New laser apparatus to measure oscillation amplitude down to picometer at megahertz frequencies

A laser setup to study shear oscillations at small amplitudes with resonance frequencies up to 3 MHz is presented. The new approach combines gauging of the Gaussian laser beam and a lock-in amplifier. The device is tested with a 3 MHz AT-cut quartz crystal. The oscillation amplitude at the edge of t...

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Bibliographic Details
Published in:Review of scientific instruments 2010-03, Vol.81 (3), p.035116-035116-4
Main Authors: Zhang, F. Z., Walheim, S., Schimmel, T., Marti, O.
Format: Article
Language:English
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Summary:A laser setup to study shear oscillations at small amplitudes with resonance frequencies up to 3 MHz is presented. The new approach combines gauging of the Gaussian laser beam and a lock-in amplifier. The device is tested with a 3 MHz AT-cut quartz crystal. The oscillation amplitude at the edge of the electrode on the quartz crystal is measured with a resolution of 2 pm.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.3368637