介绍了自电光效应器件(SEED)的基本结构及工作原理,通过对其等效电阻-电容(RC)模型的分析,得出SEED电压-时间(V-t)特性及电压-半径(V-r)扩散特性的表达式.为优化器件性能,利用仿真,在不同光斑尺寸控制光入射下,对SEED的开关性能进行比较.结果表明,采用光斑半径较小的控制光入射可提高SEED的开关速度;SEED只有在控制光入射中心处才能保持其良好的开关特性.
A basic structure and operation principles of self electro-optic effect device's (SEED' s) are described. Its equivalent resistance-capacitance (RC) model is applied to obtain SEED's voltage-time (V-t) characteristic and voltage-radius (V-r) diffusion characteristic expressions. SEED's switch performances with different radiuses of input control beams are compared by simulation. Simulations reveal that SEED's switch characteristic can be effectively improved with a small input radius, and al- so SEED can only keep its excellent switch characteristic at the input light beam's center.