基于聚合物-石英复合光纤结构的轨道角动量产生和传输的研究

项目名称： 基于聚合物-石英复合光纤结构的轨道角动量产生和传输的研究

项目编号： No.61505176

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 邱薇薇

作者单位： 浙江科技学院

项目金额： 21万元

中文摘要： 光轨道角动量（OAM）复用技术可以使得光纤通信容量大幅度提高，而发展OAM复用技术的根本问题在于如何有效的产生光OAM模式的产生以及如何保持光OAM模式的稳定传输。根据光纤中传输模式的总角动量，自旋角动量（SAM）和OAM之间的关系，通过研究光纤中圆偏振模式的产生和保持来获取OAM的传输特性。结合石英光纤与现有光纤通信网络兼容和聚合物材料多功能性的优势，提出基于石英-聚合物复合的螺旋光纤结构的实现OAM产生，转换和传输多种功能一体化。建立复合的螺旋光纤结构分析模型，系统研究光纤中OAM的特性。在此基础上，研究模式间的耦合机制，实现高纯度的高阶OAM产生；提出多个OAM模式在同一光纤信道中传输的方案，探讨能有效抑制模间串扰的优化设计原则。最后，对以上设计方案进行实验验证，最终为OAM模式复用提供技术支持。

中文关键词： 轨道角动量；圆偏振；模式复用；聚合物光纤

英文摘要： Orbital angular momentum (OAM) based multiplexing can make a substantial increase of optical fiber communication capacity, but the key problem is the generation and the propagation of OAM. In fibers, OAM and SAM (Spin angular momentum) of an individual mode are dependent, and the total angular is determined by the angular order of the mode, which means that once the SAM is determined and maintained, the corresponding OAM will be generated and maintained. As silica fiber has high compatibility with existing optical fiber communication network, and multifunction of polymeric materials, a scheme of fiber based on quartz-polymer composited with spiral structure is proposed. In this composited fiber, the generation, conversion and propagation of OAM can be achieved. First we try to develop theoretical model for the composite fiber and investigate its transmission principle of OAM modes. Then we will investigate the mechanism of coupling between different fiber modes to achieve the generation of higher order OAM modes. Meanwhile, we focus on the generation of multiple OAM modes, optimization the scheme to suppress the inter-mode crosstalk. Further, the results will be theoretically analyzed and experimentally verified and ultimately to provide technical support for OAM mode multiplexing.

英文关键词： Orbital Angular Momentum;Circular polarization;Mode Division Multiplexing;polymer fiber