A Simple Ultrasensitive Displacement Sensor Based on a High Bend Loss Single-Mode Fibre and a Ratiometric Measurement System

Authors

Pengfei Wang, Technological University DublinFollow
Gilberto Brambilla, University of Southampton
Yuliya Semenova, Technological University DublinFollow
Qiang Wu, Technological University DublinFollow
Gerald Farrell, Technological University DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

Electrical and electronic engineering, Communication engineering and systems

Publication Details

Journal of Optics, Vol.13, 7, 2011, article no. 075402.

DOI: 10.1088/2040-8978/13/7/075402

Abstract

An all-fibre displacement sensor with a simple configuration and capable of monitoring sub-50 nm displacements is proposed and investigated experimentally. The proposed fibre displacement sensor consists of a half-loop structure of bare high bend loss single-mode fibre 1060XP and a ratiometric power interrogation system. By measuring the change in transmission ratio in the ratiometric system, a change in displacement can be measured. The displacement sensor is sensitive to temperature and an experimental investigation of this sensitivity is presented. It is found that the peak shift response has a linear variation with temperature; therefore, temperature dependence can be mitigated by a suitable displacement correction process. The proposed macrobending fibre based displacement sensor benefits from simplicity and low cost and achieves a comparable resolution as compared with other conventional fibre optic sensors.

DOI

https://doi.org/10.1088/2040-8978/13/7/075402

Recommended Citation

Wang, P., Brambilla, G., Semenova, Y., Wu, Q., Farrell, G.: A Simple Ultrasensitive Displacement Sensor Based on a High Bend Loss Single-Mode Fibre and a Ratiometric Measurement System. Journal of Optics, Vol.13, 7, 2011, article no. 075402. doi:10.1088/2040-8978/13/7/075402

Funder

IRCSET, Marie Curie Actions under FP7, Royal Society London, SFI