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

Yiyang Luo,Luming Zhao,Qizhen Sun,Deming Liu,Zhichao Wu,Lei Li,Songnian Fu,Dingyuan Tang,Zhilin Xu

doi:10.1364/oe.24.018718

Abstract

Vectorial nature of dissipative solitons (DSs) with high repetition rate 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 spectrum, which can be considered as an auxiliary indicator of the group velocity locked vector DSs. Moreover, numerical simulations well confirm the experimental observations and further reveal the impact of the net cavity birefringence on the properties of the formed vector DSs.

Highlights

Dissipative solitons (DSs) in passively mode-locked fiber lasers have been a topic of intensive research as a fundamental extension of conservative solitons [1,2,3]
We report on an experimental observation of the 129.3 MHz fundamental mode-locked and the 258.6 MHz 2nd-order harmonic mode-locked group velocity locked vector dissipative solitons (GVLVDSs) in a dispersion-managed short-cavity fiber laser with net normal dispersion
Assisted with polarization resolved measurement, we can get insight into the vectorial nature of these DSs, including the characteristics of the two orthogonally polarized components, as well as the polarization locked and polarization rotating GVLVDSs respectively observed under fundamental mode-locking and harmonic mode-locking of the fiber laser

Summary

Introduction

Dissipative solitons (DSs) in passively mode-locked fiber lasers have been a topic of intensive research as a fundamental extension of conservative solitons [1,2,3]. It is desirable to explore whether similar features of VDSs could be maintained in a normal-dispersion short-cavity fiber laser with a high repetition rate, which is significant to both fundamental scientific research and industrial applications of ultra-high-capacity optical communications.

Results

Conclusion