【摘要】 应用耦合模理论、电光调制理论、保角变换法和镜像法,给出了分析聚合物定向耦合电光开关高频响应特性的功率传输矩阵新方法,导出了输出功率、上升时是、下降时间、开关时间及截止开关频率的表达式。为了获得较低的传输损耗、较好的阻抗匹配、较小的开关电压以及较高的截止频率,优化设计了器件的波导结构和电极结构。模拟结果表明,所设计器件的开关电压为1.457 V,耦合长度为4.374 mm,开关时间为32.8 ps,截止开关频率为114.7 GHz。与点匹配法的计算结果和实验结果的对比表明,该理论分析方法具有较高的精度。更多还原

【Abstract】 In terms of the coupled-mode theory, electro-optic modulation theory, conformal transforming method and imaging method, a transfer matrix technique is proposed for analyzing the high-frequency response characteristics of the polymer directional coupler electro-optic switches. Expressions of output power, rise time, fall time, switching time and cutoff switching frequency are deduced. The structures of waveguide and electrode are optimized for getting the minimum propagation loss, good matching impedance, low switching voltage and high cutoff switching frequency. Simulation results show that the switching voltage is about 1.457 V, coupling length is about 4.374 mm, switching time is about 32. 8 ps, and cutoff switching frequency is about 114. 7 GHz. Comparisons are performed among the results of this technique, those of the point-matching method, and the experimental results, which show that the proposed technique has high accuracy.更多还原