Photorefractive vibrometer for the detection of high amplitude vibrations on rough surfaces

Philippe Delaye (1) , Sébastien de Rossi (1) , Gérald Roosen (1)

1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia

We present and characterize theoretically and experimentally a photorefractive velocimeter. This device, based on two-wave mixing in a rapid photorefractive crystal, measures the instantaneous velocity of a vibrating target. It is particularly adapted to the measurement of high-amplitude (up to several mm) low-frequency (up to several kHz) vibrations. Instantaneous velocities as high as 25 mm s-1 are expected to be measured with common photorefractive semiconductors and CW lasers

Domaines: Optique [physics.optics]

Philippe Delaye, Sébastien de Rossi, Gérald Roosen. Photorefractive vibrometer for the detection of high amplitude vibrations on rough surfaces. Journal of Optics A: Pure and Applied Optics, 2000, 2, pp.209-215. ⟨10.1088/1464-4258/2/3/307⟩. ⟨hal-00673962v2⟩