VIBRÓMETRO LÁSER POR INTERFEROMETRÍA DE AUTO-MEZCLADO CON RESOLUCIÓN EN LA ESCALA MICRO Y NANOMÉTRICA

Abstract

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