DocumentCode
2784171
Title
Absolute surface displacement measurement using pulsed photo-electromotive-force laser vibrometer
Author
Chen, Zhongyang ; Khurgin, Jacob ; Rodriguez, Ponciano ; Lorenzo, Jose ; Trivedi, Sudhir ; Jin, Feng ; Wang, Chen-Chia ; Libbey, Brad ; Habersat, James
Author_Institution
Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
fYear
2007
fDate
6-11 May 2007
Firstpage
1
Lastpage
2
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.
Keywords
Acoustic beams; Displacement measurement; Frequency; Laser beams; Optical pulses; Phase modulation; Power lasers; Pulse measurements; Surface emitting lasers; Vibrometers;
fLanguage
English
Publisher
ieee
Conference_Titel
Quantum Electronics and Laser Science Conference, 2007. QELS '07
Conference_Location
Baltimore, MD, USA
Print_ISBN
978-1-55752-834-6
Type
conf
DOI
10.1109/QELS.2007.4431126
Filename
4431126
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