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.
作者
林春婷
吴根柱
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)
出处
《光学学报》
EI
CAS
CSCD
北大核心
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)。
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
fiber optics
whispering gallery modes
finite time domain difference method
dual microdisk resonator
mode splitting
