基于模式分裂现象的在纤式双微盘谐振腔  

In-Fiber Double Microdisk Resonator Based on Mode Splitting

作　　者：林春婷 吴根柱[1,2] 汪成程 卢俊城 Lin Chunting;Wu Genzhu;Wang Chengcheng;Lu Juncheng(Institute of Optical Information,Zhejiang Normal University,Zhejiang 321004,China;Xingzhi College,Zhejiang Normal University,Zhejiang 321004,China)

机构地区：[1]浙江师范大学光学信息研究所,浙江金华321004 [2]浙江师范大学行知学院,浙江金华321004

出　　处：《光学学报》2021年第4期70-75,共6页Acta Optica Sinica

基　　金：浙江省自然科学基金(LY19F050015,LY19F050014)。

摘　　要：为了实现结构紧凑、性能稳定的回音壁微腔,提出一种在纤式并联双微盘结构,其中回音壁微腔与激发回音壁模式的光波导均处于光纤纤芯中。采用有限时域差分法研究模式分裂现象中对称模式与反对称模式随着两微盘耦合间距增大的变化规律。研究结果表明,对称模式与反对称模式之间存在竞争关系,随着耦合间距的增大,反对称模式的透射率先变大后变小,共振波长发生红移;对称模式则正好相反。通过计算分析制作工艺精度对模式分裂的影响。该研究结果可用于高灵敏度在纤式微盘光纤温度传感器的设计等领域。In order to realize the whispering gallery microcavity with compact structure and stable performance,this paper proposes an in-fiber parallel dual microdisk structure,in which the whispering gallery microcavity and the optical waveguide that excites the whispering gallery mode are both in the fiber core.Finite time domain difference method is used to study the variations of the symmetric mode and antisymmetric mode in the mode splitting with the coupling distance between two microdisks.The research results show that there is a competitive relationship between the symmetric mode and the antisymmetric mode.As the coupling distance increases,the transmittance of the antisymmetric mode first increases and then decreases,and the resonance wavelength is red shifted;the symmetric mode is exactly the opposite.The influence of manufacturing process accuracy on mode splitting is analyzed by calculation.The research results can be used to design high-sensitivity fiber-optic temperature sensors in fiber micro-disks and other fields.

关 键 词：光纤光学 回音壁模式 有限时域差分法 双微盘谐振器 模式分裂 

分 类 号：O436[机械工程—光学工程]