Fiber lasers are divided into single-mode and multi-mode modular components. In cutting applications, the focused spot has a great impact on the quality of the cut out, single-mode lasers have a finer fiber core and better beam quality than multi-mode, with a Gaussian energy distribution, the highest energy density in the middle, and a sharp rounded peak-like three-dimensional diagram.
The fiber core of multimode laser is thicker, the beam quality is worse than single mode, the energy distribution is more average than single mode spot, the 3D image is an upside down cup, from the edge steepness, multimode is much steeper than single mode.
Comparison of 1.5KW single-mode and 1.5KW multi-mode lasers of the same power
1mm thin plate cutting speed single mode is 20% higher than multi-mode, the visual effect is about the same, but from 2mm onwards, the speed advantage gradually decreases, from 3mm onwards, both speed and effect, the advantage of high power multi-mode laser speed and effect is very obvious to show.
So the advantage of single-mode in the thin plate, multi-mode advantage in the thick plate, single-mode and multi-mode is not the value of mutual comparison, are a fiber laser configuration, just like a car, cars for highway, off-road for mountain, but cars can also run mountain, off-road can also run highway, so the fiber laser in the end to choose multi-mode or single-mode depends on the actual end customer processing needs.
Single-mode and multi-mode, how to choose?
From the power level distinction, the laser within 1000W because of its own energy is not high, the main processing material thickness is inclined to thin plate, so the laser within 1KW with single-mode configuration is more in line with the actual market situation, 1KW above the power of the laser to thin and thick. From the whole processing industry, processing quality improvement is a rigid demand, can not be compromised, so many high power laser selection will not consider single mode, must ensure that the processing quality for the first!
At the same time, the single-mode fiber core is generally thin, which means that the same power of the laser in which the transmission, single-mode fiber core of the light energy bearing greater, a test of the material. At the same time, when cutting highly reflective materials, high-intensity reflected light and shot laser superimposed if the fiber material tolerance will be very easy to "burn the core", while the core material life is also a challenge!
