But the CO2’s 10.6-micron wavelength is not ideal. Copper, brass cutting with a CO2 laser is rare, but some determined fabricators can accomplish it.Ĭutting aluminum with a CO2 laser is not uncommon at all. But when it comes to nonferrous materials there is a big problem – optical reflectivity. The CO2 laser beam has wavelength of 10.6 micron and for a very long time it was a great way to cut ferrous metals. The fiber laser is a great innovation in laser cutting, not just for its superior speed but for its wavelength.