Abstract
The modulation efficiency of a tubular-lattice hollowcore fiber (HCF) employing flexural acoustic waves is investigated in detail for the first time. The main acousto-optic properties of the HCF are evaluated, using 2D and 3D models based on the finite element method. The induced coupling of the fundamental and first higher-order modes is simulated from 743 to 1355 nm. The most relevant acoustic (amplitude, period, strain, energy) and optical (effective index, beat length, birefringence, coupling coefficient) parameters are analyzed. The simulations are compared to experimental results and indicate higher modulation performance in HCFs compared to standard optical fibers. In addition, useful insights into the design and fabrication of all-fiber acousto-optic devices based on HCFs are provided, enabling potential application in tunable spectral filters and mode-locked fiber lasers.
| Original language | English |
|---|---|
| Number of pages | 7 |
| Journal | Journal of Lightwave Technology |
| Early online date | 10 Mar 2025 |
| DOIs | |
| Publication status | E-pub ahead of print - 10 Mar 2025 |
Bibliographical note
Copyright © 2025 IEEE. All rights reserved, including rights for text and data mining and training of artificial intelligence and similar technologies. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Keywords
- 2D/3D finite element method
- Acousto-optic devices
- flexural acoustic waves
- tubular-lattice hollow-core fiber