Internal polarization dynamics of vector dissipative-soliton-resonance pulses in normal dispersion fiber lasers

TL;DR

This paper explores the internal polarization behavior of vector dissipative-soliton-resonance pulses in mode-locked fiber lasers, revealing non-uniform polarization distribution across the soliton and confirming findings through experiments and simulations.

Contribution

It provides the first detailed experimental and numerical analysis of polarization dynamics within vector DSR pulses in fiber lasers.

Findings

Polarization varies across the soliton, with fixed polarization at the center and varying at the fronts.

Polarization distribution remains stable despite changes in gain conditions.

Experimental observations are validated by numerical simulations.

Abstract

Investigation of internal polarization dynamics of vector dissipative-soliton-resonance (DSR) pulses in a mode-locked fiber laser is presented. Stable vector DSR pulses are experimentally ob- served. Using a waveplate-analyzer configuration, we find that polarization is not uniform across a resonant dissipative soliton. Specifically, although the central plane wave of the resonant dissi- pative soliton acquires nearly a fixed polarization, the fronts feature polarization states that are different and spatially varying. This distinct polarizaiton distribution is maintained while the whole soliton structrue extends with varying gain conditions. Numerical simulation further confirms the experimental observations.