Yufang Chen, Hongdan Wan, Qian Chen, Quan Zhou, Zuxing Zhang. High Sensitivity Optical Fiber Temperature Sensor Based on Rare-Earth-Doped Double-Fiber Peanut[J]. Chinese Journal of Lasers, 2020, 47(1): 0110001
- Chinese Journal of Lasers
- Vol. 47, Issue 1, 0110001 (2020)
Fig. 1. Schematic of fiber temperature sensor based on RDDFP
Fig. 2. Simulation of RDDFP. (a) Geometric structure design; (b) simulation results of mode filed propagation of core-mode and cladding-mode in the RDDFP; (c) relationship between power of core-mode, power of cladding-mode, and total energy of RDDFP and distance of transmission
Fig. 3. Simulation of relation between interference intensity and interference length L
Fig. 4. Experimental setup of proposed fiber temperature sensor
Fig. 5. Experimental results of interference spectra of EDDFP varying with temperature. (a) Interference spectra measured at different temperatures; (b) relationship between wavelength shift and temperature
Fig. 6. Experimental results of interference spectra of YDDFP varying with temperature. (a) Interference spectra measured at different temperatures; (b) relationship between wavelength shift and temperature
Fig. 7. Experimental results of EDDFP sensor for different L. (a) Interference spectra measured at the same temperature of 25 ℃; (b) temperature sensitivity
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Table 1. Measured interference spectral parameters and sensitivity of EDDFP for different interference lengths
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