A dual modality optical fiber sensor
Abstract
We propose and demonstrate a fibre optic system based on bi-tapered silica fibre that can simultaneously measure strain and fibre curvature. Both modalities on the signal can be extracted with no measurable crosstalk between them. The experimental signal has a pure phase modulation when strain is applied to the tapered fibre optic section of the sensor and the signal shows only intensity modulation when an un-tapered fibre section is bent. High sensitivity is achieved from the experimental results for strain and bending losses and the estimation of measurement errors is 0.2 and 0.1%, respectively. This system offers low-cost, compactness and it can be adapted for structural health monitoring.
- Publication:
-
Journal of Modern Optics
- Pub Date:
- February 2018
- DOI:
- 10.1080/09500340.2017.1397220
- Bibcode:
- 2018JMOp...65..342H
- Keywords:
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- Fibre optic sensor;
- tapered optical fibre;
- simultaneous independent measurement;
- curvature;
- strain