期刊
OPTICS EXPRESS
卷 27, 期 5, 页码 7098-7107出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.007098
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资金
- Leverhulme Trust [RPG-2015-456]
- Horizon 2020 Framework Programme [691011]
- Russian Science Foundation [17-12-01413]
- Russian Science Foundation [17-12-01413] Funding Source: Russian Science Foundation
We report how a doublet of the symmetric oppositely tilted bistable resonance peaks in a microring resonator with quadratic nonlinearity set for generation of the second harmonic can transform into a Kerr-like peak on one side of the linear cavity resonance and into a closed loop structure disconnected from the quasi-linear resonance on the other. Both types of the nonlinear resonances are associated with the formation of the soliton combs for dispersion profiles of a typical LiNbO3 microring. We report bright quasi-solitons propagating on a weakly modulated low intensity background when the group velocity dispersions have the opposite signs for the fundamental and second harmonic. We also show exponentially localized solitons when the dispersion signs are the same. Finally, we demonstrate that the transition between these two types of soliton states is associated with the closure of the forbidden gap in the spectrum of quasi-linear waves. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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