PULSED LASER EXCITATION AND OPTICAL DETECTION OF RAYLEIGH WAVES ON A METALLIC SPHERE

X. Jia , D. Royer , G. Quentin

Rayleigh waves have been optically generated and detected on a metallic sphere. The source was a pulsed YAG laser. The mechanical displacement was measured, at a point diametrically opposite to the laser impact, by an heterodyne interferometer. The resonance frequencies of stainless-steel sphere of diameter 20 mm was rapidly obtained from the fast Fourier transform of the probed signal. The variation of the group velocity was also deduced from the resonance spectrum. Experimental results agree with the analysis.

Domaines: Articles anciens

X. Jia, D. Royer, G. Quentin. PULSED LASER EXCITATION AND OPTICAL DETECTION OF RAYLEIGH WAVES ON A METALLIC SPHERE. Journal de Physique IV Proceedings, 1992, 02 (C1), pp.C1-789-C1-792. ⟨10.1051/jp4:19921172⟩. ⟨jpa-00251133⟩