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首页> 外文期刊>Nature photonics >Self-organized instability in graded-index multimode fibres
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Self-organized instability in graded-index multimode fibres

机译：分级索引多模纤维中的自组织不稳定

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Multimode fibres (MMFs) are attracting interest in the study of spatiotemporal dynamics as well as in the context of ultrafast fibre sources, imaging and telecommunications. This interest stems from three differences compared with single-mode fibre structures: their spatiotemporal complexity (information capacity), the role of disorder, and their complex intermodal interactions. To date, MMFs have been studied in limiting cases in which one or more of these properties can be neglected. Here, we study a regime in which all these elements are integral. We observe a spatial beam-cleaning phenomenon that precedes spatiotemporal modulation instability. We provide evidence that the origin of these processes is a universal unstable attractor in graded-index MMFs. The self-organization and instability of the attractor are both caused by intermodal interactions characterized by cooperating disorder, nonlinearity and dissipation. Disorder-enhanced nonlinear processes in MMFs have important implications for future telecommunications, and the multifaceted nature of the considered dynamics showcases MMFs as potential laboratories for a variety of topics in complexity science.
机译：多模纤维（MMFS）吸引了对时尚动力学研究的兴趣以及超快纤维来源，成像和电信的背景下。与单模纤维结构相比，这种兴趣源于三种差异：它们的时空复杂性（信息能力），疾病的作用及其复杂的多语互动。迄今为止，已经在限制了其中一个或多个可以忽略的情况下进行了MMF。在这里，我们研究了所有这些元素是整数的制度。我们观察到时空调制不稳定性之前的空间束清洁现象。我们提供了证据表明这些过程的起源是分级索引MMF中的通用不稳定吸引子。吸引子的自组织和不稳定性都是由多语交织引起的，其特征是通过协作疾病，非线性和耗散的特征。 MMFS中的混乱增强的非线性过程对未来电信具有重要意义，并且考虑动态的多方面性质展示了MMFS作为复杂性科学各种主题的潜在实验室。

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