Fig. 1. Optical path diagram of micro-displacement measurement system for fiber Mach-Zehnder interference

Fig. 2. Principle of correlation phase identification

Fig. 3. Method to judge relationship between lead and lag of two signals

Fig. 4. Experimental setup of micro-displacement measurement system for fiber Mach-Zehnder interference

Fig. 5. Displacement drift curve due to AOM frequency drift

Fig. 6. Relation curve between standard displacement and measurement displacement

Fig. 7. Measurement error curve of repeated measurement experiment