Abstract

FILGUEIRA, L. E.  and  SCHMIEGELOW, C. T.. Self-mixing laser vibrometer with resolution in the micro and nano meters scale. An. AFA [online]. 2021, vol.32, n.1, pp.15-21. ISSN 0327-358X.  http://dx.doi.org/10.31527/analesafa.2021.32.1.15.

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.

Keywords : interferometry; vibrometry; displacement measurement; laser diode; optical feedback.

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