Generation of platicons and frequency combs in optical microresonators with normal GVD by modulated pump

TL;DR

This paper demonstrates the generation of platicons and frequency combs in optical microresonators with normal GVD using amplitude or bichromatic pump modulation, expanding the methods for comb generation.

Contribution

It introduces a new approach to excite platicons and frequency combs in normal GVD microresonators via pump modulation techniques.

Findings

Flat-topped dissipative solitonic pulses can be excited with modulation.

Frequency combs are generated using amplitude or bichromatic pump.

Soft excitation occurs within specific modulation parameters.

Abstract

We demonstrate that flat-topped dissipative solitonic pulses, platicons, and corresponding frequency combs can be excited in optical microresonators with normal group velocity dispersion using either amplitude modulation of the pump or bichromatic pump. Soft excitation may occur in particular frequency range if modulation depth is large enough and modulation frequency is close to the free spectral range of the microresonator.