Fig. 1. Schematic of experimental device

Fig. 2. Schematic of wavelength fine tuning interface

Fig. 3. Phase jump in signal synthesis

Fig. 4. Laser frequency changed with time

Fig. 5. Frequency spectrogram of measurement signal after resample

Fig. 6. Normalized measurement signal

Fig. 7. Frequency spectrograms of joining directly and joining after normalization

Fig. 8. Frequency spectrogram of signal synthesis

Fig. 9. Error and standard deviation at different distance