Temporal soliton dynamics of synchronised ultrafast fibre lasers

Jiancheng Zheng, Diao Li*, Xiaoqi Cui, Peng Liu, Qiang Zhang, Zhiwei Zhu, Song Yang, Yusheng Zhang, Jiaxing Sun, Xianfeng Chen, Yang Haima, Esko Kauppinen, Zhipei Sun*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

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.
Original languageEnglish
Pages (from-to)32373-32382
JournalOptics Express
Volume31
Issue number20
DOIs
Publication statusPublished - 25 Sept 2023
MoE publication typeA1 Journal article-refereed

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