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为提高全光波长转换器的波长转换效率,在量子点半导体光放大器(QD-SOA)波长转换特性研究的基础上,分别对基于交叉增益调制(XGM)效应和交叉相位调制(XPM)效应的全光波长转换器的转换效率进行了仿真分析。利用三能级QD-SOA模型并基于XGM型全光波长转换器,计算了输入脉冲宽度、有源区长度、损耗系数、最大增益模式和电子跃迁时间的变化对转换效率的影响。结果表明,减小输入脉冲宽度、损耗系数、电子跃迁时间和增加有源区长度、最大增益模式均可以提高全光波长转换器的转换效率。该研究对全光逻辑异或门的设计及QD-SOA的应用有一定的指导意义。
In order to improve the wavelength conversion efficiency of the all-optical wavelength converter, based on the research of the wavelength conversion characteristics of QD-SOA, the effects of cross-gain modulation (XGM) and cross-phase modulation All-optical wavelength converter conversion efficiency of the simulation analysis. Based on the three-level QD-SOA model and based on the XGM all-optical wavelength converter, the influences of the input pulse width, active region length, loss coefficient, maximum gain mode and electronic transition time on the conversion efficiency are calculated. The results show that reducing the input pulse width, loss coefficient, electronic transition time, increasing the active region length and maximum gain mode all can improve the conversion efficiency of the all-optical wavelength converter. This research has certain guiding significance for the design of all-optical logic XOR gate and the application of QD-SOA.