We theoretically investigate integrated photonic resonators formed by two mutually coupled Sagnac loop reflectors (MC-SLRs). Mode interference in the MC-SLR resonators is tailored to achieve versatile filter shapes with high performance, which enable flexible spectral engineering for diverse applications. By adjusting the reflectivity of the Sagnac loop reflectors (SLRs) as well as the coupling strength between different SLRs, we achieve optical analogues of Fano resonance with ultrahigh spectral slope rates, wavelength interleaving/non-blocking switching functions with significantly enhanced filtering flatness, and compact bandpass filters with improved roll-off. In our designs the requirements for practical applications are considered, together with detailed analyses of the impact of structural parameters and fabrication tolerances. These results highlight the strong potential of MC-SLR resonators as advanced multi-functional integrated photonic filters for flexible spectral engineering in optical communications systems.

中文翻译：

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基于耦合萨尼亚克环反射器的先进多功能集成光子滤波器


我们从理论上研究了由两个相互耦合的 Sagnac 环路反射器 (MC-SLR) 形成的集成光子谐振器。 MC-SLR 谐振器中的模式干扰经过定制，可实现高性能的多功能滤波器形状，从而为各种应用提供灵活的光谱工程。通过调整萨格纳克环形反射器（SLR）的反射率以及不同SLR之间的耦合强度，我们实现了具有超高光谱斜率的法诺共振光学模拟、具有显着增强的滤波平坦度的波长交错/无阻塞切换功能，以及紧凑型带通滤波器，具有改进的滚降功能。在我们的设计中，考虑了实际应用的要求，并对结构参数和制造公差的影响进行了详细分析。这些结果凸显了 MC-SLR 谐振器作为先进多功能集成光子滤波器在光通信系统中灵活光谱工程的巨大潜力。