Omnipresent coexistence of rogue waves in a nonlinear two-wave interference system and its explanation by modulation instability

Year: 2021

Authors: Pan C.; Bu L.; Chen S.; Mihalache D.; Grelu P.; Baronio F.

Autors Affiliation: School of Physics and Quantum Information Research Center, Southeast University, Nanjing 211189, China; Department of Theoretical Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, Magurele-Bucharest, RO-077125, Romania; Laboratoire ICB, U.M.R. 6303 C.N.R.S., University Bourgogne Franche-Comty, 9 avenue A. Savary, F-21078 Dijon, France; INO CNR and Dipartimento di Ingegneria dell?Informazione, Universita di Brescia, Via Branze 38, 25123 Brescia, Italy

Abstract: We investigate the coexisting rogue wave dynamics associated with two fundamental-frequency optical waves interacting in a quadratic nonlinear medium. Using the vector Chen-Lee-Liu nonlinear Schrtzdinger equation model, we obtain exact rogue wave solutions at first and higher orders on the more general periodic backgrounds. We unveil that the inherent self-steepening effect may allow an omnipresent rogue wave coexistence over a broad range of parameters in both the normal and anomalous dispersion regimes, in addition to allowing ultrastrong peak amplitudes. We also demonstrate that such universality of coexistence can be anticipated by the appearance of two peaks in the modulation instability spectrum. We numerically confirm the robustness of the coexisting Peregrine solitons against initial noise as well as their excitation from a turbulent wave field caused by modulation instability. We expect that these findings will shed light on the generation of extreme wave events resulting from the interference of multiple continuous-wave fields.


Volume: 3 (3)      Pages from: 033152-1  to: 033152-12

DOI: 10.1103/PhysRevResearch.3.033152