All-fibre twist sensor system based on 45° and 8° tilted fibre gratings


We experimentally demonstrated a highly sensitive twist sensor system based on a 45° and an 81° tilted fibre grating (TFG). The 81°-TFG has a set of dual-peaks that are due to the birefringence induced by its extremely tilted structure. When the 81°-TFG subjected to twist, the coupling to the two peaks would interchange from each other, providing a mechanism to measure and monitor the twist. We have investigated the performance of the sensor system by three interrogation methods (spectral, power-measurement and voltage-measurement). The experimental results clearly show that the 81°-TFG and the 45°-TFG could be combined forming a full fibre twist sensor system capable of not just measuring the magnitude but also recognising the direction of the applied twist.

Publication DOI:
Additional Information: Zhijun Yan, Adedotun Adebayo, Kaiming Zhou, Lin Zhang and David Webb, "All-fibre twist sensor system based on 45° and 81° tilted fibre gratings", Proc. SPIE 7753, 77538E (2011). 21st International Conference on Optical Fiber Sensors (OFS21), 15-19 May 2011, Ottawa (CA). Copyright 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI:
Event Title: 21st International Conference on Optical Fiber Sensors
Event Type: Other
Event Dates: 2011-05-15 - 2011-05-19
Uncontrolled Keywords: highly sensitive twist sensor system,45°,81°,tilted fibre grating,TFG,tilted structure,sensor system,full fibre twist sensor system,magnitude,direction,Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Condensed Matter Physics
ISBN: 978-0-8194-8246-4
Last Modified: 02 Jan 2024 18:34
Date Deposited: 16 Jun 2011 10:14
Full Text Link: http://proceedi ... ticleid=1347143
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2011-05-17
Authors: Yan, Zhijun
Adebayo, Adedotun
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Webb, David (ORCID Profile 0000-0002-5495-1296)



Version: Published Version

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