Bending vector sensing based on periodic core-offset ultra-long period fiber grating

Shanshan Zhang; Jizhe Yin; Cheng Zhang; Jixuan Wu; Changyun Miao

doi:10.1117/12.2605979

1 November 2021 Bending vector sensing based on periodic core-offset ultra-long period fiber grating

Shanshan Zhang, Jizhe Yin, Cheng Zhang, Jixuan Wu, Changyun Miao

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 120572P (2021) https://doi.org/10.1117/12.2605979
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

Bending vector sensing is demonstrated based on periodic core-offset ultra-long period fiber grating, which is mainly composed of splicing two fiber ends with a purposed lateral offset in a single mode fiber (SMF).Through the measured resonance wavelength and the peak attenuation of the core-offset ultra-long period fiber grating(CO-ULPFG), the curvature amplitude and orientation can be simultaneously determined in vertical directions, reaching up to -1.833 nm/m^-1 and -1.674 nm/m^-1 at the 0° and 180° orientations range and reaching up to -0.583 nm/m^-1 and -0.479 nm/m^-1 at the 90° and 270° orientations ranging from 0 m^-1 to 7.041 m^-1, respectively. The bending sensitivity in different directions is 6-10 times that of LPFG with similar structure. Because of the excellent linear response, the effect of temperature on bending sensing can be eliminated by using a measurement matrix. The advantages of bending direction recognition, high bending sensitivities and compact structure make the sensor attractive for structural deformation monitoring.

Citation Download Citation

Shanshan Zhang, Jizhe Yin, Cheng Zhang, Jixuan Wu, and Changyun Miao "Bending vector sensing based on periodic core-offset ultra-long period fiber grating", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 120572P (1 November 2021); https://doi.org/10.1117/12.2605979

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