Based on the attractive elasto-optic properties of single-mode microstructured polymer optical fibres (SM mPOFs) reported elsewhere,10 mode polarisation may be used as sensing probe for several parameters of interest like mechanical pressure. We report on a simplified detection scheme that does not require measuring the actual polarisation state of the light emerging from the mPOF. A polariser and a photodetector in a proper configuration are only required. The detected light intensity shows a high linearity with applied force to the mPOF.
The polarisation state of light may be exploited in single-mode polymer mPOFs for sensing purposes.
The bend-induced birefringence varies linearly with the inverse square of the bend radius, whereas the
twist-induced polarisation rotation varies linearly with the bre twist angle. Both e ects are highly reproducible and show higher sensitivity than their glass counterparts.