FIBER OPTIC-SYSTEM FOR THE MONITORING OF ASYMMETRIC LAMB WAVE MODULATION IN THIN-FILMS

Authors
DEWHURST RJ WILLIAMS BA
Citation
Rj. Dewhurst et Ba. Williams, FIBER OPTIC-SYSTEM FOR THE MONITORING OF ASYMMETRIC LAMB WAVE MODULATION IN THIN-FILMS, Electronics Letters, 33(21), 1997, pp. 1813-1815
Citations number
6
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
Electronics Letters → ACNP
ISSN journal
00135194
Volume
33
Issue
21
Year of publication
1997
Pages
1813 - 1815
Database
ISI
SICI code
0013-5194(1997)33:21<1813:FOFTMO>2.0.ZU;2-1
Abstract
For monitoring temporal modulation of a laser-generated asymmetric (a( 0)) Lamb wave, a non-contact fibre optic sensor has been used. Simulta neously, an electromagnetic acoustic transducer (EMAT) sensed in-plane acoustic transients of the symmetric (s(0)) Lamb wave. Measurements i n 75 mu m thick aluminium film show that a(0) amplitude modulation is associated with a perturbation from the symmetric wave.