Simultaneous measurement of refractive index and temperature based on a partial cone-shaped FBG

Liang Qi; Chun-Liu Zhao; Shuqin Zhang; Zaixuan Zhang; Shangzhong Jin

doi:10.1117/12.970495

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17 October 2012 Simultaneous measurement of refractive index and temperature based on a partial cone-shaped FBG

Liang Qi, Chun-Liu Zhao, Shuqin Zhang, Zaixuan Zhang, Shangzhong Jin

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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84214B (2012) https://doi.org/10.1117/12.970495
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A refractive index and temperature simultaneous measurement sensor based on a partial cone-shaped fiber Bragg grating (FBG) was demonstrated. The bandwidth of the partial cone-shaped FBG is only effected by the surround refractive index (SRI), while the wavelength decided by the un-etched FBG is only sensitive to temperature. Utilizing the obvious difference of the bandwidth and the wavelength on temperature and the refractive index, two parameters can be distinguished and measured simultaneously using one partial cone-shaped FBG. Experimental results show that the proposed sensor has a SRI sensitivity of -13.669 nm/RIU in the range of 1.33~1.42 and a temperature sensitivity of 9.8 pm/°C in the range of 20~80°C.

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Liang Qi, Chun-Liu Zhao, Shuqin Zhang, Zaixuan Zhang, and Shangzhong Jin "Simultaneous measurement of refractive index and temperature based on a partial cone-shaped FBG", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84214B (17 October 2012); https://doi.org/10.1117/12.970495

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