How to choose and distinguish single mode & multi model laser source

The excellent characteristics of fiber lasers make more and more end customers pay attention to and consider replacing the original processing methods with fiber laser solutions in metal processing. With the localization of high-power fiber lasers, the cost of various core devices has been greatly reduced. So the selection threshold of high-power lasers has begun to disappear.

Single-mode and multi-mode beam quality comparison

In the cutting application, the focused spot has a great influence on the quality of the cut. The core of the single-mode laser is relatively thin and the beam quality is better than multimode. The energy distribution is Gaussian andthe intermediate energy density is the highest and the three-dimensional map is a sharp circle like the shape of the mountain.

 

The core of a multimode laser is coarser than that of a single mode. The energy distribution is smaller than that of a single mode. The three-dimensional image is an average of a single-mode spot. The three-dimensional image is an inverted cup. From the edge steepness, the multimode ratio is steep, comparing to the single mode.

 

Comparison of 1.5KW single mode and 1.5KW multimode laser with the same power

1mm thin plate cutting speed single mode is 20% higher than multimode. And the visual effect is similar. But from 2mm, the speed advantage is gradually reduced. Starting from 3mm, the speed and effect of high power multimode laser are very obvious. Shown below:

Single mode                                                    multi-mode

 

Therefore, the advantage of single mode is thin plate and the advantage of multimode is thick plate. Single mode and multimode are not worth comparing each other. They are all a configuration of fiber laser. Just like a car, the car is suitable for highway. And the off-road is suitable for mountainous. However, the car can also run on the mountain, and the off-road can also run on the road. Therefore, in the end, the choice of multi-mode or single-mode fiber laser depends on the processing needs of the actual end customer.

 More information of high power fiber laser source will come soon..

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