Fig. 1. Schematic diagram of parallel optical fiber Fabry-Perot sensor structure

Fig. 2. Schematic diagrams of vernier effect spectra. (a) Sensing cavity; (b) reference cavity; (c) superposition spectrum

Fig. 3. Strain simulation diagram of single sensing cavity

Fig. 4. Strain simulation diagrams of parallel structure sensor. (a) M=8; (b) M=9

Fig. 5. Sensor manufacturing flow chart

Fig. 6. Diagram of strain experiment test device

Fig. 7. Strain test of single sensing cavity. (a) Reflection spectra drift diagram; (b) linear fitting

Fig. 8. Strain testing of the sensor. (a) Sample 1; (b) sample 2

Fig. 9. Strain response of sample 1. (a) Sample 1 reflection spectra envelope drift map; (b) linear fitting

Fig. 10. Strain response of sample 2. (a) Sample 2 reflection spectra envelope drift map; (b) linear fitting

Fig. 11. Temperature response of single sensing cavity. (a) Reflection spectra drift map; (b) linear fitting

Fig. 12. Temperature response of sample 1. (a) Reflection spectra envelope drift map; (b) linear fitting

Fig. 13. Temperature response of sample 2. (a) Reflection spectra envelope drift map; (b) linear fitting