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针对两节独立反相集总电极聚合物Y型耦合器电光开关响应速度慢的问题,通过对该器件两节电光区的波导进行推挽极化,设计了一种无偏置行波电极高速电光开关.为了获得低的驱动电压、良好的阻抗匹配和光波与微波间较小的折射率失配,对电极参数做了设计和优化.通过对施加的方波开关信号做傅里叶变换并结合行波传输线理论,给出了一种用于建模和表征器件高频响应的解析分析法.对该器件的数值计算结果表明,在1 550nm中心工作波长下,其3dB状态电压为0 V,开关电压为2.68V,上分支状态电压和下分支状态电压分别为-1.34V和+1.34V,器件的插入损耗和串扰分别小于3.55和-30dB,10%~90%上升时间和下降时间均为3.90ps,截止开关频率可达128.2GHz.
Aiming at the problem of slow response of the electro-optic switch of two Y-shaped polymer couplers with independent inverted lumped electrodes, the waveguide of two electro-optic regions of the device is push-pull polarized. In order to obtain low driving voltage, good impedance matching and small refractive index mismatch between light wave and microwave, the parameters of the electrode are designed and optimized.Through the Fourier transform of the applied square wave switching signal In the light of the theory of traveling wave transmission line, an analytic method for modeling and characterizing the high frequency response of the device is given. The numerical results of this device show that at a working wavelength of 1 550 nm, the 3dB state voltage is 0 V, the switching voltage is 2.68V, the upper branch state voltage and the lower branch state voltage are -1.34V and + 1.34V respectively, the insertion loss and crosstalk of the device are respectively less than 3.55 and -30dB, 10% ~ 90% rise time and fall time Are 3.90ps, cut-off switching frequency up to 128.2GHz.