It can be said that in just a few years, 10-15kW power combined beam multimode laser pointer have become the standard equipment of various fiber laser manufacturers. Although the application of multi-mode high-power lasers in the industrial field has become more and more extensive, the beam quality factor of most industrial multi-mode lasers on the market of the order of 6-10kW is M2≈ 10-11.
Out of the ordinary, Laser Co., Ltd. has launched high-brightness and high-power multi-mode fiber lasers in recent years, leading the development trend of multi-mode fiber lasers.
How to maintain a high beam quality under a certain beam combining efficiency is obviously very critical to the realization of such a high-brightness multimode laser. Theoretical research on its core component-laser power combiner shows that the output beam quality limit of the three-in-one power combiner is M2≈2.4, and the output beam quality limit of the seven-in-one power combiner is M2≈3.5.
However, it is difficult to achieve ideal power combining in practical applications. Most manufacturers tend to one-sided pursuit of power combining efficiency, while neglecting the control of beam quality. The successful launch of high-brightness multimode lasers with M2≤4 is not only due to the deep technical accumulation of the Dake technical team in power combining technology for many years, but also that they have upheld the following concepts for the core components and the design of the whole machine:
The laser beam combining scheme uses a three-in-one power beam combining method. The theoretical limit value of the beam M2 output by the three-in-one method is the smallest, and it can output better beam quality than other beam combination methods such as seven-in-one. The Dake Laser pure single-mode laser module is used for beam combination. The beam quality factor M2 of the pure single-mode laser module is less than 1.3, ensuring that the beam quality after beam combination is close to the theoretical limit;
Use craftsmanship to study every technical detail, such as achieving ideal optical fiber mode field matching, and ultra-low loss special-shaped optical fiber fusion. At present, single-mode fiber green laser pointer have obvious problems of insufficient power in deep penetration welding of thick plate materials and high-speed cutting and welding of special materials. If ordinary multi-mode lasers are used, the speed and quality of cutting and welding will be affected due to the large heat-affected area. .
As the leader of high-brightness anti-reflection fiber lasers, the launch of high-brightness multi-mode lasers fills this blank area. It is used in the cutting or deep penetration welding of various conventional thick plate materials, high-speed cutting and welding of special materials, and remote processing. Shows great advantages and good prospects.