Hongtai Lin, Li Zhang, Xin Liu, Xinshuo Lu, Xiao Deng, Liqin Cui, Guohua Han. Research on Dynamic Characteristics of Temperature Sensing Based on Loop Ring-Down Cavity with FBG[J]. Acta Optica Sinica, 2020, 40(10): 1006003
- Acta Optica Sinica
- Vol. 40, Issue 10, 1006003 (2020)
Fig. 1. Theoretical model of FBG loop ring-down cavity
Fig. 2. Simulated results of FBG loop ring-down cavity with different temperature perturbations. (a) FBG spectral response; (b) exponential decay curve of intensity; (c) logarithm curve of intensity
Fig. 3. Temperature sensing setup of FLRDC-FBG based on FPGA
Fig. 4. Signal of optical pulse. (a) Period of optical pulse; (b) width of optical pulse
Fig. 5. Pulse ring-down waveforms and wavelength evolution at different temperatures. (a)-(d) Pulse ring-down waveforms; (e)-(h) wavelength evolution
Fig. 6. Fitting curves at different temperatures. (a) Evolution process of ring-down time; (b) relationship between temperature and (1/τ-1/τ0)
Fig. 7. Transmission spectral evolution curves at different temperatures. (a) Transmission spectra of FBG; (b) linear relationship between Δλ and (1/τ-1/τ0)
Fig. 8. Operation performance. (a) Repeatability results (b) stability results
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Table 1. Simulated parameters of FBG loop ring-down cavity
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