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.
No takes yet. Share an insight, caveat, or question.
Venkatesh et al. (1991) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: