Fibre-tip displacement sensor using sinusoidal FM-based technique
- 29 August 1991
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 27 (18) , 1652-1654
- https://doi.org/10.1049/el:19911033
Abstract
A frequency modulated dual-electrode DFB laser is used as the optical source for a sensor which is immune to polarisation and acoustic fluctuations affecting its fibre-optic leads. Detection of the quadrature components of the reflected signal allows unambiguous direction determination. A measurement accuracy of ± 20nm is demonstrated over a range of several millimetres.Keywords
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