Fibre-optic vibration probe

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© The Institution of Electrical Engineers
Published 20/07/2012

Abstract

A practical all-fibre laser vibrometer is described. The design has been optimised for hand-held use and incorporates a frequency-scanned laser diode and a single-mode optical fibre coupler. The vibration information is extracted by a pseudoheterodyne technique.

Inspec keywords: fibre optic sensors; vibration measurement; laser velocimetry

Other keywords: laser Doppler velocimetry; hand-held use; vibration probe; single-mode optical fibre coupler; fibre optic vibrometer; pseudo-heterodyne technique; frequency-scanned laser diode

Subjects: Fibre optics; Spatial variables measurement; Spatial variables measurement; Mechanical measurement methods and techniques for solids; Laser applications; Fibre optics and fibre waveguides; Sensing devices and transducers; Fibre optic sensors

References

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      • Buchhave, P.: `Laser Doppler vibration measurements using variable frequency shift', DISA Inf., 1975, 18, p. 15-29
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      • Jackson, D.A., Kersey, A.D., Corke, M., Jones, J.D.C.: `Pseudoheterodyne detection scheme for optical interferometers', 1982, 18, p. 1081-1083
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