Fig. 1. Schematic of experimental principle

Fig. 2. Experimental setup

Fig. 3. Schematic of control signal

Fig. 4. Results of phantom experiment. (a) Cross section of raw OCT image; (b) cross section of modulation depth; (c) intensity curve corresponding to the dashed line in Fig. 4(a); (d) intensity curve corresponding to the dashed line in Fig. 4(b)

Fig. 5. Results of biological experiment. (a) Cross section of raw OCT image of mouse ear; (b) cross section of modulation depth of mouse ear; (c) three-dimensional vascular figure of mouse ear; (d) intensity curve corresponding to black solid line in Fig. 5(c); (e) intensity curve corresponding to green solid line in Fig. 5(c)