A fiber laser printer is a specific type of laser marking system where the active gain medium is an optical fiber doped with rare-earth elements such as Ytterbium. This architecture results in a highly efficient, robust, and low-maintenance machine ideal for industrial marking, engraving, and etching applications. Fiber lasers are renowned for their excellent beam quality, which allows for extremely fine, high-contrast marks on a wide variety of materials, with a particular proficiency for metals (including steel, aluminum, brass, and titanium) and certain plastics. They operate primarily in the infrared wavelength (around 1064 nm) and are highly effective for processes like annealing, which creates a mark without removing material, and deep engraving. The key advantages of fiber laser technology include its electrical efficiency, long service life (often exceeding 100,000 hours), compact design, and minimal maintenance requirements due to the solid-state construction with no mirrors or gases to replace. This makes them exceptionally reliable for 24/7 production environments. In an industrial setting, a fiber laser printer is the go-to solution for applying permanent serial numbers, barcodes, and logos onto components in the automotive, aerospace, and tooling industries. When integrated into an extrusion line for metal or composite profiles, it can provide durable, high-speed part identification that remains legible even after painting, heat treatment, or exposure to corrosive agents. Their reliability, speed, and superior mark quality on metallic surfaces make fiber laser printers a dominant and cost-effective technology for permanent product identification and traceability.