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18 May 2011 All-fibre twist sensor system based on 45° and 81° tilted fibre gratings
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77538E (2011) https://doi.org/10.1117/12.884845
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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, 21st International Conference on Optical Fiber Sensors, 77538E (18 May 2011); https://doi.org/10.1117/12.884845
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