基于计算机软件的光子晶体光纤电磁场分析

摘要

In this paper,a new kind of directional coupler is designed by using the typical PCF structure of etching cycle gap in metal-medium-metal structure.The H transmission model of PCF is established,and the mathematical model of the overall reflection coefficient and transmission coefficient of the model are obtained.The analysis of polarization coupling characteristics based on computer software shows that the designed PCF can penetrate through the gap to the gap,and can realize the periodic propagation of the gap.The analysis of the influence of periodic gap shows that when the gap size is smaller than the thickness of the metal layer,it is possible to achieve higher coupling efficiency and shorter coupling distance.The time response analysis shows that the model has the fs time response and the time dynamic characteristics are highly nonlinear.It can control the relaxation rate of photons with the gain energy transformation and achieve the coupling output control of PCF.%采用典型的金属-介质-金属结构中刻蚀周期缝隙的光子晶体光纤(PCF)结构,设计了一种新型的定向耦合器,建立了PCF的H传输模型,得到了模型整体反射系数和透射系数的数学模型.基于计算机软件的偏振耦合特性分析表明,设计的PCF通过缝隙向缝隙渗透,能够实现缝隙周期性传播.周期缝隙的影响分析得出,缝隙小于金属层厚度时,能够实现更高的耦合效率,更短的耦合距离.由时间响应分析可以看出,模型具备了fs时间响应,时间动态特性有较高的非线性,能利用增益能量变换控制光子的弛豫率,实现PCF的耦合输出控制.