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

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

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© The Institution of Electrical Engineers
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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.

Inspec keywords: acoustic variables measurement; phase measurement; holography; probes

Other keywords: sonic measurements; free surfaces; laser probes; probes; phase measurement; surface phenomena; group velocity measurement; optical heterodyne probe; acoustic field distributions; acoustic surface waves

Subjects: Phase and gain measurement; Acoustic wave devices; Holography

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