And yes, the F1 Ultra is a true fiber laser. The F1 Ultra uses an IR (infrared laser) as its laser source, while the fiber (diode-pumped fiber laser) serves as the gain medium. Both are essential components for generating laser light.
Each laser light is produced when the laser source strikes the gain medium, which then amplifies the intensity of the laser beam. Unlike the S1 & F1 models and other common IR lasers on the market that use DPSS (diode-pumped solid-state laser) as the gain medium, the F1 Ultra leverages a fiber gain medium to maximize laser power. This results in deeper engraving and cutting at the same power level.