Details
| Original language | English |
|---|---|
| Article number | 013003 |
| Journal | New journal of physics |
| Volume | 25 |
| Issue number | 1 |
| Publication status | Published - Jan 2023 |
Abstract
Nonlinear waveguides with two distinct domains of anomalous dispersion can support the formation of molecule-like two-color pulse compounds. They consist of two tightly bound subpulses with frequency loci separated by a vast frequency gap. Perturbing such a two-color pulse compound triggers periodic amplitude and width variations, reminiscent of molecular vibrations. With increasing strength of perturbation, the dynamics of the pulse compound changes from harmonic to nonlinear oscillations. The periodic amplitude variations enable coupling of the pulse compound to dispersive waves, resulting in the resonant emission of multi-frequency radiation. We demonstrate that the location of the resonances can be precisely predicted by phase-matching conditions. If the pulse compound consists of a pair of identical subpulses, inherent symmetries lead to degeneracies in the resonance spectrum. Weak perturbations lift existing degeneracies and cause a splitting of the resonance lines into multiple lines. Strong perturbations result in more complex emission spectra, characterized by well separated spectral bands caused by resonant Cherenkov radiation and additional four-wave mixing processes.
Keywords
- nonlinear optics, nonlinear Schrödinger equation, optical solitons, resonant radiation, soliton molecules
ASJC Scopus subject areas
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In: New journal of physics, Vol. 25, No. 1, 013003, 01.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Resonant Kushi-comb-like multi-frequency radiation of oscillating two-color soliton molecules
AU - Melchert, O.
AU - Willms, S.
AU - Oreshnikov, I.
AU - Yulin, A.
AU - Morgner, U.
AU - Babushkin, I.
AU - Demircan, A.
N1 - Funding Information: OM, SW, IB, UM, and AD acknowledge financial support from Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering–Innovation Across Disciplines) (EXC 2122, Project No. 390833453). AY acknowledges financial support from Priority 2030 Academic Leadership Program and Goszadanie No. 2019-1246. IB also acknowledges support from DFG (Project No. BA4156/4-2). UM also acknowledges support from DFG (Project No. MO 850-20/1).
PY - 2023/1
Y1 - 2023/1
N2 - Nonlinear waveguides with two distinct domains of anomalous dispersion can support the formation of molecule-like two-color pulse compounds. They consist of two tightly bound subpulses with frequency loci separated by a vast frequency gap. Perturbing such a two-color pulse compound triggers periodic amplitude and width variations, reminiscent of molecular vibrations. With increasing strength of perturbation, the dynamics of the pulse compound changes from harmonic to nonlinear oscillations. The periodic amplitude variations enable coupling of the pulse compound to dispersive waves, resulting in the resonant emission of multi-frequency radiation. We demonstrate that the location of the resonances can be precisely predicted by phase-matching conditions. If the pulse compound consists of a pair of identical subpulses, inherent symmetries lead to degeneracies in the resonance spectrum. Weak perturbations lift existing degeneracies and cause a splitting of the resonance lines into multiple lines. Strong perturbations result in more complex emission spectra, characterized by well separated spectral bands caused by resonant Cherenkov radiation and additional four-wave mixing processes.
AB - Nonlinear waveguides with two distinct domains of anomalous dispersion can support the formation of molecule-like two-color pulse compounds. They consist of two tightly bound subpulses with frequency loci separated by a vast frequency gap. Perturbing such a two-color pulse compound triggers periodic amplitude and width variations, reminiscent of molecular vibrations. With increasing strength of perturbation, the dynamics of the pulse compound changes from harmonic to nonlinear oscillations. The periodic amplitude variations enable coupling of the pulse compound to dispersive waves, resulting in the resonant emission of multi-frequency radiation. We demonstrate that the location of the resonances can be precisely predicted by phase-matching conditions. If the pulse compound consists of a pair of identical subpulses, inherent symmetries lead to degeneracies in the resonance spectrum. Weak perturbations lift existing degeneracies and cause a splitting of the resonance lines into multiple lines. Strong perturbations result in more complex emission spectra, characterized by well separated spectral bands caused by resonant Cherenkov radiation and additional four-wave mixing processes.
KW - nonlinear optics
KW - nonlinear Schrödinger equation
KW - optical solitons
KW - resonant radiation
KW - soliton molecules
UR - http://www.scopus.com/inward/record.url?scp=85146425364&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/acadff
DO - 10.1088/1367-2630/acadff
M3 - Article
AN - SCOPUS:85146425364
VL - 25
JO - New journal of physics
JF - New journal of physics
SN - 1367-2630
IS - 1
M1 - 013003
ER -