2023/11/13 by Ricardo E. da Silva, Jonas H. Osório, da Silva, Ricardo E. +13
Engineering · #Advanced Fiber Optic Sensors #Advanced Photonic Communication Systems #FOS: Physical sciences #Optics (physics.optics) #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.2311.07776
openalex publication_date 2023/11/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We demonstrate a broadband acousto-optic notch filter based on a tubular-lattice hollow-core fiber for the first time. The guided optical modes are modulated by acoustically induced dynamic long-period gratings along the fiber. The device is fabricated employing a short interaction length (7.7 cm) and low drive voltages (10 V). Modulated spectral bands with 20 nm half-width and maximum depths greater than 60 % are achieved. The resonant notch wavelength is tuned from 743 to 1355 nm (612 nm span) by changing the frequency of the electrical signal. The results indicate a broader tuning range compared to previous studies using standard and hollow-core fibers. It further reveals unique properties for reconfigurable spectral filters and fiber lasers, pointing to the fast switching and highly efficient modulation of all-fiber photonic devices.