Fig. 1. Structure of F-P cavity cascaded FBG

Fig. 2. Force control system

Fig. 3. Fiber sensing system

Fig. 4. Structure of F-P cavity

Fig. 5. Reflection spectrum of the sensor

Fig. 6. Reflective spectrum of F-P cavity during force variation

Fig. 7. Relationship between force and wavelength for fiber F-P cavity

Fig. 8. Reflective spectrum of FBG during force variation

Fig. 9. Relationship between force and wavelength for FBG

Fig. 10. Reflective spectrum of F-P cavity during temperature variation

Fig. 11. Relationship between temperature and wavelength for fiber F-P cavity

Fig. 12. Reflective spectrum of FBG during temperature variation

Fig. 13. Relationship between temperature and wavelength for FBG

Fig. 14. Stability test of reflection spectrum