Optical soliton molecular complexes in a passively mode-locked fibre laser

Z. Q. Wang (), K. Nithyanandan, A. Coillet, P. Tchofo-Dinda and Ph. Grelu ()
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Z. Q. Wang: UMR 6303 CNRS, Université Bourgogne Franche-Comté
K. Nithyanandan: UMR 6303 CNRS, Université Bourgogne Franche-Comté
A. Coillet: UMR 6303 CNRS, Université Bourgogne Franche-Comté
P. Tchofo-Dinda: UMR 6303 CNRS, Université Bourgogne Franche-Comté
Ph. Grelu: UMR 6303 CNRS, Université Bourgogne Franche-Comté

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract Ultrashort optical pulses propagating in a dissipative nonlinear system can interact and bind stably, forming optical soliton molecules. Soliton molecules in ultrafast lasers are under intense research focus and present striking analogies with their matter molecules counterparts. The recent development of real-time spectral measurements allows probing the internal dynamics of an optical soliton molecule, mapping the dynamics of the pulses’ relative separations and phases that constitute the relevant internal degrees of freedom of the molecule. The soliton-pair molecule, which consists of two strongly bound optical solitons, has been the most studied multi-soliton structure. We here demonstrate that two soliton-pair molecules can bind subsequently to form a stable molecular complex and highlight the important differences between the intra-molecular and inter-molecular bonds. The dynamics of the experimentally observed soliton molecular complexes are discussed with the help of fitting models and numerical simulations, showing the universality of these multi-soliton optical patterns.

Date: 2019
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DOI: 10.1038/s41467-019-08755-4

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