Fiber laser technology has become a new star in laser industry and an emerging leader in sheet metal cutting field. Fiber laser technology works in the way that a fiber laser beam is focused highly on the surface of materials being cut, in which the laser beam of high energy density transforms into great heat with intensified temperature. Being exposed to such heated and focused laser beam, the surface of materials will melt or vaporize instantly, and meanwhile the gas will be blown into the surface of material to sweep off the residue of powder caused from melting materials.