Collapse on the line – how synthetic dimensions influence nonlinear effects
Collapse on the line – how synthetic dimensions influence nonlinear effects
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DOI：
10.1038/s41598-019-46060-8
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发表时间：
2019-05
影响因子：
4.6
通讯作者：
A. Muniz;M. Wimmer;A. Bisianov;R. Morandotti;U. Peschel
中科院分区：
文献类型：
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作者：
A. Muniz;M. Wimmer;A. Bisianov;R. Morandotti;U. Peschel
功率诱导波坍缩是光学中最迷人的现象之一，因为它提供极高的强度，从而激发一系列非线性过程。对于低功率水平，光束在体相介质中的传播主要是由衍射，而在一定的阈值以上的自聚焦是稳步增强的行动的一个积极的非线性。自催化爆破发生，这是唯一停止的饱和的非线性，材料损伤或固有的介质离散性。在后一种情况下，这导致能量定位在单个位点上。人们普遍认为，对于立方非线性，这种有趣的效应需要至少两个横向尺寸才能发生，因此在光纤中无法实现。根据合成维度的概念，我们证明了混合短程和长程相互作用类似于二维网格晶格，并且在耦合纤维环形成的真正的1D系统中具有mW功率水平的波塌缩。
Power induced wave collapse is one of the most fascinating phenomena in optics as it provides extremely high intensities, thus stimulating a range of nonlinear processes. For low power levels, propagation of beams in bulk media is dominated by diffraction, while above a certain threshold self-focusing is steadily enhanced by the action of a positive nonlinearity. An autocatalytic blow-up occurs, which is only stopped by saturation of the nonlinearity, material damage or the inherent medium discreteness. In the latter case, this leads to energy localization on a single site. It is commonly believed that for cubic nonlinearities, this intriguing effect requires at least two transverse dimensions to occur and is thus out of reach in fiber optics. Following the concept of synthetic dimensions, we demonstrate that mixing short and long-range interaction resembles a two-dimensional mesh lattice and features wave collapse at mW-power levels in a genuine 1D system formed by coupled fiber loops.