Combined regenerated fibre Bragg gratings and Fabry-Perot etalons for dual strain and temperature sensing

Zengling Ran; Haihong Bao; Kevin Cook; Xuezhong Wu; Yunjiang Rao; John Canning

doi:10.1117/12.2194860

28 September 2015 Combined regenerated fibre Bragg gratings and Fabry-Perot etalons for dual strain and temperature sensing

Zengling Ran, Haihong Bao, Kevin Cook, Xuezhong Wu, Yunjiang Rao, John Canning

Author Affiliations +

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963459 (2015) https://doi.org/10.1117/12.2194860
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A highly integrated fibre-optic sensor with regenerated fibre Bragg grating (RFBG) and a micro Fabry-Pérot (MFP) is proposed and demonstrated for simultaneous measurement of temperature and strain under high temperature (> 600 °C). The MFP is fabricated by using a 157 nm fluorine gas (F₂) laser to micromachine the core of a standard optical fibre. The RFBG is fabricated by regenerating a seed grating written over the Fabry-Pérot. Since the MFP and RFBG have different sensitivity coefficients, their combination can be used to realise simultaneous measurement of temperature and strain. It is believed that such a high-temperature strain sensor could find important applications in many areas where simultaneous measurement of temperature and strain under high temperature is required.

Citation Download Citation

Zengling Ran, Haihong Bao, Kevin Cook, Xuezhong Wu, Yunjiang Rao, and John Canning "Combined regenerated fibre Bragg gratings and Fabry-Perot etalons for dual strain and temperature sensing", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963459 (28 September 2015); https://doi.org/10.1117/12.2194860

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