可调反射器辅助的可重构微环光滤波器  

Reconfigurable optical filter based on microring resonator assisted by tunable Sagnac reflector

作　　者：刘宇航 林曈 李少波 于文琦 马向 梁晓东 恽斌峰 Liu Yu-Hang;Lin Tong;Li Shao-Bo;Yu Wen-Qi;Ma Xiang;Liang Xiao-Dong;Yun Bin-Feng(Advanced Photonics Center,School of Electronic Science&Engineering,Southeast University,Nanjing 210096,China;Optical Communication Research and Development Center,54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China)

机构地区：[1]东南大学电子科学与工程学院,先进光子学中心,南京210096 [2]中国电子科技集团公司第五十四研究所,光通信研发中心,石家庄050081

出　　处：《物理学报》2023年第8期185-195,共11页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:62105061,62171118,62075038);江苏省“双创计划”资助的课题.

摘　　要：为了适应光学滤波、微波信号处理等各种应用场景的需求,集成硅基光子滤波器需要具备多功能可重构和灵活可调谐特性.本文提出了一种可调反射器辅助的微环光滤波器芯片设计.通过传输矩阵模型,仿真结果表明,该器件可实现4种自由光谱范围的切换、100 dB消光比滤波、带通与带阻切换、Fano共振、类似电磁感应透明和类似电磁感应吸收等谱型的重构,且每种谱型均可以实现滤波中心频率的大范围调谐.本技术在集成光子模拟信号处理和微波光子学等领域具有广阔的应用前景.To meet the demands for various applications in optical filtering and microwave signal processing,integrated silicon photonic filters are required to be multifunctional,reconfigurable and tunable.In this work,an integrated multi-functional optical filter is proposed,which is designed based on a tunable Sagnac loop reflector and a microring resonator.The through port and drop port of an add-drop microring resonator are connected with the two ports of a tunable reflector.By controlling the thermal phase shifters in different scenarios,the device can be reconfigured into a reflective-type asymmetric Mach-Zehnder interferometer filter,a reflective-type all-pass microring resonator filter and self-interference microring resonator filters.An analytical model is established based on the transfer matrix.The simulation results show that the device can achieve the following functions:sinusoidal spectral filtering with four different free spectral ranges,Lorentzian spectral filtering toggling between band pass and band stop,and spectral reconfigurations of Fano resonance,electromagnetically induced transparency,and electromagnetically induced absorption.Each spectrum mentioned above can be tuned fast and widely.Reflection provides a new degree of freedom in design,breaks through the inherent footprint limit,and achieves a wide range of free spectral ranges.Our proposed tunable Sagnac loop reflector assisted microring resonator provides a new scheme for realizing flexible,tunable and multi-functional reconfigurable integrated photonic filters,and has broad applications in the integrated photonic analog signal processing and microwave photonics.

关 键 词：集成光学 可调反射器 微环谐振腔 可重构光学滤波器 

分 类 号：TN713[电子电信—电路与系统]