基于脊型波导的跑道型环形谐振器的偏振模式分离特性分析

Analysis of Polarization Mode Splitting Character in Race-track Ring Resonator Based on Rib Waveguide

设计和分析了基于绝缘体上硅的脊型波导的偏振模式分离谐振腔。通过分析超小脊型波导的模式双折射,将该微环谐振腔应用到定向耦合器,实现从准TE和准TM偏振模式在特定波长范围内同一输出端口的分离。试验证明,准TM偏振模式分离后的Q值达23 000±1 000,是未分离时的两倍。该新型跑道型环形谐振腔的特点在光学元件中的应用非常有前景,为新型环形耦合器的深入研究提供了理论参考。

The design and analysis of a polarization mode splitting resonator based on silicon-on insulator rib waveguide is presented. By analyzing the mode birefringence in the ultra-small rib waveguide,this micro-ring resonator was introduced to directional coupler to realize the splitting of the quasi-TE and quasi-TM polarization modes from the same output port in specific wavelength range. It is demonstrated that after splitting the quasi-TM polarization mode,the Q value of the quasi-TE polarization mode is 23 000 ± 1000,about twice of that without splitting the quasi-TM polarization mode. This novel characteristic of race-track ring resonators is quite promising in many applications of optical components and meaningful in further study of novel ring resonator.