Fig. 1. Flow chart of spectral calibration based on the interference signal with a fixed OPD

Fig. 2. Schematic of SSOCT system

Fig. 3. A-line signals for different OPD values before and after calibration.(a) OPD is 0.5 mm; (b) OPD is 1.0 mm; (c) OPD is 2.0 mm; (d) OPD is 3.0 mm

Fig. 4. A-line calibration results with the source clock and the proposed method for different OPD values. (a) OPD is 0.5 mm; (b) OPD is 1.0 mm; (c) OPD is 2.0 mm; (d) OPD is 3.0 mm

Fig. 5. Comparison of axial resolution with different methods