Fibre Bragg grating inscription into a seven core fibre and its application as a vector bending sensor

Abstract

This paper demonstrates a highly effective method for fibre Bragg grating (FBG) inscription into a seven core fibre (7CF) and its application as an effective vector bending sensor. The development of multicore fibres (MCFs) and enabling the fabrication of FBGs into them result in a solution for multi-parameter measurements such as temperature/strain/bending/twist. The FBG in the central core of 7CF is on the neutral axis and therefore it is sensitive only to thermal and insensitive to deformational change, whereas the FBGs in the none-central cores that are evenly distributed over the 7CF cross-section can facilitate the measurement of structure deformation, such as bending, loading and twist. Furthermore, the FBGs in different cores respond to the physical perturbations differently in various orientations, offering vector sensing to measure both amplitude and direction of the structure change. The 7CF-FBG sensors are highly applicable for mechanical structures and flexible medical instruments.

Publication DOI: https://doi.org/10.1117/12.2589063
Divisions: College of Engineering & Physical Sciences > Electrical, Electronic & Power Engineering
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology
College of Engineering & Physical Sciences
Additional Information: Copyright 2021 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Uncontrolled Keywords: Curvature sensing,Fibre Bragg grating,Multicore fibre,Twist sensing,Vector sensors,Electronic, Optical and Magnetic Materials,Condensed Matter Physics,Computer Science Applications,Applied Mathematics,Electrical and Electronic Engineering
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference article
Published Date: 2021-04-18
Accepted Date: 2021-04-01
Authors: Sahoo, Namita
Bao, Weijia
Liu, Shen
Tan, Yidong
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)

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