Fig. 1. Structure and spectrum of the optical fiber. (a) Optical picture of the tapered polymer; (b) reflection interference spectrum of the tapered polymer; (c) optical picture of the fiber end face; (d) reflection interference spectrum of the fiber end face

Fig. 2. Schematic diagram of light transmission in the sensing probe

Fig. 3. Schematic diagram of measuring device for the temperature characteristics of sensor probe

Fig. 4. Variation curve of reflection interference spectrum with environmental temperature. (a) Low temperature environment; (b) high temperature environment

Fig. 5. Position of the center wavelength of the reflection interference peak. (a) Low temperature environment; (b) high temperature environment