【摘要】 依据相速度匹配原理 ,运用点匹配法和微波传输理论 ,为行波型波导电光调制建立了数学模型 ,对电光调制器中行波电极的特征参数以及调制带宽等高频特性进行了数值模拟 .计算结果表明 ,适当地设计电极和缓冲层的厚度 ,能实现微波与光波的相速度匹配 ,从而使器件的 -3d B调制带宽达到1 0 0 GHz以上 ,为高频、宽带行波型电极的优化设计提供了可靠的理论依据 .更多还原

【Abstract】 The principle of velocity matching and the point-matching method is used to analyzethe characteristic parameters and modulation-frequecy bandwidth of travelling-wave electrode structures for optical modulators. The numerical results show that velocity matching can be achieved by adjusting the thickness of electrode and buffer. In addition,the 3d B modulating bandwidth exceeds 1 0 0 GHz. The results provide important theoretical evidences for the optimizing design of high- frequency and broad-band traveling-wave electrode structures.更多还原