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

作者：Zhang F Z^*; Walheim S; Schimmel T; Marti O

来源：Review of Scientific Instruments, 2010, 81(3): 035116.

DOI：10.1063/1.3368637

• amplifiers
• measurement by laser beam
• oscillations
• quartz

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.

• 出版日期2010-3