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Applied Optics

Applied Optics


  • Vol. 35, Iss. 25 — Sep. 1, 1996
  • pp: 5191–5197

Surface-bonded and embedded optical fibers as ultrasonic sensors

S. G. Pierce, W. R. Philp, A. Gachagan, A. McNab, G. Hayward, and B. Culshaw  »View Author Affiliations

Applied Optics, Vol. 35, Issue 25, pp. 5191-5197 (1996)

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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.

© 1996 Optical Society of America

Original Manuscript: December 3, 1995
Published: September 1, 1996

S. G. Pierce, W. R. Philp, A. Gachagan, A. McNab, G. Hayward, and B. Culshaw, "Surface-bonded and embedded optical fibers as ultrasonic sensors," Appl. Opt. 35, 5191-5197 (1996)

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