提出一种可以产生皮秒量级开关窗口的光波导微环谐振器,对其设计与性能进行了分析和研究。采用多环层叠结构来设计微环谐振器的传输特性曲线,利用特性曲线的非线性特征,在正弦电压的作用下改变材料的折射率可获得一个较窄的开关窗口。采用耦合矩阵理论研究了系统的调制特性以及开关窗口特性,分析了开关窗口宽度和消光比与驱动电压的关系。研究结果表明,10 GHz驱动电压情况下,开关窗口宽度、消光比和插入损耗可以分别优于10 ps,40 dB和1 dB。只需要电的控制信号而无需高质量的光控制脉冲,且具有工作速率高、结构简单、消光比高、传输损耗小和工作电压低等特点。

An optical waveguide microring resonator for picosecond switching window generation is reported. The design and simulation are presented. The multiple-ring-cascaded structure is adopted to design the transmission characteristic curve of the microring resonator. Utilizing the nonlinearity of the transmission characteristic curve,a narrow switching window can be generated with a sine-wave electrical control signal to shift the refractive index of the material. The modulation characteristics and switching window are researched with coupling matrix formalism. The dependences of the width and extinction ratio of the switching window on the driving voltage are analyzed. Results show that the width,extinction ratio and the insertion loss of the switching window driven by 10 GHz electrical voltage are better than 10 ps,40 dB and 1 dB,respectively. The proposed picosecond switching window generation technology only requires electrical control signal instead of high-quality optical control pulse. It possesses a high operation speed with simple structure,low transmission loss,high extinction ratio and low operation voltage.