Fig. 1. Schematic diagram of intensity interrogation device based on temperature sensor

Fig. 2. Principle of intensity interrogation method based on temperature sensor. (a) Input spectrum of BLS and transmission spectrum at ΔT=0; (b) output spectrum of temperature sensor at ΔT=0; (c) input spectrum of BLS and transmission spectrum at ΔT>0; (d) output spectrum of temperature sensor at ΔT>0

Fig. 3. Relationship between output power ratio of intensity interrogation method and temperature change

Fig. 4. Output power ratio varying with temperature under different differences between FP etalon free spectral range and MRR free spectral range

Fig. 5. Experimental setup for temperature sensor and optical microscope diagram of MRR. (a) Experimental setup for temperature sensor; (b) main part of experimental setup for temperature sensor; (c) optical microscope diagram of MRR

Fig. 6. Transmission spectrum of temperature sensor and spectrum of combined light source

Fig. 7. Data points of intensity interrogation and fitting curve

Fig. 8. P₂/P₁ value varying with time at temperature of 26 ℃