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This paper aims to investigate the implementation of bonded UFPR using an optical fiber as the ultrasound waveguide. A longitudinal UFPR is created by bonding a section of an optical fiber with an FBG on an aluminum plate. The experimental setup consists of a broadband ultrasound transducer to excite broadband longitudinal waves into the structure and an FBG-based ultrasound sensing system to measure the resonance of the bonded UFPR. A mechanism to bond the optical fiber to the structure with controlled length and thickness has been developed. Time-domain and frequency-domain analyses confirm UFPR resonances and reveal interference peaks, supporting the principles of the FPR. This work also explores the effect of adhesive length on resonance characteristics.
Vahid Jafarpour andHaiying Huang
"Realizing bonded ultrasound Fabry-Perot resonator (UFPR) using an optical fiber as the ultrasound waveguide", Proc. SPIE 12949, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024, 1294919 (10 May 2024); https://doi.org/10.1117/12.3016472
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Vahid Jafarpour, Haiying Huang, "Realizing bonded ultrasound Fabry-Perot resonator (UFPR) using an optical fiber as the ultrasound waveguide," Proc. SPIE 12949, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024, 1294919 (10 May 2024); https://doi.org/10.1117/12.3016472