Frequency combs and platicons in optical microresonators with normal GVD

TL;DR

This paper predicts and proposes methods to generate novel flat-top dissipative solitonic pulses, called platicons, in optical microresonators with normal GVD, with tunable duration and spectrum transformation.

Contribution

It introduces the concept of platicons in normal GVD microresonators and suggests practical generation methods from continuous wave pump sources.

Findings

Prediction of platicons in normal GVD microresonators.

Demonstration of spectrum transformation from dark solitons to platicons.

Proposed generation techniques using various pump configurations.

Abstract

We predict the existence of a novel type of the flat-top dissipative solitonic pulses, "platicons", in microresonators with normal group velocity dispersion (GVD). We propose methods to generate these platicons from cw pump. Their duration may be altered significantly by tuning the pump frequency. The transformation of a discrete energy spectrum of dark solitons of the Lugiato-Lefever equation into a quasicontinuous spectrum of platicons is demonstrated. Generation of similar structures is also possible with bi-harmonic, phase/amplitude modulated pump or via laser injection locking.