Surface- bonded and embedded optical fibres as ultrasonic sensors

Pierce, Stephen and Philp, WR and Gachagan, Anthony and McNab, Alistair and Hayward, Gordon and Culshaw, Brian (1996) Surface- bonded and embedded optical fibres as ultrasonic sensors. Applied Optics, 35 (25). pp. 5191-5197. ISSN 1559-128X (https://doi.org/10.1364/AO.35.005191)

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Abstract

The effectiveness of surface-bonded and embedded optical fibers for the detection of ultrasonic Lamb waves in 2–3-mm-thick steel, carbon-fiber-reinforced plastic (CFRP) and glass-reinforced plastic (GRP) plates are compared. A novel integrating ultrasonic sensor was achieved using the signal arm of an actively stabilized 633-nm homodyne Mach–Zehnder fiber interferometer which was either bonded directly to the plate surface or spliced to single-mode fibers embedded within a composite plate during manufacture. An embedded fiber is shown to be about 20 times more sensitive to Lamb wave motions than a surface-bonded fiber. However, the latter may be more practical.

ORCID iDs

Pierce, Stephen ORCID logoORCID: https://orcid.org/0000-0003-0312-8766, Philp, WR, Gachagan, Anthony ORCID logoORCID: https://orcid.org/0000-0002-9728-4120, McNab, Alistair, Hayward, Gordon and Culshaw, Brian;
CORE (COnnecting REpositories)