Dissipative pure-quartic soliton fiber laser

The evolution of ultrafast laser technology hinges partially on the understanding of the soliton nonlinear dynamics. Recently, the concept of pure-quartic soliton (PQS) that arises from the balance of pure negative fourth-order dispersion (FOD) and nonlinearity was proposed to generate high peak power pulse. Herein, we investigate the generation of dissipative pure-quartic soliton (DPQS) in a fiber laser, which is balanced among the positive FOD, nonlinearity, gain and loss. The DPQS features the shape-preserving propagation despite the asymmetrical temporal profile at higher pulse energy. It is found that the asymmetrical temporal profile of DPQS is resulted from the mismatching of the phase shift profiles caused by self-phase modulation and FOD. Moreover, it is demonstrated that the DPQS possesses a higher energy-scaling ability compared to conventional dissipative soliton, owing to the nonlinear relationship between the pulse energy and pulse duration. These findings demonstrated that the employment of positive FOD could be a promising way for manipulation of optical pulse as well as the improvement of laser performance. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

In this study, the characteristics of dissipative pure-quartic soliton (DPQS) generation in a fiber laser were investigated. The experimental results demonstrate that DPQS features shape-preserving propagation with an asymmetrical temporal profile. The asymmetrical temporal profile of DPQS is caused by the mismatching of phase shift profiles resulting from self-phase modulation and fourth-order dispersion. Compared to conventional dissipative solitons, DPQS exhibits a higher energy-scaling ability.