In the field of laser processing, my country's laser processing technology has achieved very significant results, which has brought a very big opportunity for my country's laser deep processing field, and greatly improved the efficiency of cutting.
From the first CO2 laser in 1964 to the present, after nearly 40 years of development, from sealed-off CO2 lasers, slow axial flow CO2 lasers, cross flow CO2 lasers, to high-frequency Rhodes pumped fast axial flow, It can be seen in the development of the radio frequency turbo type fast axial flow and even the diffuse Slab CO2 laser that has emerged. On the one hand, the laser output power continues to improve and the volume continues to shrink. On the other hand, the efficiency of the laser continues to improve, and the beam quality is getting better and better. .
The light intensity distribution on the cross section of the diffused Slab CO2 laser beam is close to the Gaussian distribution, and it has excellent beam quality. The focus drift in the enlarged laser processing area is very small, which is very conducive to large-scale laser transmission and extraction. The cutting application of size workpieces is very important.
The laser system used in the manufacturing industry is the laser manufacturing system, which generally consists of a laser, a laser transmission system, a laser focusing system, a control system, a motion system, and a sensing and detection system. The core is a laser.
Laser as a heat source or light source (energy) is a "cutting tool" or "tool" in laser manufacturing. The quality of the "tool" or "tool" directly affects the results of processing and manufacturing. The quality of the laser beam can be expressed by the far-field divergence angle of the beam, the characteristic parameter value of the beam focus Kf and the diffraction limit multiplier M2 (M) or the beam transmission factor K value.
For low-power lasers, the working material is not messy on average, and the fundamental mode output can generally be achieved. Its beam cross-sectional energy distribution is Gaussian distribution, and it remains unchanged during the transmission process, and the beam quality is good; for high-power lasers, it is generally not easy to get The fundamental mode is output, and the output is often a multi-mode laser beam, and the quality of the laser beam is degraded.
At present, there are two types of high-power lasers commonly used in the industry: CO2 lasers and YAG lasers. High-power lasers have a wide range of industrial applications. Laser cutting machines and laser welding require excellent beam quality. The pursuit of high-power lasers with high beam quality is the goal of the continuous development of industrial lasers.
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