Fig. 1. Schematic of distance measurement system by femtosecond optical frequency comb

Fig. 2. Actual layout of distance comparison experiment based on femtosecond optical frequency comb

Fig. 3. Measurement results on oscilloscope

Fig. 4. Data processing. (a) Coherence pattern of initial points; (b) peak extraction and envelope fitting of initial points; (a) coherence pattern of target points; (b) peak extraction and envelope fitting of target points

Fig. 5. Measurement results and errors. (a) Measurement results; (b) measurement errors

Fig. 6. Variance of ambient factors during measurement

Fig. 7. Measurement results and errors of environmental factors after correction. (a) Measurement results; (b) measurement errors

Fig. 8. Measurement results and errors after optimization. (a) Measurement results; (b) measurement errors

Fig. 9. Final measurement results