All-fibre twist sensor system based on 45° and 81° tilted fibre gratings

Zhijun Yan; Adedotun Adebayo; Kaiming Zhou; Lin Zhang; David Webb

doi:10.1117/12.884845

18 May 2011 All-fibre twist sensor system based on 45° and 81° tilted fibre gratings

Zhijun Yan, Adedotun Adebayo, Kaiming Zhou, Lin Zhang, David Webb

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.

Citation Download Citation

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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