Simulation of temperature distribution in skin under laser irradiation with different wavelengths

With the help of numerical calculations of the finite element method, we simulate the distributions of the temperature in skin after laser irradiation with four wavelengths, 532 nm, 694 nm, 755 nm, and 800 nm, respectively. Combined metabolism of the organism with the traditional Pennes equation, the induced thermal effect in tissue is expressed. The simulated results show that the temperature in the irradiation center decreases as the increase of the wavelength for the same irradiation duration, and the relationships of the distribution of temperature and the wavelength along the radial and longitudinal directions are different.