Short-length long period fiber grating for torsion sensing applications

Marta Nespereira; João M. P. Coelho; José Manuel Rebordão

doi:10.1117/12.2272725

22 August 2017 Short-length long period fiber grating for torsion sensing applications

Marta Nespereira, João M. P. Coelho, José Manuel Rebordão

Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104531Z (2017) https://doi.org/10.1117/12.2272725
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal

Abstract

The response of short-length CO2 -induced Long Period Fiber Gratings (LPFGs) sensors to torsion is reported. While engraving, the fiber is submitted to high tension allowing to obtain gratings with shorter lengths, one order of magnitude lower than the usual. Also, the fiber was only irradiated in one side, creating an asymmetrical profile leading to highly birefringent gratings. Good sensitivity to axial twists is demonstrated, with values up to 0.12 nm/(rad/m) for the resonant wavelength shift, and better than 0.03 dBm/(rad/m) for the variation in the intensity (attenuation). Discrimination between rotation direction, clockwise and counterclockwise, can be obtained.

Citation Download Citation

Marta Nespereira, João M. P. Coelho, and José Manuel Rebordão "Short-length long period fiber grating for torsion sensing applications", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104531Z (22 August 2017); https://doi.org/10.1117/12.2272725

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