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.
Original language | English |
---|---|
Article number | 117720O |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 11772 |
DOIs | |
Publication status | Published - 18 Apr 2021 |
Event | Optical Sensors 2021 - Virtual, Online, Czech Republic Duration: 19 Apr 2021 → 23 Apr 2021 |
Bibliographical note
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.Keywords
- Curvature sensing
- Fibre Bragg grating
- Multicore fibre
- Twist sensing
- Vector sensors