Fig. 1. Principle of FBG sensor

Fig. 2. MATLAB simulation of the relationship between resonant wavelength and temperature changes of sensitized FBG

Fig. 3. (a) FBG model; (b) EpoCore adhesive sensitizing FBG model

Fig. 4. (a) Deformation of unsensitized FBG sensor; (b) Deformation of sensitized FBG sensor

Fig. 5. FBG sensor preparation device

Fig. 6. (a) Diagram of packaging and heating FBG sensor; (b) Physical photo of solidification and packaging

Fig. 7. Temperature calibration device of FBG sensor

Fig. 8. (a) Temperature calibration of FBG sensor after the first solidification; (b) Temperature calibration of FBG sensor after the second solidification

Fig. 9. Temperature calibration of unsensitized FBG sensor

Fig. 10. Resonance wavelength of FBG sensor at different stages

Fig. 11. (a) Diagram of fiber grating temperature measurement system; (b) Physical photo of fiber grating temperature measurement system

Fig. 12. The measurement result of temperature stability