How to Select and Distinguish Single-mode and Multimode Laser Sources

The excellent characteristics of fiber laser make more and more end-users pay attention to and consider replacing the original processing method with the solution of fiber laser in metal processing. With the positioning of high power fiber lase. The cost of various core devices is greatly reduced. Therefore, the selective threshold of high power lasers has begun to disappear. How to Select and Distinguish Single-mode and Multimode Laser Sources?

Quality comparison of single-mode and multi-mode beams

Focus has a great influence on cutting quality in cutting applications. The core of single-mode laser is relatively thin, and the beam quality is better than that of multi-mode laser. The energy distribution is Gauss distribution, with the highest energy density in the middle. The three-dimensional map is a sharp circle like the shape of a mountain.

The core of multimode laser is rougher than that of single mode laser. The energy distribution is smaller than that of a single mode. The three-dimensional image is the average value of single-mode points. The three-dimensional image is inverted cup. From the angle of edge steepness, the multimode ratio is steep compared with single mode.

Comparison of the same power of 1.5KW single-mode and 1.5KW multimode lasers

The cutting speed of 1 mm thin plate is 20% higher in single mode than in multi-mode. The visual effect is similar. But starting from 2mm, the speed advantage gradually decreases. Starting from 3mm, the speed and effect of high power multimode laser are very obvious. As follows:

Single mode multimode

Therefore, the advantage of single mode is thin plate, and the advantage of multi-mode is thick plate. Single-mode and multi-mode are not worth comparing. They are all configurations of fiber lasers. Like a car, it fits the highway. Cross-country is suitable for mountain areas. However, cars can also travel on mountains, and cross-country can also travel on roads. Therefore, ultimately, the choice of multimode or single-mode fiber lasers depends on the processing needs of actual end-users.