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.

Walk-off-induced modulation instability, temporal pattern formation, and frequency comb generation in cavity-enhanced second-harmonic generation / Leo, F.; Hansson, Hans Evert Tobias; Ricciardi, I.; De Rosa, M.; Coen, S.; Wabnitz, Stefan; Erkintalo, M.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 116:3(2016), pp. 1-6. [10.1103/PhysRevLett.116.033901]

Walk-off-induced modulation instability, temporal pattern formation, and frequency comb generation in cavity-enhanced second-harmonic generation

WABNITZ, Stefan;
2016

Abstract

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.
2016
dynamics; frequency domain analysis; harmonic analysis
01 Pubblicazione su rivista::01a Articolo in rivista
Walk-off-induced modulation instability, temporal pattern formation, and frequency comb generation in cavity-enhanced second-harmonic generation / Leo, F.; Hansson, Hans Evert Tobias; Ricciardi, I.; De Rosa, M.; Coen, S.; Wabnitz, Stefan; Erkintalo, M.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 116:3(2016), pp. 1-6. [10.1103/PhysRevLett.116.033901]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1214817
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