Self-mixing laser vibrometer with resolution in the micro and nano meters scale Vibrómetro láser por interferometría de auto-mezclado con resolución en la escala micro y nanométrica

FILGUEIRA, L.E.; SCHMIEGELOW, C.T.

Anales de la Asociacion Fisica Argentina

Centro de Investigaciones en Laseres y Aplicaciones

Año: 2021 vol. 32 p. 15 - 21

We present the development of an interferometer capable of making contactless measurements of vibrations. The results show the we achieve micro-and/or nano-metric measurements without the stabilization of the laser. While there are multiple techniques to achieve this objective, in this case we use a method whose main virtue is the low component count and the self-alignment capacity. The method is based on the optical feedback effect in a laser diode which relies on the use of an internal reference for calibration.