1. It is the optimum absorption spectrum of Porphyrin vascular cells. Vascular cells absorb the high-energy laser of 980nm wavelength, solidification occurs and finally dissipated.
2. It is based on the thermal action of the laser. The transcutaneous irradiation (with a penetration of 1 to 2mm in the tissue) causes tissue selective absorption by hemeglobin (hemoglobin is the main target of the laser).