Fig. 1. Schematic diagram of MOSF algorithm

Fig. 2. Variation trend of SINAD and THD of PGC-DCM, PGC-ARCTAN, and MOSF algorithms under different modulation depths. (a) SINAD; (b) THD

Fig. 3. Variation trend of SINAD and THD of PGC-DCM, PGC-ARCTAN, and MOSF algorithms under different phase delay. (a) SINAD; (b) THD

Fig. 4. Simulation phase delay demodulation error

Fig. 5. Schematic diagram of experimental environment construction

Fig. 6. Time domain diagrams of demodulation results of three algorithms. (a) PGC-ARCTAN algorithm; (b) PGC-DCM algorithm;(c) MOSF algorithm

Fig. 7. Spectrum diagrams of demodulation results of three algorithms. (a) MOSF algorithm; (b) PGC-ARCTAN algorithm; (c) PGC-DCM algorithm

Fig. 8. Variation of SINAD and THD of demodulation results of three algorithms with modulation depth. (a) SINAD; (b) THD

Fig. 9. Variation of SINAD and THD of demodulation results of three algorithms with phase delay. (a) SINAD; (b) THD

Fig. 10. Experimental phase delay error of demodulation signal

Fig. 11. Power spectral density (PSD) diagram of demodulation results of three algorithms. (a) MOSF algorithm; (b) PGC-ARCTAN algorithm; (c) PGC-DCM algorithm

Fig. 12. Demodulation result of MOSF algorithm in Michelson interferometer