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Acoustic-surface-wave amplitude and phase measurements using laser probes

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4 Author(s)
R. M. de la Rue ; University of Glasgow, Department of Electronics & Electrical Engineering, Glasgow, UK ; R. F. Humphryes ; I. M. Mason ; E. A. Ash

The investigation of acoustic-field distributions on free surfaces is important in several different classes of application. Measurements of the phase of acoustic surface waves using optical probes allow direct measurement of their velocity. A number of different optical-probe types are compared on the basis of sensitivity and stability. The operation and design of an optical heterodyne probe, capable of high-precision phase and group-velocity measurement, is described.

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Electrical Engineers, Proceedings of the Institution of  (Volume:119 ,  Issue: 2 )