【摘要】 采用有限元软件Ansys、运用有限元法,对脊波导结构铌酸锂电光调制器进行了优化设计。通过将传统结构与脊波导的比较分析,提出采用聚四氟乙烯部分取代缓冲层中的二氧化硅的结构,能更好的实现微波等效折射率的降低以达到与光波折射率的匹配,同时能保持更大的特性阻抗以实现阻抗匹配,从而更好的提高器件性能。更多还原

【Abstract】 The analysis of LiNbO₃ electro-optic modulator with ridge structure is given in this paper by using the finite-element method.By compared with the conventional structure,we bring up a new structure which use polytetrafluoroethylene to take the place of the SiO₂ partially in the buffer layer, which can reduce the effective index easily and greatly increase the characteristical impedance to match the requirement,so it can enhance the capability greatly.更多还原