Introduction to Fiber Laser Marking Machine
Fiber lasers have become a hot topic in laser physics research in recent years, and they are widely recognized as a new generation of products that have the potential to replace solid-state lasers. Fiber lasers are lasers that use rare earth-doped glass fiber as the gain medium. Fiber lasers can be developed on the basis of fiber amplifiers: under the action of pump light, it is easy to form high power density in the fiber, resulting in the laser energy of the laser working material. Stage "number inversion", when a positive feedback loop (constituting a resonant cavity) is properly added, the laser oscillation output can be formed. Fiber laser marking machine use laser beams to permanently mark the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, or to "engrave" traces through the physical changes of the surface material caused by light energy, or to burn off part of the material through light energy to reveal the desired etching pattern. , text, barcodes and other graphics. The most significant advantage of fiber lasers is their extremely high pumping efficiency. In general, the pump conversion efficiency is 70%-75%, which is much higher than that of industrial diode-pumped solid-state lasers (dpssl). Such high conversion efficiency reduces the cooling and power requirements of the laser system, enables a more compact structure than conventional solid-state lasers, and the all-fiber structure provides a very robust and highly reliable package design.