CO2 laser marker, CO2 laser is a gas laser, its generated wavelength is 10.6um, belonging to the middle infrared band. CO2 lasers have higher power and higher electro-optical conversion efficiency, which is currently a laser with greater power. The carbon dioxide laser fills the discharge tube with CO2 and other auxiliary gases. When a high voltage is applied to the electrodes, a glow discharge is generated in the discharge tube, which can cause the gas molecules to release laser energy. The released laser energy is amplified and can be used for laser processing.