Design of Si_(3)N_(4) ridge-slot micro-ring resonator and generation of dual-comb based on orthogonally bicolor pumping  

作　　者：WEN Jin WANG Qian YU Huimin WU Zhengwei ZHANG Hui 

机构地区：[1]School of Science,Xi'an Shiyou University,Xi'an 710065,China [2]Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection,Xi'an 710065,China [3]Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas wells,Xi'an 710065,China

出　　处：《Optoelectronics Letters》2024年第11期647-653,共7页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61505160);the Innovation Capability Support Program of Shaanxi (No.2018KJXX-042);the Natural Science Basic Research Program of Shaanxi(No.2019JM-084);the State Key Laboratory of Transient Optics and Photonics(No.SKLST202108);the Postgraduate Innovation and Practice Ability Development Fund of Xi’an Shiyou University(No.YCS22213174)。

摘　　要：A novel high quality-factor(Q)micro-ring resonator(MRR)structure based on the Si_(3)N_(4) ridge-slot waveguide is proposed,and the MRR is pumped by orthogonally polarized bicolor pumping to generate dual-comb.We optimized the structure of MRR by the finite element method and precise dispersion engineering,which finally obtained the suitable MRR geometry with negative dispersion characteristics at 1550 nm,having Q of 1.7×10^(7)and the absorption loss as low as 2.6×10^(-5) dB/cm.The simulation model of generating dual-comb is established as coupled Lugiato-Lefever equation(LLE),which takes the higher order dispersion,cross-phase modulation(XPM),multiphoton absorption,and external pumping into account.Solved by the split-step Fourier method(SSFM)and the fourth-order Runge-Kutta(RK4)method,the numerical results show that the generated dual-comb is periodically equally spaced distribution,but with slightly different intensities in the time domain.In the frequency domain,there are 64 comb teeth with intensities higher than-100 dBm with a bandwidth of 120 nm.Particularly,in the case of bicolor orthogonal polarization pumping,a smaller amount of detuning does not greatly affect the bandwidth of the dual-comb.

关 键 词：PUMPING RESONATOR polarization 

分 类 号：TN256[电子电信—物理电子学]