Fig. 1. Schematic diagram of the laser pulse transmission in WFBG array

Fig. 2. Timing diagram of pulses reflected by 3-WFBG array

Fig. 3. Optical path diagram of Michelson matching interferometer demodulation system with polarization compensation

Fig. 4. Timing diagram of pulses reflected by 2-WFBG array with polarization monitoring

Fig. 5. Simulation results of NPS and PNPS algorithms for randomly varying interference signal in θ∈[0,π/2]

Fig. 6. Simulation results of NPS and PNPS algorithms forrandomly varying interference signal in θ∈[0,π]

Fig. 7. Simulation results of PNPS algorithm for randomly changing interference signal