Affiliation:
1. Institute of Semiconductors
2. University of Chinese Academy of Sciences
3. Beijing Engineering Technology Research Center of All-Solid-State Lasers Advanced Manufacturing
4. The Chinese University of Hong Kong
5. Technical University of Denmark
Abstract
Pure-quartic solitons (PQSs) have recently received increasing attention due to their energy-width scaling over the traditional soliton, which has expanded our understanding of soliton dynamics with high-order dispersion in nonlinear systems. Here, we numerically reveal the asynchronization and synchronization processes of the sub-pulse within the vector PQS molecule in a mode-locked fiber laser by solving the coupled Ginzburg-Landau equations. During the establishment of a vector PQS molecule, the repulsion, attraction, and finally stabilization processes have been observed. Specifically, sub-pulse disappearance, regeneration, and finally synchronization with the other pulses are also investigated. Our analysis of the pulse energy, time interval, and relative phase evolution dynamics with the round trip indicates that the asynchronization and synchronization within the vector PQS molecule associate tightly with the gain competition and the cross-phase modulation. Our findings provide insights into the internal mutual dynamics within the vector soliton molecule and offer guidance for the applications of PQS.
Funder
National Natural Science Foundation of China
Innovation Fund Demark
Villum Fonden
CAS Project for Young Scientists in Basic Research
Cited by
4 articles.
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