Fig. 1. Diagram of designed sensor structure

Fig. 2. Light path diagram

Fig. 3. Transmission spectra of sensors. (a) SMF-SCF-SMF structure; (b) SMF-PMF-SCF -SMF structure

Fig. 4. Spatial frequency spectra for PMF lengths of 0 cm and 10 cm. (a) PMF length is 0 cm; (b) PMF length is 10 cm

Fig. 5. Transmission spectra of sensor with different SCF lengths. (a) L_SCF=80 mm; (b) L_SCF=100 mm; (c) L_SCF=120 mm

Fig. 6. Variation in transmitted spectrum of sensor with temperature at different SCF lengths, and variation in resonant wavelength with temperature. Variation in transmitted spectrum of sensor with temperature when (a) L_SCF=80 mm, (b) L_SCF=100 mm, and (c) L_SCF=120 mm; (d) variation in resonant wavelength with temperature

Fig. 7. Variation in transmitted spectrum of sensor with curvature at different SCF lengths, and variation in resonant wavelength with curvature. Variation in transmitted spectrum of sensor with curvature when (a) L_SCF=80 mm, (b) L_SCF=100 mm, and (c) L_SCF=120 mm; (d) variation in resonant wavelength with curvature

Table 1. Curvature responses at different dips