Fig. 1. Structure of a typical fiber-optic FP sensor

Fig. 2. Flow chart of MMSE algorithm

Fig. 3. Reflected spectrum of fiber-optic FP sensor

Fig. 4. Amplitude normalization of the signal

Fig. 5. Demodulation simulation of the N-MMSE algorithm

Fig. 6. A white light interrogation system for the cavity length extraction of fiber-optic FP sensors

Fig. 7. Cavity length measurement with temperature increasing

Fig. 8. Measurement experiment of cavity length resolution