Analysis on strain and temperature sensing characteristic of sampled fiber grating

Dandan Zhu; Zhiquan Li; Xiuxian Tian; Fu Sun; Haifang Wang

doi:10.1117/12.725505

29 January 2007 Analysis on strain and temperature sensing characteristic of sampled fiber grating

Dandan Zhu, Zhiquan Li, Xiuxian Tian, Fu Sun, Haifang Wang

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 627962 (2007) https://doi.org/10.1117/12.725505
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

Sampled fiber Bragg grating(SFBG) has caused extensive research interest due to its special filtering characteristic, strict wavelength interval, compact structure, easy integration and low cost etc. Based on coupling-mode theory, the reflective spectrum of sampled fiber Bragg grating was analyzed using transmission matrix method. Strain and temperature sensing characteristics of sampled fiber Bragg grating were discussed in the paper. Wavelength shift and transmission intensity vary linearly with strain and temperature. The change of strain and temperature can be determined simultaneously by a single sampled fiber grating. In the experiment, the strain and temperature of sampled fiber Bragg grating change simultaneously, the photoelastic coefficients of sampled fiber Bragg grating were P₁₁=0.121, P₁₂=0.27. The Poisson ratio of optical fiber core stuff was 0.17, the thermal expansion coefficient was 5.5×10^-7/°C, and the calorescence coefficient of optical fiber was 8.3×10^-6/°C. We can get that A, B, C and D were separately -0.00055nm/ε, 0.013nm/°C, - 0.00033/ε, -0.00011/°C by calculating. Strain measurement ranged from 0 με to 2500με. Temperature measurement ranged from 0°C to 300°C.

Citation Download Citation

Dandan Zhu, Zhiquan Li, Xiuxian Tian, Fu Sun, and Haifang Wang "Analysis on strain and temperature sensing characteristic of sampled fiber grating", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627962 (29 January 2007); https://doi.org/10.1117/12.725505

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