Fig. 1. (a) Structure of the optical fiber sensing probe with 250 μm tapered length under the microscope. (b) Optical fiber sensing probe in the polarization state. (c) Experimental setup diagram and optical fiber probe schematic diagram in this experiment. The scale bar is 100 μm.

Fig. 2. Reflection spectra of the fiber probe at different temperatures. The inset shows the expanded spectrum at 36℃, 38℃, and 40℃.

Fig. 3. Reflection spectra during the temperature increasing process and the cooling process, and the reflection spectrum measured repeatedly one week later.

Fig. 4. (a) Recovery characteristics of the probe. (b) Comparison of temperature sensing characteristics before reaching the clearing point and after restoring anisotropy.

Fig. 5. Temperature sensing characteristics of chiral dopants with different concentrations and different kinds of LCs.