基于超透镜的多芯泵浦耦合器  

Multi-Core Fiber Pump Coupler Based on Metalens

作　　者：李波瑶 汪幸杰 孙敬华 谢仲业 陈晓涌 LI Bo-yao;WANG Xing-jie;SUN Jing-hua;XIE Zhong-ye;CHEN Xiao-yong(School of Electronic and Intelligentization,Dongguan University of Technology,Dongguan 523808,China)

机构地区：[1]东莞理工学院电子工程与智能化学院,广东东莞523808

出　　处：《光学与光电技术》2022年第4期79-82,共4页Optics & Optoelectronic Technology

基　　金：广东省基础与应用基础研究基金区域联合基金重点项目(2020B1515120041);广东省普通高校省级重大科研项目(2018KZDXM067)资助。

摘　　要：多芯传输系统有望解决未来大容量数据传输的问题。然而在整个通信系统中多芯信号的中继目前面临着许多困难,例如信道增益的不均衡、多芯泵浦光的分束耦合等。其中泵浦光和增益多芯光纤纤芯间的均匀耦合由于决定着多芯光纤增益的效率和对应纤芯增益的均衡和系统能效的利用率,成为多芯系统放大的关键问题之一。基于此,设计了一种基于光纤端面的超透镜耦合装置,通过适当优化超透镜子结构的分布,最终可以使得泵浦光可以多点聚焦到耦合多芯光纤的焦平面。相比于空间光耦合光纤系统,减少泵浦光的浪费。理论设计和数值仿真结果表明光纤包层中的光可以在光纤端面分点聚焦,从而使得泵浦光的分流和纤芯聚焦,总的光强利用率达90%以上,为后续有源光纤实现芯泵提供解决思路。Multi-core transmission system is expected to solve the problem of high-capacity data transmission in the future.However,in the whole communication system,the relay of multi-core signal faces many difficulties,such as the imbalance of channel gain,the beam splitting coupling of multi-core pump light and so on.The uniform coupling between pump light and gain multi-core fiber core determines the efficiency of multi-core fiber gain,the balance of corresponding core gain and the utilization of system energy efficiency,which has become one of the key problems of multi-core system amplification.Based on this,this paper designs a metalens coupling device based on the end face of the optical fiber.By properly optimizing the distribution of the metalens structure,the pump light can focus on the focal plane of the coupled multi-core optical fiber.Compared with the space optical coupling optical fiber system,the waste of pump light is reduced.The theoretical design and numerical simulation results show that the light in the optical fiber cladding can be focused on the end face of the optical fiber,so that the pump light can be shunted and focused on the core,and the total light intensity utilization rate is more than 90%,which provides a solution for the subsequent active optical fiber to realize the core pump.

关 键 词：超透镜 多芯光纤 光纤器件 空分复用 超材料 

分 类 号：TN253[电子电信—物理电子学]