【摘要】 针对电吸收调制器集成分布反馈激光器(EAM-DFB)的光电混合和端口散射特征,提出了包含自发辐射和俄歇复合的有源等效电路模型,及其散射参量(S参量)求取模型。通过电路级模拟在不同典型参数下的S参量,研究了EAM-DFB的工作特性。模拟得到EAM-DFB的传输参量在-25dB至-60dB内,随频率增高而减小,在调制时增大,并反映出比直调DFB更大的带宽,而反射参量随频率增高而增大,结果与已有的理论和实验吻合。同时发现,减小自发辐射因子或增大驱动电流和限制因子,反射增大传输减小,但后者的传输参量减小缓慢平坦,对调制响应有所改善。更多还原

【Abstract】 Aim at the character of photoelectric mixing and scattering of ports in electro-absorption modulator integrated distributed-feedback semiconductor laser(EAM-DFB),the active equivalent circuit model including spontaneous emission.Auger recombination,and model of calculating scattering parameter (S-Parameter) is established.Based on these models,the characteristic of EAM-DFB is investigated,by simulating S-Parameter on circuit-level for different typical parameters.The results agree with reported theoretical and experimental data,it indicates that transmitted parameter of EAM-DFB is-25dB～-60dB,and decreasing as frequency increasing and when model is modulated,however the reflected parameter increasing in this state.It also found that,whether decreasing spontaneous emission factor or increasing bias current and optical confinement factor can raise reflection and reduce transmission,but the transmission reducing in lattcr is more slowly and flatly,this can improve the modulation response.更多还原