Axial strain sensor based on long-period fiber gratings

Tao Geng; Shixin Geng; Wenlei Yang; Tian Ye; Zhaojun Liu; Renfeng Xue

doi:10.1117/12.2070228

18 September 2014 Axial strain sensor based on long-period fiber gratings

Tao Geng, Shixin Geng, Wenlei Yang, Tian Ye, Zhaojun Liu, Renfeng Xue

Proceedings Volume 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 928228 (2014) https://doi.org/10.1117/12.2070228
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

In this paper, we carry out a periodically taper experiment on standard single-mode optical fiber by electro-thermal fused taper system, and fabricate a long period fiber grating (LPFG). The resonance amplitude of the LPFG is -23dB. Then we have an experimental study about axial strain characteristics of the LPFG. In the axial stretching process of the grating, the period of the grating become larger, the diameter become smaller, and because of the photo-elastic effect, the refractive index of the core and the optical cladding change. Experimental results show that the resonant wavelength peak position of the LPFG had a good linear relationship with the axial strain. With the increase of axial strain, the resonance wavelength shift to short and the sensitivity is about -1.40pm/μepsilon.

Citation Download Citation

Tao Geng, Shixin Geng, Wenlei Yang, Tian Ye, Zhaojun Liu, and Renfeng Xue "Axial strain sensor based on long-period fiber gratings", Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 928228 (18 September 2014); https://doi.org/10.1117/12.2070228

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