Laser power is not enough to describe the size of the cutting ability, luminance (Brightness) is. Brightness is defined as "unit area per unit solid Angle of the laser power.

Comparing CO2 laser, disk laser and fiber laser, can draw the conclusion that until 5 kw, with the brightness of the optical fiber laser is the largest, fastest cut metal plate is the thickest optical fiber laser. But actually cutting plate is not equal to CO2 laser, although carbon steel 1.07 ytterbium doped fiber laser of near infrared absorption in multiples of 10.6 infrared CO2 laser, but 10 times in the optical fiber laser wavelength of CO2 laser cutting seam is much wider than those in the optical fiber (2 mm), oxygen blowing in easily. This is the CO2 laser for 46 years have been the cause of the monopoly of solid-state lasers in volleyball. First, the domestic production of laser cutting machine and the increase of independent development strength, the localization of foreign line companies in China production, narrow the gap between the gap of the two products and price. Users of MTK were constantly improve, the domestic market in 2010 accounted for 80%.