Co2 Laser Engraving Machine
The simplest semiconductor laser structure. It consists of 5 layers of semiconductors, and the active layer in the middle is doped with active materials. After the current is injected on the two electrodes, the electrons in the atoms of the active material in the active layer are excited from a low energy state to a high energy state. These high-energy electrons emit light when they are reduced from a high-energy state to a low-energy state, which is called spontaneous radiation. Spontaneous light is not very pure, that is, it contains broad spectral lines. If the spontaneous radiation is strong, the light is reflected back and forth within the two mirrors of the semiconductor. In this process, for the light energy with the same phase, the energy overlaps and becomes larger and larger; for the light energy with the different phase, the energy weakens and becomes smaller and smaller. The energy of the CO2 Laser Engraving Machine is converted into light energy of a specific wavelength according to the cavity formed by the two mirror surfaces of the semiconductor, and when it oscillates, it forms a laser. Laser light is generated by so-called stimulated radiation. The semiconductor mirror is smooth and translucent, and the laser can be output from the mirror. The function of the confinement layer is to concentrate light energy in the active layer to improve efficiency. The wavelength of the laser light emitted by a semiconductor laser mainly depends on the semiconductor material and the distance of the mirror surface.