All-fiber broadband spectral acousto-optic modulation of a tubular-lattice hollow-core optical fiber

Ricardo E. da Silva, Jonas H. Osório, Gabriel L. Rodrigues, David J. Webb, Frédéric Gérôme, Fetah Benabid, Cristiano M. B. Cordeiro, Marcos A. R. Franco

Research output: Contribution to journalArticlepeer-review


We demonstrate a broadband acousto-optic notch filter based on a tubular-lattice hollow-core fiber for the first time to our knowledge. 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.
Original languageEnglish
Pages (from-to)690-693
Number of pages4
JournalOptics Letters
Issue number3
Early online date29 Jan 2024
Publication statusPublished - 1 Feb 2024

Data Access Statement

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.


  • Fiber lasers
  • Long period fiber gratings
  • Notch filters
  • Photonic crystal fibers
  • Photonic devices
  • Spectral properties


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