Fig. 1. Microscopic image of (a) cross-sectional image of PCF and (b) sensing head.

Fig. 2. Reflective spectra of sensors with different lengths of PCF.

Fig. 3. Schematic diagram of the sensing head.

Fig. 4. Simulated reflective spectrum of the interferometer.

Fig. 5. Simulated FFT results of spectral responses with different nLiq.

Fig. 6. Simulated relationship between the P and RI of the solution.

Fig. 7. Reflective spectra of two sensors with different L1 and L2.

Fig. 8. FFT results of spectral responses with different solution RIs.

Fig. 9. Comparison of ΔP caused by ΔRI and ΔT.

Fig. 10. Reflective spectra at different temperatures.

Fig. 11. Comparison of Δλdip caused by ΔRI and ΔT.