近日，华中科技大学的赵鹭明及其研究小组与温州大学的朱海永等人合作并取得一项新进展。经过不懈努力，他们揭示光纤激光器中矢量孤子的倍周期分岔和偏振动力学。相关研究成果已于2024年11月7日在国际知名学术期刊《物理评论A》上发表。

该研究团队在含有可饱和吸收体的锁模光纤激光器中，数值观察到了两种矢量孤子的周期倍增现象：一种是两个正交极化分量的异步周期倍增，另一种是在不同操作条件下的同步周期倍增。异步周期倍增的矢量孤子在光谱上演化时，表现为光谱中出现额外的边带，且极化状态锁定为腔长的整数倍。

相比之下，同步周期倍增的矢量孤子演化更为缓慢，其极化锁定在大约-π/2的位置，表明为圆极化。此外，通过孤子蒸馏法可以去除连续波背景和边带，从而揭示出纯矢量孤子异步和同步周期倍增的动力学特性。

附：英文原文

Title: Period-doubling bifurcation and polarization dynamics of vector solitons in a fiber laser

Author: Hengwen Lan, Fanglin Chen, Andrey Komarov, Konstantin Komarov, Xiahui Tang, Ming Tang, Haiyong Zhu, Luming Zhao

Issue&Volume: 2024/11/07

Abstract: In a mode-locked fiber laser with a saturable absorber, two types of period doubling of vector solitons are numerically observed: One is the asynchronous period doubling of two orthogonal polarization components, and the other is a synchronous one under different operation conditions. The spectral evolution of the asynchronous period doubling of vector solitons is characterized by the appearance of additional sidebands in the spectrum, with the polarization state locked to multiples of the cavity length. In contrast, the synchronous period doubling of vector solitons evolves more slowly, with their polarization locked at approximately -π/2, indicating circular polarization. Additionally, using the soliton distillation method removes the continuous-wave background and sidebands, revealing the dynamics of asynchronous and synchronous period doubling of pure vector solitons.

DOI: 10.1103/PhysRevA.110.053505

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.053505