High frequency acoustic waves confined inside a suspended core fiber (SCF) are revealed by numerical simulations for the first time. A standard single mode optical fiber (SMF) is modelled to explain the current research limitations. The acoustic frequency response and energy concentrated in both fibers are evaluated from 50 to 56 MHz with the 3D finite element method. The simulated dispersion curves are compared to the Pochhammer–Chree solutions. The energy in the SCF core at the resonance of 52.84 MHz is approximately 16 times higher compared to the SMF, indicating a new route for the design and fabrication of fiber-based ultrasonic devices.
Bibliographical noteThis is the Accepted Manuscript version of an article accepted for publication in Applied Physics Express. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.35848/1882-0786/ac17d5. The accepted manuscript will be licensed under a CC BY-NC-ND licence after the embargo ends.
Funding: This project has received funding from the European Union´s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 713694 (MULTIPLY). We acknowledge the use of Athena at HPC Midlands+, which was funded by the EPSRC on grant EP/P020232/1 as part of the HPC Midlands+ consortium.