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Multi-point optical fiber pressure sensor
Author(s): Linh V. Nguyen; Erik P. Schartner; Dale Otten; Zheng Yu; David Lancaster; Heike Ebendorff-Heidepriem; Stephen C. Warren-Smith
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Paper Abstract

This paper reports on a multi-point optical fiber pressure sensor using fiber Bragg gratings (FBGs) written on an exposed core optical fiber (ECF) by femtosecond laser. The pressure sensing elements were constructed as Fabry-Perot (FP) interferometers of different cavity lengths using pairs of FBGs with identical resonant wavelength. In this fashion an interference pattern was formed within the FBG bandwidth with much narrower fringes, leading to better detection limit. Fast Fourier transform (FFT) was used to calculate the phase change of the FP interference pattern with respect to applied pressure. The pressure sensitivity was proportional to the cavity FP cavity length, and reached -0.672 rad/MPa for the case of FP with 9 mm cavity length. The proposed sensor has potential to measure pressure at very high temperature thanks to its single material configuration.

Paper Details

Date Published: 30 December 2019
PDF: 2 pages
Proc. SPIE 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, 112000X (30 December 2019); doi: 10.1117/12.2541295
Show Author Affiliations
Linh V. Nguyen, The Univ. of Adelaide (Australia)
Erik P. Schartner, The Univ. of Adelaide (Australia)
ARC Ctr. of Excellence for Nanoscale BioPhotonics (Australia)
Dale Otten, Univ. of South Australia (Australia)
Zheng Yu, The Univ. of Adelaide (Australia)
David Lancaster, Univ. of South Australia (Australia)
Heike Ebendorff-Heidepriem, The Univ. of Adelaide (Australia)
ARC Ctr. of Excellence for Nanoscale BioPhotonics (Australia)
Stephen C. Warren-Smith, The Univ. of Adelaide (Australia)
ARC Ctr. of Excellence for Nanoscale BioPhotonics (Australia)


Published in SPIE Proceedings Vol. 11200:
AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019
Arnan Mitchell; Halina Rubinsztein-Dunlop, Editor(s)

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