Brief analysis of the types and applications of lasers

The laser is known as "the most accurate ruler", "the fastest knife", and "the brightest light". It is one of the four great inventions of the 20th century, which are called together with computer technology, atomic energy technology, and semiconductor technology. At present, lasers are widely used in all walks of life due to their extremely advantageous characteristics, including sheet metal cutting, industrial manufacturing, food and medical, aerospace and so on. With the vigorous development of the high-tech manufacturing industry represented by new energy vehicles, laser technology has obtained a broader space for development.

Currently, fiber lasers play an extremely critical role in industrial processing, especially in high-power laser processing. Different types of lasers have different characteristics, so their applicability is different in different industries. So let's distinguish the types and applications of lasers.

According to the working substance, lasers can be divided into gas lasers, including CO2 lasers, He-Ne lasers, etc.; liquid lasers with liquid dyes as the pump source; solid-state lasers, Nd: YAG, Nd: YVO4, Yb: YLP, etc. ; Semiconductor lasers and so on. According to the working mode, it can be divided into continuous laser and pulsed laser. From the basic working principle, all kinds of lasers are similar, including three parts: pump source, optical resonator and gain medium.

In laser marking, commonly used lasers include YAG lamp pumped solid-state lasers, side-pumped solid-state lasers, end-pumped solid-state lasers, fiber lasers, and CO2 lasers. As far as marking processing is concerned, since the processing depth and intensity are not very high, many lasers are capable of this aspect. The difference between side pump and end pump is mainly in the pump direction.

The CO2 laser is a gas laser with a wavelength of 10.6 microns in the far-infrared light band, using CO2 gas as the pumping medium. Coupled with high voltage, self-excited conduction occurs in the rare gas, and the gas molecules release laser light.

Laser technology is widely used in industry, but it makes people feel that it is a little far away from our lives. In our daily life, in fact, the shadow of laser processing can be seen in many places. For example, when buying goods, many of the labels and accessories on clothing are processed by laser. The common CD/DVD in the past, the laser printer and the laser anti-counterfeiting mark that are often used in work, when paying for shopping Bar code scanners used by shop assistants, etc.

In fact, the types of lasers are far more than those mentioned above, and with the continuous development of technology, laser technology is constantly penetrating into more fields, bringing more changes to our lives.