A novel self-indiced non-ablative three-dimensional fractional FRAC3 method for skun rejuvenation is described. The method utilizes short pulse duration/high peak power density of Nd:YAG Accelera mode laser pulses. The Accelera pulses produce a three-dimensional fractional pattern in the epidermis and dermis, with demage islands located predominatly at the sites of skin imperfections. Thermal measurements in-vivo of skin surface and in vitro of skin scross section following the illumination with Nd:YAG Accelera> pulses are presented. The measurements demonstrate the emergence of isolated “fractional” hot islands within the skin. Clinical experience following the short pulse Nd:YAG laser treatment is also presented. The FRAC3 technique offer practitioners another dimension in safety and self-regulating efficency of non-ablative laser skin rejuvenation.