Laser stands for Light Amplification by Stimulated Emission Radiation. By energizing molecules in a crystal or gaseous compound, the molecules are stimulated to emit light at a certain wavelength. This produces the amplified light of laser. There are many kinds of lasers, each of which creates a certain tissue reaction. The carbon dioxide (CO2) laser is one of the most widely used medical laser in the world. The CO2 laser system delivers an intense infrared light beam with 10,600 nanometers wavelength. This specific wavelength has a dramatic effect to biological soft tissue.