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

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 frequen...

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Bibliographic Details
Published inQuantum Electronics and Laser Science (Online) pp. 1 - 2
Main Authors Zhongyang Chen, Khurgin, J., Rodriguez, P., Lorenzo, J., Trivedi, S., Feng Jin, Chen-Chia Wang, Libbey, B., Habersat, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2007
Subjects
Acoustic beams
Displacement measurement
Frequency
Laser beams
Optical pulses
Phase modulation
Power lasers
Pulse measurements
Surface emitting lasers
Vibrometers
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ISSN2160-9004
DOI10.1109/CLEO.2007.4453349

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Summary: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.
ISSN:2160-9004
DOI:10.1109/CLEO.2007.4453349