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设计了一种新型改进结构马赫-曾德尔干涉(MZI)电光开关,即在传统结构MZI电光开关中,使用一个相位发生器(PGC)取代一个3 dB耦合器。给出了改进器件的模型和工作原理,导出了振幅传输矩阵,分析了相移补偿原理和开关条件,优化了结构参数,模拟了传输功率、输出功率、输出频谱、插入损耗、串扰等特性。仿真结果表明,所设计器件的开关电压为2.445 V,开关时间为18.1 ps,拓展后的输出频谱为110 nm,工作波长在1492≤λ≤1602 nm范围内,器件的插入损耗小于2.24 dB,串扰小于-30 dB。设计结果与基于光束传播法(BPM)的Optiwave软件模拟结果吻合较好。
A new improved Mach-Zehnder Interferometer (MZI) electro-optic switch was designed, in which a phase generator (PGC) was substituted for a 3 dB coupler in a conventional MZI electro-optical switch. The model and working principle of the improved device are given. The amplitude transfer matrix is derived. The phase shift compensation principle and switching conditions are analyzed. The structural parameters are optimized and the characteristics of transmission power, output power, output spectrum, insertion loss and crosstalk are simulated. The simulation results show that the switching voltage of the designed device is 2.445 V, the switching time is 18.1 ps, the expanded output spectrum is 110 nm, the operating wavelength is in the range of 1492≤λ≤1602 nm, the insertion loss of the device is less than 2.24 dB, and the crosstalk Less than -30 dB. The design results agree well with the Optiwave software simulation results based on the beam propagation method (BPM).