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Symmetric and asymmetric optical multi-peak solitons on a continuous wave background in the femtosecond regime
- Source :
- Phys. Rev. E 94, 042221 (2016)
- Publication Year :
- 2016
-
Abstract
- We study symmetric and asymmetric optical multi-peak solitons on a continuous wave background in the femtosecond regime of a single-mode fiber. Key characteristics of such multi-peak solitons, as the formation mechanism, propagation stability, and shape-changing collisions, are revealed in detail. Our results show that this multi-peak (symmetric or asymmetric) mode could be regarded as a single pulse formed by a nonlinear superposition of a periodic wave and a single-peak (W-shaped or antidark) soliton. In particular, a phase diagram for different types of nonlinear excitations on a continuous wave background including breather, rogue wave, W-shaped soliton, antidark soliton, periodic wave, and multi-peak soliton is established based on the explicit link between exact nonlinear wave solution and modulation instability analysis. Numerical simulations are performed to confirm the propagation stability of the multi-peak solitons with symmetric and asymmetric structures. Further, we unveil a remarkable shape-changing feature of asymmetric multi-peak solitons. It is interesting that these shape-changing interactions occur not only in the intraspecific collision (soliton mutual collision) but also in the interspecific interaction (soliton-breather interaction). Our results demonstrate that each multi-peak soliton exhibits the coexistence of shape change and conservation of the localized energy of light pulse against the continuous wave background.<br />Comment: 9 pages, 8 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. E 94, 042221 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1603.04554
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevE.94.042221