27 July 1998 Embedded fiber optic delivery system for laser-generated ultrasounds
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A health monitoring system for composite material structures combining good compatibility of each embedded sensor and small number of needed sensors could be an active system based on Lamb waves propagation and using for both generation and detection only optical fibers. The present work deals with laser generation of ultrasounds inside the composite material, thanks to embedded optical fibers driving the laser pulse. Emphasis is given to: (1) the energy deposition in the vicinity of the optical fiber tip and the existence of an energy threshold for safe and repetitive use of the delivery system, (2) the relative configuration of the embedded fiber optic and reinforcement fibers, (3) the displacement field generated. Results obtained with pure resin and carbon-epoxy samples are presented.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel L. Balageas, Daniel L. Balageas, Nicolas Jaroslavsky, Nicolas Jaroslavsky, Marc Dupont, Marc Dupont, Francois X. Lepoutre, Francois X. Lepoutre, } "Embedded fiber optic delivery system for laser-generated ultrasounds", Proc. SPIE 3329, Smart Structures and Materials 1998: Smart Structures and Integrated Systems, (27 July 1998); doi: 10.1117/12.316915; https://doi.org/10.1117/12.316915

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