光学学报, 2009, 29 (s2): 111, 网络出版: 2010-01-27  

低工艺灵敏度反相三电极电光开关的优化设计

Optimum Design of a Low Fabrication Error Sensitivity Electro-Optic Switch Using Triple-Section Reversed Electrodes
作者单位
吉林大学电子科学与工程学院集成光电子学国家重点联合实验室吉林大学试验区, 吉林 长春 130012
摘要
为降低制作公差对串扰的影响,应用点匹配法、耦合模理论和电光调制理论,优化设计了一种三节交替反相电极聚合物定向耦合电光开关。综合考虑电极覆盖区和非覆盖区波导的影响,导出了功率传输矩阵、输出光功率和传输光功率的新型表达式。并分析了状态电压、开关电压、输出功率、传输功率、插入损耗、串扰、输出波谱及制作公差等特性。模拟结果表明,当制作公差在-500~500 μm范围内时,通过微调状态电压,在中心波长下两个输出端口仍可分别实现小于-50和-60 dB的串扰。与光束传播法(BPM)模拟结果的对比表明,本文给出的分析理论和设计方法具有较高的精度。
Abstract
To effectively decrease the effect of the fabrication error on the crosstalk, a polymer directional coupler electro-optic switch with triple-section reversed electrodes was optimized and designed by using the point matching method, coupled mode theory and electro-optic modulation theory. Considering the influences of the waveguides with/without electrode upon in the coupling region, novel expressions including the power transfer matrix, output powers and propagation powers were obtained. Characteristics were analyzed, involving the state voltages, switching voltage, output powers, propagation powers, insertion loss, crosstalk, output spectrum and fabrication error. Simulation results show that by slightly adjusting the two state voltages, the crosstalk as low as -50 and -60 dB can be achieved for the two output ports, respectively, when the fabrication error of the waveguide length exists from -500 to 500 μm under the central operation wavelength. The proposed analytical theory and design technique are proved to be sufficiently accurate by the comparisons with the simulation results from the beam propagation method (BPM).

郑传涛, 马春生, 闫欣, 陈宏起, 张大明. 低工艺灵敏度反相三电极电光开关的优化设计[J]. 光学学报, 2009, 29(s2): 111. Zheng Chuantao, Ma Chunsheng, Yan Xin, Chen Hongqi, Zhang Daming. Optimum Design of a Low Fabrication Error Sensitivity Electro-Optic Switch Using Triple-Section Reversed Electrodes[J]. Acta Optica Sinica, 2009, 29(s2): 111.

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