Laser marking machines can be classified according to the type of laser used: CO2 laser marking machines, semiconductor laser marking machines, YAG laser marking machines, and fiber laser marking machines. They can also be classified according to laser visibility: ultraviolet laser marking machines (invisible), green laser marking machines (visible laser), and infrared laser marking machines (invisible laser).
Based on wavelength, laser marking machines can be classified according to laser wavelength: deep ultraviolet laser marking machines (266 nm), green laser marking machines (532 nm), lamp-pumped YAG laser marking machines (1064 nm), semiconductor side-pumped YAG laser marking machines, semiconductor end-pumped YAG laser marking machines (1064 nm), fiber laser marking machines (1064 nm), and CO2 laser marking machines (10.64 μm).
