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

Area of Science:

• Nonlinear optics
• Ultrafast laser physics
• Complex systems

Background:

• Optical soliton molecules, formed by bound ultrashort pulses in dissipative nonlinear systems, are analogous to matter molecules.
• Soliton-pair molecules, composed of two bound solitons, are the most studied multi-soliton structures.
• Real-time spectral measurements enable probing the internal dynamics of optical soliton molecules.

Purpose of the Study:

• To demonstrate the formation of stable molecular complexes from two soliton-pair molecules.
• To investigate the differences between intra-molecular and inter-molecular bonds in these complexes.
• To analyze the dynamics of these complexes and show the universality of multi-soliton patterns.

Main Methods:

• Experimental observation of soliton molecular complexes.
• Real-time spectral measurements to probe internal dynamics.
• Fitting models and numerical simulations for analysis.

Main Results:

• Two soliton-pair molecules can bind to form a stable molecular complex.
• Distinct differences exist between intra-molecular and inter-molecular bonds.
• Experimental dynamics align with theoretical models, indicating pattern universality.

Conclusions:

• Stable molecular complexes can be formed from multiple soliton-pair molecules.
• The study highlights the complex bonding dynamics within multi-soliton structures.
• Observed dynamics support the universality of multi-soliton optical patterns in dissipative systems.