Mini Laser Engraving Machine For Metal
The frequency of an ordinary light is very messy, and it contains many wavelengths. Coherent light is characterized by concentrated light energy, small divergence angles, and approximately parallel light. After the invention of the ruby laser, various Mini Laser Engraving Machine For Metals were successively born: there are gas lasers, such as helium-neon lasers; there are solid-state lasers, such as YAG iridium aluminum garnet lasers; there are chemical lasers; dye lasers, etc. Among them, the semiconductor laser is most suitable as a light source for optical fiber communication. It has a small size and high efficiency, and its wavelength is suitable for the low loss window of the optical fiber. The light emitted by the semiconductor laser engraver has a very pure spectral line, concentrated energy, and a very thin beam, which can be efficiently emitted into a single-mode fiber with a core diameter of only 8 microns. Today's high-speed fiber-optic communication systems use semiconductor lasers as the light source.
However, the manufacturing process of semiconductor lasers is very complicated, and it is necessary to epitaxially grow 5 layers of doped semiconductors on a substrate of extremely high purity and no defects, and then photolithography of a micron-sized optical waveguide thereon. Nothing less than that. At the end of the 1970s, a long-life semiconductor laser with continuous operation at room temperature was finally made. In 1976, the world's first practical optical fiber communication line was established from Atlanta to Washington in the United States. At this time, the semiconductor Mini Laser Engraving Machine For Metal has not yet passed the stage, and the light source is a semiconductor light emitting tube. In the early 1980s, single-mode fibers and lasers have matured, and the advantages of large-capacity fiber-optic communications have been gradually exerted since then.