Reconfigurable microwave photonic Fano filters based on optical Kerr microcombs

[2608.15025] Reconfigurable microwave photonic Fano filters based on optical Kerr microcombs Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Physics > Optics arXiv:2608.15025 (physics) [Submitted on 15 Aug 2026] Title: Reconfigurable microwave photonic Fano filters based on optical Kerr microcombs Authors: Qi Zou , Jiayang Wu , Yang Sun , Yang Li , Guanghui Ren , Thach G. Nguyen , Xingyuan Xu , Bill Corcoran , Sai T. Chu , Roberto Morandotti , Arnan Mitchell , David J. Moss View a PDF of the paper titled Reconfigurable microwave photonic Fano filters based on optical Kerr microcombs, by Qi Zou and 11 other authors View PDF Abstract: 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. Comments: 14 pages, 10 Figures, 61 references Subjects: Optics (physics.optics) Cite as: arXiv:2608.15025 [physics.optics] (or arXiv:2608.15025v1 [physics.optics] for this version) https://doi.org/10.48550/arXiv.2608.15025 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Journal of Lightwave Technology Volume 44 (2026) Related DOI : https://doi.org/10.1109/JLT.2026.3723832 Focus to learn more DOI(s) linking to related resources Submission history From: David Moss [ view email ] [v1] Sat, 15 Aug 2026 04:23:30 UTC (2,080 KB) Full-text links: Access Paper: View a PDF of the paper titled Reconfigurable microwave photonic Fano filters based on optical Kerr microcombs, by Qi Zou and 11 other authors View PDF view license Current browse context: physics.optics < prev | next > new | recent | 2026-08 Change to browse by: physics References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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