聚合物串联耦合双环电光开关的优化

利用耦合模理论、电光调制理论和微环谐振理论,提出一个聚合物串联耦合双环电光开关器件模型,在1.55 μm谐振波长下对该器件进行了模拟和优化.结果为：微环波导芯截面尺寸为1.6×1.6 μm2,波导芯与电极间的限制层厚度为1.6 μm,电极厚度为0.15 μm,微环半径为15.2 μm,微环与信道间的耦合间距为0.14 μm,微环与微环间的耦合间距为0.6 μm,输出光谱的3 dB带宽约为0.06 nm,开关电压约为6 V左右,插入损耗约为2.2 dB,串扰约为－20 dB.所设计的双环电光开关较单环型电光开关不仅输出光谱更加平坦陡峭,非谐振光更弱,而且开关电压更低.

Simulation and Optimization of Polymer Electro-Optic Double Series-Coupled Microrings Resonator Switches

In terms of the coupled mode theory,microring resonance theory and electro-optic modulation theory,a reasonable project is proposed for designing a polymer electro-optic switch based on the double series-coupled microrings.The simulation and optimization are performed under the resonant wavelength of 1.55 μm,the results are as follows:the core size of the microring is 1.6×1.6 μm2,confined layer between the core and the electrode is 1.6 μm,thickness of the electrode is 0.15 μm,radius of the microring is 15.2 μm,coupling gap between the micoring and the channel is 0.14 μm,that between the micoring and the microring is 0.6 μm,3 dB bandwidth is 0.06 μm,switching voltage is 6 V,insertion loss is 2.2 dB,and crosstalk is -20 dB.The output spectrum is flatter and steeper than that of the single microring.These results show that the designed device exhibits favorable switching functions.