Acoustic-optical interactions in fibers for ultrasonic inspection of structures

Kara Peters

doi:10.1117/12.3028666

10 May 2024 Acoustic-optical interactions in fibers for ultrasonic inspection of structures

Kara Peters

Proceedings Volume 12951, Health Monitoring of Structural and Biological Systems XVIII; 1295102 (2024) https://doi.org/10.1117/12.3028666
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

Optical fibers are one example of waveguides that can transmit multimodal information. This information can be encoded in different optical modes in a multi-mode fiber or in different types of modes. For example, optical fibers have also recently been demonstrated to be excellent waveguide for acoustic modes. This means that sensing does not have to be performed at the location that the optical fiber is bonded to the structure, but instead Lamb waves can be converted into propagating acoustic modes in optical fibers. These modes can be transmitted to different sensor locations within the optical fiber. This presentation discusses the physical characteristics of these optical fiber acoustic modes and their use to increase the signal to noise ratio of the collection of Lamb wave information. Experimental verifications of the physical behavior of these modes using micro-laser Doppler vibrometry is also presented.

Conference Presentation

Citation Download Citation

Kara Peters "Acoustic-optical interactions in fibers for ultrasonic inspection of structures", Proc. SPIE 12951, Health Monitoring of Structural and Biological Systems XVIII, 1295102 (10 May 2024); https://doi.org/10.1117/12.3028666

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