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