受迫半导体激光器中碰撞引起的极端事件
Extreme events induced by collisions in a forced semiconductor laser
摘要：
报道了腔长为1~m的光驱动多模半导体激光器的实验研究。我们观察到的时空制度，实时测量显示非常高的强度峰值的激光场。这种制度，它与锁定状态和稳定的相位孤子共存，其特征在于出现极端事件，产生一个重尾统计的概率密度函数。我们解释的极端事件与相反的手征时空结构的碰撞。对半导体激光器模型的数值模拟显示了非常相似的动力学行为，证实了我们的证据，并证实了相位孤子与具有不同相位旋转的瞬态结构之间的碰撞等相互作用的描述。
英文摘要：
We report on the experimental study of an optically driven multimode semiconductor laser with 1~m cavity length. We observed a spatiotemporal regime where real time measurements reveal very high intensity peaks in the laser field. Such a regime, which coexists with the locked state and with stable phase solitons, is characterized by the emergence of extreme events which produce a heavy tail statistics in the probability density function. We interpret the extreme events as collisions of spatiotemporal structures with opposite chirality. Numerical simulations of the semiconductor laser model, showing very similar dynamical behavior, substantiate our evidences and corroborate the description of such interactions as collisions between phase solitons and transient structures with different phase rotations.
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