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Anomalous soliton trapping in net-normal dispersion lasers
Optics Letters
|May 23, 2023
Summary
This study reveals an anomalous vector soliton (VS) in fiber lasers, where components shift oppositely to traditional soliton trapping. This finding challenges existing understanding of VS dynamics in nonlinear optical systems.
Area of Science:
- Nonlinear Optics
- Fiber Lasers
- Soliton Dynamics
Background:
- Soliton trapping in birefringent systems relies on spectral shifts to counteract polarization-mode dispersion (PMD).
- Traditional vector solitons (VSs) exhibit specific spectral shifts for stable propagation in nonlinear optical systems.
Purpose of the Study:
- To demonstrate and analyze an anomalous vector soliton (VS) with reversed spectral shift behavior.
- To investigate the interplay of factors causing attraction and repulsion between VS components.
Main Methods:
- Numerical simulation of a nonlinear optical system with birefringence.
- Analysis of spectral shifts and component interactions within the laser cavity.
Main Results:
- An anomalous VS was observed where the fast component blueshifts and the slow component redshifts, opposite to conventional soliton trapping.
- Repulsion forces arise from net-normal dispersion and PMD.
- Attraction forces are attributed to linear mode coupling and saturable absorption.
Conclusions:
- The equilibrium between attractive and repulsive forces enables self-consistent VS evolution.
- The stability and dynamics of VSs warrant further investigation, particularly in complex laser configurations.
