The design and experimental demonstration of a large, ultrahigh-quality (Q) factor, and single-mode operation silicon ring resonator based on a strip silicon photonic waveguide are presented. The ring resonator comprises multimode straight strip waveguides (MMWG), single-mode strip waveguides (SMWG), 90° Bezier bends, and linear tapers. The SMWG are used in the coupling region to achieve mode coupling for the fundamental mode without exciting the higher-order mode. The MMWG, 1.6 $\mu$m in width, are used to decrease the propagation loss. The taper smoothens the straight-to-bend transition and reduces the intermode crosstalk at the interface between the straight and bent waveguides. The design of the 90° Bezier bend ensures that only the maintained fundamental mode propagates at the bend with ultralow loss and low intermode interference. The resonator fabricated in this study had an ultrahigh-Q factor of 1.54 $\times$ 10⁶, with a free spectrum range of 0.036 nm, and achieved an actual loss of unit transmission of approximately 0.25 dB/cm.

介绍了基于带状硅光子波导的大型、超高品质 (Q) 因子和单模操作硅环形谐振器的设计和实验演示。环形谐振器包括多模直条形波导 (MMWG)、单模条形波导 (SMWG)、90°贝塞尔弯曲和线性锥形。SMWG 用于耦合区域以实现基模的模式耦合，而无需激发高阶模式。MMWG，1.6$\mu$m 的宽度，用于减少传播损耗。锥形使直线到弯曲的过渡变得平滑，并减少了直线和弯曲波导之间界面处的模间串扰。90° Bezier 弯曲的设计确保只有保持的基模在弯曲处以超低损耗和低模间干扰传播。本研究中制造的谐振器具有 1.54 的超高 Q 因子$\times$10 ⁶，自由光谱范围为0.036 nm，实现了大约0.25 dB/cm的单位传输实际损耗。