Title :
Optical interferometric measurement of guided surface acoustic wave strains inside a solid
Author :
Jia, Xiuping ; Mattei, C. ; Quentin, G.
Author_Institution :
Groupe de Phys. des Solides, Paris VII Univ.
fDate :
31 Oct-3 Nov 1993
Abstract :
The strain measurement of guided acoustic waves by optical interferometry is described. Unlike the traditional photoelastic technique, this method enables one to measure the phase shift rather than the change of the polarization state of the light. A comprehensive formalism based on the acoustically perturbed index ellipsoid of refraction and the Jones calculus is demonstrated. A relationship is obtained between the optical phase shift and the dilatational acoustic strains of guided waves. The strain fields of the Lamb waves s0 and a0 measured with the present method inside fused quartz, are in good agreement with the theoretical analysis
Keywords :
acoustic waveguides; acousto-optical effects; light interferometry; strain measurement; surface acoustic wave devices; surface acoustic waves; Jones calculus; Lamb waves; acoustically perturbed index ellipsoid of refraction; dilatational acoustic strains; fused quartz; guided surface acoustic wave strains; optical interferometric measurement; optical phase shift; phase shift; strain fields; strain measurement; Acoustic measurements; Acoustic waves; Optical interferometry; Optical refraction; Optical surface waves; Phase measurement; Phase shifting interferometry; Photoelasticity; Strain measurement; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339521
