基于量子点半导体光放大器(QD-SOA)的交叉增益调制效应(XGM)实现了逻辑或非门。对比度(CR)、码型效应(PE)和消光比(ER)是衡量逻辑或非门性能的重要指标,通过对这些指标分析可以获得最佳的输入泵浦光功率和探测光功率。采用牛顿法和四阶龙格-库塔法求解速率方程和光场传输方程,计算了不同泵浦光功率和探测光功率下输出对比度CR、码型效应PE、消光比ER的值。结果表明,选择适当的泵浦光功率和探测光功率可以完善逻辑或非门的性能。 A cross-gain modulation effect (XGM) based on quantum dot semiconductor optical amplifier (QD-SOA) realizes a logical NOR gate. Contrast (CR), pattern effect (PE) and extinction ratio (ER) are important indicators of the logical or non-gate performance. By analyzing these indexes, the best input pump power and probe power can be obtained. Newton method and fourth order Runge-Kutta method were used to solve the velocity equation and light field transmission equation. The output contrast ratio (CR), pattern effect (PE) and extinction ratio (ER) were calculated under different pump power and probe power. The results show that choosing proper pump power and detecting optical power can improve the performance of logic or non-gate.