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Piezoelectric and ferroelectric devices

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  • Physics [1]
  • Fundamental areas of phenomenology [1]
  • Optics [1]
  • Fibre optics and fibre waveguides [1]
  • Fibre optic sensors; fibre gyros [1]
  • Acoustics [1]
  • Ultrasonics, quantum acoustics, and physical effects of sound [1]
  • Acoustic emission [1]
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  • 1997 [1]

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Fibre optic system for the monitoring of asymmetric Lamb wave modulation in thin films
Author(s): R.J. Dewhurst, B.A. Williams
Source: Electronics Letters, Volume 33, Issue 21, October 1997, p. 1813 - 1815
Type: Article
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For monitoring temporal modulation of a laser-generated asymmetric (a0) Lamb wave, a non-contact fibre optic sensor has been used. Simultaneously, an electromagnetic acoustic transducer (EMAT) sensed in-plane acoustic transients of the symmetric (s0) Lamb wave. Measurements in 75 µm thick aluminium film show that a0 amplitude modulation is associated with a perturbation from the symmetric wave.

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