Multi-peak vector soliton families in defocusing Kerr resonators

TL;DR

This paper discovers and analyzes multi-peak vector soliton families in defocusing Kerr resonators, revealing diverse stable structures and their potential for tunable optical frequency combs in dissipative systems.

Contribution

It introduces the existence of multi-peak vector solitons in normally dispersive Kerr resonators and analyzes their stability and diversity using snakes-and-ladder diagrams and coupled equations.

Findings

Existence of multi-peak vector solitons in Kerr resonators.

Diverse soliton families including dark-bright and flat-topped structures.

Stable vector solitons with tunable peak numbers.

Abstract

We report the existence of multi-peaked vector soliton families in normally dispersive passive Kerr resonators. Through cross-phase modulation between two orthogonal polarization components, each peak becomes tightly interlocked, enabling robust localization of the entire wave packet in defocusing cavities. Analysis using snakes-and-ladder diagrams demonstrates the diversity of these vector soliton families, which include dark-bright multi-peak solitons, flat-topped solitons, and modulation instability patterns, among others. Furthermore, stability analysis based on the coupled Lugiato-Lefever equations reveals that specific combinations of parameters can sustain stable vector cavity solitons, whose peak numbers can be continuously tuned by adding appropriate perturbations. These findings significantly expand the scope of soliton dynamics and optical frequency comb generation in pumped-dissipative systems, independent of dispersion conditions.