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An optical homodyne technique for measurement of amplitude and phase of subangstrom ultrasonic vibrations

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1 Author(s)

An optical homodyne technique is utilized to measure sub-angstrom dynamic mechanical deformations. For measurement in the frequency domain, where synchronous detection is used both the amplitude and phase of the mechanical signal can be measured with a high sensitivity; displacements less than 10-2Å were measured with normal environment acoustic noise. Measurement in the time domain is also feasible with reduced sensitivity.

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Proceedings of the IEEE  (Volume:57 ,  Issue: 7 )