Accelerated nonlinear interactions in graded-index multimode fibers
Accelerated nonlinear interactions in graded-index multimode fibers
复制标题
DOI：
10.1038/s41467-019-09687-9
复制
发表时间：
2019-04-09
影响因子：
16.6
通讯作者：
Christodoulides, D. N.
中科院分区：
文献类型：
--
作者：
Eftekhar, M. A.;Sanjabi-Eznaveh, Z.;Christodoulides, D. N.
多模光纤最近作为一种可行的平台重新出现，用于解决与信息带宽需求和功率处理能力相关的许多长期存在的问题。最近的研究表明，可以有效地利用这种重多模态系统的复杂性来观察由时空和多模态线性和非线性过程引起的全新物理效应。本文首次研究了减小芯径的多模光纤中的加速非线性多模相互作用。我们证明，在异常色散区域，这种时空加速会导致相对蓝移的多模孤子和蓝漂移的色散波梳，而在正常区域，会导致一个非常平坦和均匀的超连续体，延伸超过2.5个八度。我们的研究结果为更深入地理解非线性、重多模光学系统的物理和复杂性铺平了道路，并可能导致具有非常高光谱密度的高度可调谐光源。
Multimode optical fibers have recently reemerged as a viable platform for addressing a number of long-standing issues associated with information bandwidth requirements and power-handling capabilities. As shown in recent studies, the complex nature of such heavily multimoded systems can be effectively exploited to observe altogether novel physical effects arising from spatiotemporal and intermodal linear and nonlinear processes. Here, we study for the first time, accelerated nonlinear intermodal interactions in core-diameter decreasing multimode fibers. We demonstrate that in the anomalous dispersion region, this spatiotemporal acceleration can lead to relatively blue-shifted multimode solitons and blue-drifting dispersive wave combs, while in the normal domain, to a notably flat and uniform supercontinuum, extending over 2.5 octaves. Our results pave the way towards a deeper understanding of the physics and complexity of nonlinear, heavily multimoded optical systems, and could lead to highly tunable optical sources with very high spectral densities.