聚合物微环谐振器电光开关阵列的优化与模拟

Optimization and Simulation of an Electro-Optic Polymer Microring Resonator Switch Array

利用耦合模理论、电光调制理论和微环谐振理论,提出了一个聚合物微环谐振器电光开关阵列的模型。该器件由N-1个微环和N条平行信道构成,在微环上施加不同方式的驱动电压,可以实现N条信道的开关功能。以7微环8信道结构为例,在1550nm谐振波长下对该器件进行了优化和模拟。结果表明,微环波导芯的截面尺寸为1.7μm×1.7μm,波导芯与电极间的缓冲层厚度为2.5 μm,电极厚度为0.2μm,微环半径为13.76 μm,微环与信道间的耦合间距为0.1 4μm,输出光谱的3 dB带宽约为0.05 nm,开关电压约为8.1 V左右,插入损耗约为0.23～4.6 dB,串扰小于-20 dB。

In terms of the coupled-mode theory, microring resonance theory and electro-optic modulation theory, a structural model is proposed for designing an electro-optic polymer microring resonator switch array. This device consists of N-1 microrings and N parallel channels. By applying operation voltages in different manners on the microrings, the switching functions can be realized in the N channels. Taking 7 microrings and 8 channels as an example, the optimization and simulation are performed under the resonant wavelength of 1550 nm. The results are as follows： the core size of the microring is 1.7 μm× 1.7 μm, the buffer layer thickness between the core and the electrode is 2.5 μm, the electrode thickness is 0.2 μm, the microring radius is 13.76 μm, the coupling gap between the micoring and the channel is 0. 14 μm, the 3 dB bandwidth of the output spectrum is about 0. 05 nm, the switching voltage is about 8.1 V, the insertion loss is about 0.23-4.6 dB, and the crosstalk is less than -20 dB.