Fiber lasers are a type of solid state laser that is rapidly growing within the metal cutting industry. Unlike , Fiber technology utilizes a solid gain medium, as opposed to a gas or liquid. The “seed laser” produces the laser beam and is then amplified within a glass fiber. With a wavelength of only 1064 nanometers fiber lasers produce an extremely small spot size (up to 100 times smaller compared to the ) making it ideal for cutting reflective metal material. This is one of the main advantages of Fiber compared to .