摘要
针对光纤中多个模式的选择性激发问题,提出利用介质超表面实现光纤多模的频率选择性激发方案.将超表面结构分为四个象限区,对前三象限超表面结构采用便利搜索法设计,对第四象限结构采用深度学习方法进行反向设计,实现了频率控制两个模式的模分复用.该方案为实现光纤多模复用提供了一种新的思路,且选择性激发的模式个数具有可拓展性;在通信领域具有潜在的应用前景.
How to realize the selective excitations of different optical modes in fibers is a key problem in mode division multiplexing.Here,a silicon metasurface is designed for realizing the multi-mode selective excitation at different frequencies.The metasurface is divided into four quadrants.We design the first three quadrants with the traversal searching method,and the fourth quadrant with deep learning.Consequently,two fiber modes are locked at different frequencies,and selectively excited.This proposal provides a new approach for selective excitation of fiber modes,and it can be extended to more modes.It shows promising applications in optic communications.
作者
冯磊
张杰
武霖
钱超
陈红胜
高飞
FENG Lei;ZHANG Jie;WU Lin;QIAN Chao;CHEN Hongsheng;GAO Fei(Zhejiang University,Hangzhou 310007,China;Westlake University,Hangzhou 310024,China)
出处
《电波科学学报》
CSCD
北大核心
2021年第6期953-957,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(61801426,11961141010)
中央高校基本科研业务费(2020XZZX002-15)。
关键词
电磁超表面
模分复用
反向设计
深度学习
光纤通信
electromagnetic metasurface
mode multiplexing
inverse design
deep learning
optical fiber communication