Fig. 6

PAM with a five-wavelength SRS fiber laser source. (a): Schematic of the five-wavelength fiber laser and PAM; (b): Laser output spectrum; (c): Imaging result of oxygen saturation; (d): Blood flow speed determined using the dual-pulse method; (e): PAM imaging of the blood and lymphatic vessels; and (f): Variation of the oxygen saturation, blood flow speed, and relative lymphatic concentration from the root to the tip of a mouse ear. A: arteries; V: veins; L: lymphatic vessels [38]