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Optica Publishing Group
  • Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies
  • OSA Technical Digest (CD) (Optica Publishing Group, 2007),
  • paper JThD50

Absolute Surface Displacement Measurement using Pulsed Photo-Electromotive-Force Laser Vibrometer

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Abstract

We demonstrate experimentally a new technique for measuring unambiguously the surface displacement of a vibrating surface using a high sensitivity pulsed laser vibrometer based on the photo-electromotive-force (photo-EMF) sensors. By intentionally introducing a reference vibration with known frequency and amplitude, we show that the photo-EMF pulsed laser vibrometer is able to determine the absolute value of surface displacement independent of the test subject’s surface quality and the amount of laser power density impinging on the sensor.

© 2007 Optical Society of America

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