双向超快铥光纤激光器中的相干和非相干呼吸孤子

IF 3.7 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Photonics Research Pub Date : 2024-06-02 DOI:10.1002/adpr.202400049
Yi Zhou, Jiqiang Kang, Kenneth K. Y. Wong
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引用次数: 0

摘要

模式锁定激光器容易表现出多种动态,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串。本文提出将耗散呼吸孤子的概念扩展到非相干局部形成,并通过实验报告了在 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。实验提供了不同相干性呼吸孤子动态的实时光谱特征,突出了自组织的显著特点。实验还证明了相干呼吸孤子和噪声脉冲之间的切换,这与多重瞬态退相干和相干恢复相对应。由于共同的增益和损耗调制,双向孤子演化的行为具有高度相似性。使用离散激光模型进行的数值模拟验证了实验结果。这项研究推广了之前在相干情况下观察到的呼吸孤子,为在各种耗散系统中产生呼吸开辟了新的可能性。
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Coherent and Incoherent Breathing Solitons in a Bidirectional Ultrafast Thulium Fiber Laser

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.

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