Fig. 1. Diagram of theprocess of differential phase resolution. (a) Two-dimensional interference signal; (b) two-dimensional complex tomography signal; (c) phase difference of two-dimensional complex tomography signal; (d)temporal domain spectrum of complex tomography signal; (e) Doppler information

Fig. 2. Schematic ofsimulated interference signal

Fig. 3. Single A-Line signal of the interference signal in simulation

Fig. 4. Temporal frequencyspectrum of the interference signal with static sample in simulation

Fig. 5. Temporal frequency spectra of the interference signal with different moving amplitudes of moving sample in simulation. (a) 0.2 μm; (b) 4.5 μm

Fig. 6. Temporal frequency spectra of new complex tomography signal with different moving amplitudes of moving sample in simulation; (a) 0.2 μm; (b) 4.5 μm

Fig. 7. Full-range A-Line signals with moving sample in simulation. (a) With traditional technology; (b) with phase difference resolved technology

Fig. 8. Doppler phase shifts of moving sample. (a) b=2 μm, with phase difference resolved technology; (b) b=4.5 μm, with phase difference resolved technology; (c) b=0.2 μm, with traditional technology; (d) b=0.9 μm, with traditional technology

Fig. 9. Schematic of fiber complexfrequency domain Doppler OCT optical system

Fig. 10. Sample to be detected. (a) Physical picture of sample to be detected;(b) relation between amplitude of sinusoidal movement of sample and amplitude of sinusoidal signal

Fig. 11. A-Line signals of moving sample. (a) With mirror image; (b) traditional technology to overcome the mirror image; (c) using the phase difference resolved method to overcome the mirror image

Fig. 12. Doppler phase shift and the temporal frequency spectrum of sample in experiment. (a)Traditional technology with the Doppler phase; (b) phase difference resolved technology with the Doppler phase; (c) the temporal frequency spectrum of traditional technology; (d) temporal frequency spectrum of phase difference resolved technology

Fig. 13. Dopplerphase shifts and temporal frequency spectra of sample in experiment with phase difference resolved method. (a) Doppler phase shift with b=19.80 μm; (b) temporal frequency spectrum with b=19.80 μm; (c) Doppler phase shift with b=21.59 μm; (d) temporal frequency spectrum with b=21.59 μm