Coherent and Incoherent Breathing Solitons in a Bidirectional Ultrafast Thulium Fiber Laser
Coherent and Incoherent Breathing Solitons in a Bidirectional Ultrafast Thulium Fiber Laser
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DOI：
10.1002/adpr.202400049
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发表时间：
2024-06-02
期刊：
影响因子：
--
通讯作者：
Wong，Kenneth K. Y.
中科院分区：
文献类型：
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作者：
Zhou，Yi;Kang，Jiqiang;Wong，Kenneth K. Y.
锁模激光器容易表现出广泛的动力学，包括具有高鲁棒性的相干耗散孤子或可能发射的非相干脉冲群。本文提出将耗散呼吸孤子的概念扩展到非相干局域形成，并通过报道2 μm双向超快光纤激光器中产生的原始相干和非相干呼吸孤子的实验结果说明了这一点。一个真实的时间谱表征呼吸孤子动力学与不同的相干性，突出了自组织的显着特点。实验还证明了相干呼吸孤子和类噪声脉冲之间的切换，对应于多次瞬态退相干和相干恢复。由于共同的增益调制和损耗调制，双向孤子演化具有很高的相似性。使用离散激光模型的数值模拟验证了实验结果。这项研究概括了以前的观察呼吸孤子的相干情况下，开辟了新的可能性，在各种耗散系统中产生呼吸。
Mode‐locked lasers are prone to exhibit a wide range of dynamics, including the coherent dissipative soliton with high robustness or the possible emission of incoherent pulse bursts. Herein, it is proposed to expand the notion of dissipative breathing solitons to incoherent localized formation, which is illustrated experimentally by reporting original coherent and incoherent breathing solitons generated in a 2 μm bidirectional ultrafast fiber laser. A real‐time spectral characterization of the breathing soliton dynamics with different coherence is provided, highlighting salient features of the self‐organization. The switching between coherent breathing soliton and noise‐like pulse is also experimentally demonstrated, corresponding to the multiple transient decoherence and coherence recovery. High behavior similarity exists in bidirectional solitons evolution owing to the common gain and loss modulation. Numerical simulations using a discrete laser model validate the experimental findings. This research generalizes previous observations of breathing solitons made in the coherent case and opens up new possibilities for generating breathers in various dissipative systems.