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arXiv · 1211.5328

Absolute measurement of small-amplitude vibrations by time-averaged heterodyne holography with a dual local oscillator

Nicolas Verrier·Michael Atlan
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Abstract

We report a demonstration of the measurement of the ratio between an optical modulation side band component and the non-shifted light component by time-averaged heterodyne holography in off-axis and frequency-shifting configuration, through coherent frequency-division multiplexing with a dual optical local oscillator. Experimental results of sinusoidal vibration sensing are reported. This technique enables absolute measurements of sub-nanometric out-of-plane vibration amplitudes.

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Nicolas Verrier, Michael Atlan. 2012-11-22. Absolute measurement of small-amplitude vibrations by time-averaged heterodyne holography with a dual local oscillator. https://doi.org/10.1364/ol.38.000739

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