Laser technology has several unique attributes that affect the quality of its cuts. The degree to which light curves around surfaces is known as diffraction, and most lasers have low diffraction rates to enable higher levels of light intensity over longer distances. In addition, features such as monochromaticity determine the laser beam’s wavelength frequency, while coherence measures the continuous state of the electromagnetic beam. These factors vary according to the type of laser used. The most common types of industrial laser cutting systems include:
Nd: YAG: The neodymium-doped yttrium aluminum garnet (Nd:YAG) laser uses a solid crystal substance to focus light onto its target. It can fire a continuous or rhythmic infrared beam that can be enhanced by secondary equipment, like optical pumping lamps or diodes. The Nd:YAG’s relatively divergent beam and high positional stability make it very efficient in low-powered operations, such as cutting sheet metal or trimming thin gauge steel.
CO2: Acarbon dioxide laser is a more powerful alternative to the Nd:YAG model and uses a gas medium instead of a crystal for focusing light. Its output-to-pumping ratio allows it to fire a high-powered continuous beam capable of efficiently cutting thick materials. As its name suggests, the laser’s gas discharge consists of a large portion of carbon dioxide mixed with smaller amounts of nitrogen, helium, and hydrogen. Due to its cutting strength, the CO2 laser is capable of shaping bulky steel plates up to 25 millimeters thick, as well as cutting or engraving thinner materials at lower power.
Post time: Jan-11-2019