Group velocity locked vector dissipative solitons in a high repetition rate fiber laser

TL;DR

This paper demonstrates the first experimental observation of polarization locked and rotating vector dissipative solitons in a high repetition rate normal-dispersion fiber laser, revealing their unique spectral and velocity characteristics.

Contribution

It introduces the first study of vector dissipative solitons in high repetition rate fiber lasers, showing their polarization locking and group velocity locking behaviors.

Findings

Polarization locked vector DSs at 129.3 MHz

Polarization rotating vector DSs at 258.6 MHz

Distinct central wavelengths for orthogonal components

Abstract

Vectorial nature of dissipative solitons (DSs) with high repetition rates is studied for the first time in a normal-dispersion fiber laser. Despite the fact that the formed DSs are strongly chirped and the repetition rate is greater than 100 MHz, polarization locked and polarization rotating group velocity locked vector DSs can be formed under 129.3 MHz fundamental mode-locking and 258.6 MHz harmonic mode-locking of the fiber laser, respectively. The two orthogonally polarized components of these vector DSs possess distinctly different central wavelengths and travel together at the same group velocity in the laser cavity, resulting in a gradual spectral edge and small steps on the optical spectra, which can be considered as an auxiliary indicator of the group velocity locked vector DSs.