多芯光纤在增大光纤通信容量及制作光纤光子集成器件方面展现了独特的优势。最近，多芯光纤中光场多参量的调控技术已成为增大光纤通信容量的新的突破口之一。本项目旨在将空间结构光场引入到多芯光纤中，探讨多芯光纤的空间结构和耦合效应对复杂相位和偏振态分布光场产生的影响和调控规律，揭示空间结构光场与多芯结构相互作用的新效应和新现象，探索光场多参量调控的新方法和新手段。拟开展的主要研究有：①空间结构光场与多芯光纤的耦合效应；②多芯光纤中的光场角动量调控机理与实现方法；③金属填充的多芯光纤中光场与表面等离激元的耦合效应。拟解决的关键科学问题是：多芯光纤中量子态的激发与调控，光场多参量联合调控机理与实现方法。研究成果不仅为操控光传播行为和调控光量子态提供新的思路，还有助于超大容量通信光纤和新型光子集成器件的设计，为拓展空间结构光场研究范围并探索其新应用提供理论和实验基础。

Multi-core fibers (MCFs) exhibit unique advantages in increasing optical fiber communication capacity and making photonic integrated devices. Recently, multiple parameters modulation of light fields in MCFs has become a breakthrough to further increase the fiber communication capacity. In this project, we combined study the characteristics of spatially structured light fields in MCFs, discuss the evolution and control of light field with complex phase and polarization structures by the modulation of spatial structure, reveal new effects and new phenomena during the interaction of MCFs and light fields, and further explore new methods to modulate multiple parameters of light fields. The main contents of this project are as followed: ① The coupling effect between the light fields and MCFs; ② The modulation mechanisms and realization methods of angular momentum in fibers are explored; ③ The coupling effects between light fields and surface plasmon polariton (SPP) in metal filled MCFs. The key scientific problems to be solved are: stimulating and controlling photon states in MCFs, modulation mechanisms and implementation methods for multiple parameters of light fields in MCFs. Our research results not only provide new ideas for manipulating light propagation behavior and controlling photon states, but also help the ultra-large capacity optical fiber and the new photonic integrated device design, and provide theoretical and experimental foundation for expand the research of spatially structured light fields and explore its new applications.