A15-b3 - Design and performance analysis of a fiber ultrasonic hydrophone based on a phase-shifted fiber Bragg grating-thin plate coupled structure
- Event
- 2025 ICU PADERBORN - 9th International Congress on Ultrasonics
2025-09-21 - 2025-09-25
Paderborn - Band
- Lectures
- Chapter
- A15-b - Ultrasonic Scattering
- Author(s)
- X. Wu, Z. Li, B. An - State Key Laboratory of Acoustics, Beijing (China)
- Pages
- 106 - 109
- DOI
- 10.5162/Ultrasonic2025/A15-b3
- ISBN
- 978-3-910600-08-9
- Price
- free
Abstract
To improve the sensitivity of a phase-shifted fiber Bragg grating (PS-FBG) for ultrasonic sensing, a coupled structure is proposed innovatively. The coupled structure is composed of a PS-FBG and a thin plate. The coupling mechanism between the plate’s bending modes and the fiber’s strain response have been studied theoretically and numerically. Experimental results further demonstrate sensitivity improvement across a broad ultrasonic frequency range. The proposed structure exhibits significant potential for ultrasonic sensing.