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Differences in fiber laser cutting
Jan 10,2022
As the name suggests, CO₂ lasers use a gas mixture based on carbon dioxide. This gas is typically a mixture of carbon dioxide, nitrogen, and helium, and a laser beam is generated through electrical excitation. Solid-state lasers are divided into fiber lasers or disk lasers, with a power range similar to CO₂ lasers. As with CO₂ lasers, the eponymous component describes the laser's active medium, which in this case is a solid glass or crystal in the form of a fiber or disk.
In CO₂ lasers, the laser beam is guided through an optical path by optical components, whereas for fiber lasers, the beam is generated within the active fiber and guided to the machine's cutting head via a conductive fiber. Besides the difference in laser medium, another most important distinction is the wavelength: fiber lasers have a wavelength of 1µm, while CO₂ lasers have a wavelength of 10µm. The shorter wavelength of fiber lasers results in higher absorption when cutting steel, stainless steel, and aluminum. Better absorption means less heating of the processed material, which is a great advantage.
CO₂ technology is widely applicable to processing different types of materials and various sheet thicknesses. Fiber laser cutting equipment is suitable for processing thin to thick steel, stainless steel, aluminum, and non-ferrous metals (copper and brass).
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