In general, to fit various application scenarios, different types of optical filters are needed and designed individually, which leads to high cost and long development times. Here we proposed a reconfigurable multi-functional optical filter based on self-coupled microring assisted MZI structure, which can be reconfigured into five different kinds of devices, including the optical switch, asymmetric MZI filter, ring assisted MZI filter, double injection microring resonator and self-coupled micro-ring assisted MZI filter. An analytical model was established based on the transfer matrix method to investigate the function reconfigurations, which were then verified experimentally by simply controlling the six thermo-optical phase shifters in the structure. Furthermore, our proposed reconfigurable multi-functional optical filter provides performances that are comparable to the individual devices or even better, which has the potential to be applied in the integrated optical signal processing and microwave photonics systems.

中文翻译：

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基于自耦合微环谐振器辅助MZI结构的集成多功能光学滤波器

通常，为了适应各种应用场景，需要并分别设计不同类型的滤光片，这导致高成本和长开发时间。在这里，我们提出了一种基于自耦合微环辅助MZI结构的可重构多功能光学滤波器，可以将其重构为五种不同的器件，包括光开关，非对称MZI滤波器，环辅助MZI滤波器，双注入微环谐振器和自耦合微环辅助MZI滤波器。建立了基于传递矩阵法的分析模型，以研究功能的重新配置，然后通过简单地控制结构中的六个热光移相器进行实验验证。此外，