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arXiv 2112.07136physics.opticsnlin.PS
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锁模激光器中孤子对的动力学跃迁

Soliton-pair dynamical transition in mode-locked lasers

Kfir Sulimany, Offek Tziperman, Yaron Bromberg, Omri Gat

摘要:

多孤子锁模激光波形作为一种复杂的光源在研究和应用中备受关注,但由于存在复杂多样的相互作用,难以有效地操纵。在这里,我们提出了一个实验,数值和理论研究的相互作用和控制的内部动力学的两个孤子波形在锁模光纤激光器。使用泵浦电流作为控制剂,我们实验证明了一个两个数量级的减少在分离的绑定孤子对,诱导之间的动态过渡松散的绑定,相位不相干的对,和紧密绑定的相位锁定对。我们表明,最近提出的噪声介导的相互作用理论的Haus模型数值模拟的基础上,脉冲分离和动态过渡的色散波的形状。我们解释的动力学过渡分析显示,在一个简化的理论,噪音介导的相互作用成为纯粹的吸引力时,能量下降到阈值以下。这项工作证明了通过相互作用力控制波形的能力,而无需外部干预激光器中的光传播。

英文摘要:

Multi-soliton mode-locked laser waveforms are much sought as a complex light source for research and applications, but are difficult to manipulate effectively because of the elaborate and diverse interactions present. Here we present an experimental, numerical, and theoretical study of the interaction and control of the internal dynamics of a two-soliton waveform in a mode-locked fiber laser. Using the pumping current as a control agent, we demonstrate experimentally a two-orders-of-magnitude reduction in the separation of a bound soliton pair, inducing a dynamical transition between a loosely bound, phase-incoherent pair, and a tightly bound phase-locked pair. We show on the basis of a Haus-model numerical simulation of the recently-proposed noise-mediated interaction theory, that the pulse separation and dynamical transition are governed by the shape of the dispersive-wave pedestals. We explain the dynamical transition by showing analytically, within a simplified theory, that the noise-mediated interaction becomes purely attractive when the pedestals energy drops below a threshold. This work demonstrates the ability to control the waveform through the interaction forces, without external intervention in the light propagation in the laser.

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