Walk-Off-Induced Modulation Instability, Temporal Pattern Formation, and Frequency Comb Generation in Cavity-Enhanced Second-Harmonic Generation
Artikel i vetenskaplig tidskrift, 2016

We derive a time-domain mean-field equation to model the full temporal and spectral dynamics of light in singly resonant cavity-enhanced second-harmonic generation systems. We show that the temporal walk-off between the fundamental and the second-harmonic fields plays a decisive role under realistic conditions, giving rise to rich, previously unidentified nonlinear behavior. Through linear stability analysis and numerical simulations, we discover a new kind of quadratic modulation instability which leads to the formation of optical frequency combs and associated time-domain dissipative structures. Our numerical simulations show excellent agreement with recent experimental observations of frequency combs in quadratic nonlinear media [Phys. Rev. A 91, 063839 (2015)]. Thus, in addition to unveiling a new, experimentally accessible regime of nonlinear dynamics, our work enables predictive modeling of frequency comb generation in cavity-enhanced second-harmonic generation systems. We expect our findings to have wide impact on the study of temporal and spectral dynamics in a diverse range of dispersive, quadratically nonlinear resonators.

Författare

F. Leo

University of Auckland

Tobias Hansson

Chalmers, Fysik, Kondenserade materiens teori

Universita degli Studi di Brescia

I. Ricciardi

CNR-INO

M. De Rosa

CNR-INO

S. Coen

University of Auckland

S. Wabnitz

Universita degli Studi di Brescia

CNR-INO

M. Erkintalo

University of Auckland

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 116 3 033901

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1103/PhysRevLett.116.033901

Mer information

Senast uppdaterat

2022-04-06