If you want to understand the laser processing technology, you must know the importance of the laser. The laser is the core component of the laser processing equipment and has an irreplaceable role. The quality of the laser is the key factor determining the quality of the laser equipment. It must not be ignored. If you want to understand the laser processing technology, you must know the importance of the laser. The laser is the core component of the laser processing equipment and has an irreplaceable role. The quality of the laser is the key factor determining the quality of the laser equipment. It must not be ignored. With the continuous development of laser processing industry technology, laser technology is constantly being developed, and many new lasers have emerged. Early laser lasers were mainly high-power CO2 gas lasers and lamp-pumped solid YAG lasers. From the development history of laser processing industry technology, the first laser appeared in the 1970s as a sealed CO2 laser tube. Up to now, the fifth generation CO2 laser, the diffusion cooled CO2 laser, has appeared. From the development data, it can be easily analyzed that the early CO2 lasers tend to increase the direction of laser power, but when the laser power reaches a certain requirement, the beam quality of the laser is taken seriously, and the development of the laser is transferred to the improved beam quality. The diffused-cooled strip CO2 laser that appears close to the diffraction limit has better beam quality and has been widely used since its introduction. Especially in the field of laser marking, it is favored by many companies. According to the working medium, there are currently four types of lasers on the market; gas lasers, solid-state lasers, semiconductor lasers, and dye lasers. 1. Gas laser A gas laser uses a gas or vapor as a working substance to generate a laser. It consists of three main parts: the activation gas in the discharge tube, the resonant cavity composed of a pair of mirrors, and the excitation source (Fig. 1). The main incentives are electric excitation, pneumatic excitation, optical excitation and chemical excitation. Among them, the electric excitation method is the most commonly used. Under appropriate discharge conditions, the gas particles are selectively excited to a certain high energy level by electron collision excitation, energy transfer excitation, etc., thereby forming a population inversion with a certain low energy level, and generating a stimulated emission transition. 2. Solid-state laser A laser using a solid laser material as a working substance (see laser). In 1960, the ruby ​​laser invented by TH Mehman was a solid-state laser and the world's first laser. A solid-state laser generally consists of a laser working substance, an excitation source, a concentrating cavity, a cavity mirror, and a power supply. 3. Semiconductor lasers Semiconductor lasers are lasers that use semiconductor materials as working substances. Due to differences in material structure, the specific processes for generating lasers of different types are special. Commonly used working substances are gallium arsenide (GaAs), cadmium sulfide (CdS), indium phosphide (InP), and zinc sulfide (ZnS). The excitation methods are three forms: electric injection, electron beam excitation and optical pumping. Semiconductor laser devices can be classified into homojunction, single heterojunction, and double heterojunction. Homogeneous junction lasers and single heterojunction lasers are mostly pulsed devices at room temperature, while double heterojunction lasers can operate continuously at room temperature. 4. Dye Laser The working substance is an organic dye whose energy level consists of singlet (S) and triplet (T). S and T are split into a number of vibration-rotation states, which are also significantly broadened in solution, thus emitting a wide range of fluorescence. Generally, the dye laser has a simple structure, low cost, and relatively high output power and conversion efficiency. The structure of the ring dye laser is relatively complicated, but the performance is superior, and a stable single longitudinal mode laser can be output. The dye laser has a tuning range of 0.3 to 1.2 microns and is the most widely used tunable laser. 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For more information on the laser industry, please pay attention to Guangzhou Delan Laser - the laser industry expert around you
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Guangzhou Delan Laser Technology Co., Ltd.: professional manufacturing and production of laser inkjet printer, carbon dioxide laser marking machine, semiconductor laser marking machine, fiber laser marking machine, laser coding machine, contact Zhao Sheng, 020-66230280 UV laser Marking machine, Shantou laser marking machine, Guangzhou laser marking machine, Guangzhou CO2 laser marking machine, Guangdong semiconductor laser marking machine, Changsha laser marking machine, metal cutting machine, non-metal cutting machine
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