title: Absolute measurement of small-amplitude vibrations by time-averaged heterodyne holography with a dual local oscillator.
abstract: We report a demonstration of the measurement of the ratio between an optical modulation sideband component and the nonshifted 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 subnanometric out-of-plane vibration amplitudes.
authors: Institut Langevin, Fondation Pierre-Gilles de Gennes, Centre National de la Recherche Scientifique (CNRS) UMR 7587, Paris, France.
authors: Nicolas
authors: N
authors: Verrier
authors: Michael
authors: M
authors: Atlan