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文中提出了一种基于双波导双微环—MZ干涉仪的简单、新颖的带宽和谐振波长同时可调的带通滤波器。通过耦合模理论,推导了此结构的透射率公式,利用MATALAB软件编写程序,模拟了微环温度的改变、不同环之间的温度差、耦合器的分束比对谐振波长和带宽可调性的影响。结果表明微环温度的改变会使谐振波长移动,不同环之间的温度差会影响滤波器的带宽,耦合器的分束比会使透射谱出现不对称性。这些结果对微环谐振滤波器的开发与应用具有重要指导意义。
In this paper, a simple and novel band-pass filter with adjustable bandwidth and resonant wavelength based on dual-waveguide dual micro-ring-MZ interferometer is proposed in this paper. Based on the coupled-mode theory, the transmittance formula of the structure is deduced. The program is programmed by MATALAB software to simulate the change of the temperature of the micro-ring, the temperature difference between different rings, the splitting ratio of the coupler, the resonant wavelength and the adjustable bandwidth Impact. The results show that the change of the micro-ring temperature will cause the resonance wavelength to move. The temperature difference between different rings will affect the bandwidth of the filter. The splitting ratio of the coupler will make the transmission spectrum appear asymmetric. These results have important guiding significance for the development and application of the micro-ring resonator filter.