Zheng Jiancheng, Li Diao, Cui Xiaoqi, Liu Peng, Zhang Qiang, Zhu Zhiwei, Yang Song, Zhang Yusheng, Sun Jiaxing, Chen Xianfeng, Yang Haima, Kauppinen Esko I, Sun Zhipei
Opt Express. 2023 Sep 25;31(20):32373-32382. doi: 10.1364/OE.492450.
Synchronised ultrafast soliton lasers have attracted great research interest in recent decades. However, there is a lack of comprehensive understanding regarding the buildup mechanism of synchronised pulses. Here, we report a dynamic analysis of independent and synchronised solitons buildup mechanisms in synchronised ultrafast soliton lasers. The laser comprises an erbium-doped fibre cavity and a thulium-doped fibre cavity bridged with a common arm. Pulses operating at two different wavelengths formed in the cavities are synchronised by cross-phase modulation-induced soliton correlation in the common fibre arm. We find that the whole buildup process of the thulium-doped fibre laser successively undergoes five different stages: continuous wave, relaxation oscillation, quasi-mode-locking, continuous wave mode-locking and synchronised mode-locking. It is found that the starting time of the synchronised solitons is mainly determined by the meeting time of dual-color solitons. Our results will further deepen the understanding of dual-color synchronised lasers and enrich the study of complex nonlinear system dynamics.
近几十年来，同步超快孤子激光器引起了极大的研究兴趣。然而，对于同步脉冲的建立机制仍缺乏全面的理解。在此，我们报告了同步超快孤子激光器中独立孤子和同步孤子建立机制的动态分析。该激光器包括一个掺铒光纤腔和一个通过公共臂桥接的掺铥光纤腔。在腔内形成的两个不同波长的脉冲通过公共光纤臂中交叉相位调制诱导的孤子相关性实现同步。我们发现掺铥光纤激光器的整个建立过程依次经历五个不同阶段：连续波、弛豫振荡、准锁模、连续波锁模和同步锁模。研究发现，同步孤子的起始时间主要由双色孤子的相遇时间决定。我们的结果将进一步加深对双色同步激光器的理解，并丰富复杂非线性系统动力学的研究。
