Fig. 1. Schematic diagram of measuring system

Fig. 2. Sensitivity of white light and laser secondary interference

Fig. 3. Sensitivity S₃ curves

Fig. 4. Experimental device diagram

Fig. 5. Original data of laser interference signal

Fig. 6. Original data of white light interference signal

Fig. 7. Curve fitting of laser secondary interference signal

Fig. 8. Curve fitting of white light interference signal

Fig. 9. Sensitivity curves of white light interference and laser secondary interference

Fig. 10. Sensitivity of homodyne interference system

Fig. 11. Noise analysis