AI 中文总结
该研究基于微梳驱动横向滤波系统，实现了兼具陡峭频谱过渡与高度可重构性的MWP Fano滤波器，可独立调谐Fano的三个特征参数，为微波信号处理提供了通用方案。
AI 中文摘要
微波光子（MWP）Fano滤波器具有非对称的滤波形状，可实现陡峭的频谱过渡，适用于高带宽微波信号处理，如频率鉴别。然而，依赖光学滤波器产生的Fano共振直接映射的传统方法，难以同时实现陡峭的频谱过渡和高度可重构性。本文提出并实验演示了一种基于微梳驱动横向滤波系统实现MWP Fano滤波器的新方法。利用微梳提供的大量梳齿作为离散抽头，该横向滤波系统可合成与Fano共振高度相似的滤波响应，实验中分别实现了高达33.8 dB/GHz的滚降率和25.7 dB/GHz的斜率率。此外，仅需编程调整抽头系数而无需更改任何硬件，即可实现高度可重构的滤波响应。实验中验证了对Fano的三个特征参数（非对称因子、共振线宽和中心频率）的独立调谐。这些结果证实了该方法在实现具有陡峭频谱过渡的高度可重构MWP Fano滤波器方面的有效性，为满足实际应用中的多样化需求提供了强大的通用性。
英文摘要
Microwave photonic (MWP) Fano filters, featuring asymmetric filter shapes that enable steep spectral transitions, are attractive for high bandwidth microwave signal processing such as frequency discrimination. However, achieving both steep spectral transitions and a high degree of reconfigurability remains challenging for conventional methods relying on direct mapping of Fano resonances generated by optical filters. Here, we propose and experimentally demonstrate a new way for realizing MWP Fano filters based on a microcomb-driven transversal filter system. Leveraging the large number of comb lines provided by microcombs as discrete taps, the transversal filter system can synthesize filter response that closely resembles Fano resonances, yielding high rolloff rates and slope rates up to 33.8 dB / GHz and 25.7 dB / GHz in our experiments, respectively. In addition, by simply programming the tap coefficients without changing any hardware, highly reconfigurable filter response can be realized. We experimentally demonstrate independent tuning of all three Fano characteristic parameters, including the asymmetry factor, resonance linewidth, and center frequency. These results verify the effectiveness of our approach for implementing highly reconfigurable MWP Fano filters with steep spectral transitions, offering strong versatility for meeting diverse requirements in practical applications.
Comments14 pages, 10 Figures, 61 references
Journal refJournal of Lightwave Technology Volume 44 (2026)
