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What is the difference between YLS multimode and YLR single mode laser transmitter?

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  • 3 min read

What is the difference between IPG laser transmitter YLS multimode and YLR single mode?

According to the different transmission point modulus, optical fiber can be divided into single-mode optical fiber and multi-mode optical fiber. The so-called “mode” refers to a beam of light entering the optical fiber at a certain angular velocity. Single-mode fibers use solid-state lasers as light sources, and multi-mode fibers use light-emitting diodes as light sources.
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, the beam quality is better than that of the multi-mode, the energy distribution is Gaussian, the middle energy density is the highest, and the three-dimensional image is a sharp circle Mountain-shaped.
The core of a multimode laser is thicker than that of a single-mode laser, and the beam quality is worse than that of a single-mode laser. The energy distribution is more average than that of a single-mode laser. A three-dimensional image is an inverted cup. Single mode is much steeper.

The cutting speed of single-mode 1mm sheet is 20% higher than that of multi-mode, but starting from 2mm, the speed advantage gradually decreases. Starting from 3mm, the advantages of high-power multi-mode lasers are very obvious in terms of speed and effect.
Therefore, the advantage of single-mode lies in thin plates, and the advantage of multi-mode lies in thick plates. Single-mode and multi-mode have no value for comparison. They are both a configuration of fiber lasers, just like a car. A car is suitable for roads and off-road is suitable for mountains. , But cars can also run on mountains and off-road can also run on roads, so whether fiber lasers choose multi-mode or single-mode depends on the actual end customer’s processing needs.
Single-mode fiber cores are generally thinner, which means that lasers of the same power are transmitted in them, and single-mode fiber cores carry greater light energy, which is a test for materials. When cutting high-reflection materials, the high-intensity reflected light and the emitted laser are superimposed. If the tolerance of the fiber material is insufficient, it will be very easy to “burn the core”, and it is also a challenge to the life of the core material.
From the perspective of power level distinction, lasers within 1000W have low energy, and the main processing material thickness is biased towards thin plates. Therefore, the single-mode configuration of lasers within 1KW is more in line with the actual market conditions. From the perspective of the entire processing industry, the improvement of processing quality is a rigid requirement. Lasers with power above 1KW must be thin and thick and cannot be compromised. Therefore, many laser manufacturers still choose multi-mode configurations for the configuration of high-power fiber lasers.

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