Fiber vs. CO2 vs. Diode Laser: The Ultimate Guide - xTool
3) Fiber Laser. Fiber lasers are the most powerful and thus the most expensive of all types. These have revolutionized laser cutting and engraving. It is a very new technology compared to CO2 laser and diode laser. Fiber lasers also use a bank of diodes to create laser beams. We have already explained how laser beams are created in a laser diode.