Fiber or CO₂ lasers —which technology is better suited for metal cutting? For decades, CO₂ lasers were the industry standard, but the development of fiber laser sources has meant that today, the vast majority of new investments in laser cutting machines are based on fiber technology.
Both technologies differ not only in their design, but above all in their productivity, operating costs, and production capabilities. In this article, we compare fiber and CO₂ lasers in terms of a plant’s actual needs—so that the choice of technology is based on a process analysis rather than solely on catalog specifications.
When should you choose a fiber laser, and when should you choose CO₂ technology?
CO₂ technology has not completely disappeared from the industry—it is still in use at many plants, especially those where the machines were installed many years ago. When it comes to new investments in metal cutting, however, the situation is different: fiber lasers are now the dominant solution, offering higher productivity, lower operating costs, greater energy efficiency, and significantly broader possibilities for production automation.
The choice between technologies should be based on an analysis of the production process—the type of materials being processed, typical steel plate thicknesses, and expected productivity—rather than on familiarity with a machine that worked well a decade ago.
How does a CO₂ laser work?
A CO₂ laser uses a mixture of gases as its active medium. The light beam is generated inside the gas resonator and is then directed to the cutting head via a system of mirrors.
For many years, this design was the standard solution in industrial metal cutting; however, it requires a complex optical system as well as regular maintenance and periodic adjustment of the components responsible for guiding the beam—which results in higher costs and more time spent on machine maintenance.
How does a fiber laser work?
A fiber laser uses a fiber-optic laser source in which energy is transmitted directly through the fiber to the cutting head. As a result, there is no need for a mirror system, and the design of the entire fiber laser cutter is simpler and more efficient.
Fiber-optic technology is characterized by high energy efficiency, high process stability, and the ability to use a wide range of laser source powers. A modern metal-cutting laser of this class is suitable for both the mass production of thin components and the processing of heavy plate.
Fiber vs. CO₂ — A Comparison of Technologies
| Criterion | Fiber laser | CO₂ laser |
|---|---|---|
| Active medium | fiber-optic source, fiber-guided beam | gas mixture, beam guided by a mirror system |
| Cutting productivity | higher speed, especially for thin and medium thicknesses | lower cutting speed across most thickness ranges |
| Energy efficiency | High — lower energy consumption per unit | lower than with fiber technology |
| Service and Maintenance | simpler design, fewer wear parts | a complex optical system requiring regular adjustment |
| Cutting quality and precision | High repeatability, precise contours, and small holes | Good edge quality in some applications involving heavy plates |
| Production Automation | Extensive integration capabilities with automation | limited integration capabilities in older designs |
| Current Applications | The standard for new investments in metal cutting | mainly machines installed previously, specialized applications |
This comparison is general in nature—actual differences depend on the material, thickness, machine configuration, and specific application.
Why have fiber lasers replaced CO₂ lasers?
For many years, the CO₂ laser was the standard in metal processing. However, the development of fiber laser sources has rendered most of its former advantages obsolete. Modern fiber laser cutters offer:
- a significantly higher cutting speed,
- greater energy efficiency,
- lower operating costs,
- lower maintenance requirements,
- a simpler design,
- easier integration with automation systems,
- the ability to work with modern, high-power sources.
For most manufacturing facilities, this translates to a lower cost per part and greater overall process productivity—and, as a result, a shorter payback period on the investment in a laser cutting machine. Additional savings can be achieved by cutting with compressed air instead of nitrogen—as demonstrated by the AirCut system.
Is the CO₂ laser still used today?
CO₂ lasers are still in use at many companies—though these are mostly machines installed many years ago or equipment used for specialized applications, including the processing of non-metallic materials.
When it comes to new investments in metal cutting, fiber laser cutting machines are by far the most popular choice—due to their higher productivity, lower operating costs, and greater potential for automation of the production process.
How do you choose the right cutting technology?
There is no single technology that is suitable for every facility. When selecting a laser cutter, the following factors, among others, should be taken into account:
- the type of parts produced,
- types of materials being processed,
- typical steel plate thicknesses,
- expected productivity of production,
- planned expansion of the plant,
- automation capabilities,
- total cost of owning and operating the machine.
Selecting the power of the laser source is the next step in this same decision-making process—we cover this topic in more detail in our guide on how to choose the power of a fiber laser.
How does STIGAL help you choose the right technology and machine configuration?
At STIGAL, the selection of a solution begins with an analysis of the customer’s production process, rather than solely on the basis of catalog specifications. We examine the type and thickness of the materials being processed, the expected productivity, production development plans, and automation capabilities, and then propose a fiber laser cutting machine configuration tailored to the facility’s actual needs.
Our machines are equipped with, among other things, an enclosed operator safety enclosure, and we also help each customer select the right CNC machine for metal cutting —from the laser source to automation to downstream production processes such as bending and welding.
The product lineup includes, among other things, compact laser cutters for steel plates, machines capable of cutting tubes, profiles, and structural sections on a single CNC machine, large-format solutions for large dimensions, and configurations with a 3D bevel cutting head that enables angled cutting and bevel cutting.
Summary — Fiber or CO₂?
Fiber laser technology has become the standard in modern metal cutting today. It combines high productivity, low operating costs, high precision, and easy process automation. CO₂ lasers are still in use at many facilities, but when it comes to new investments, fiber laser cutters have almost completely replaced them.
If you’re also trying to decide between laser and plasma, check out our guide , “Laser or Plasma—How to Choose the Right Technology?”
Not sure whether a fiber laser or a CO₂ laser is right for your production?
We will analyze your materials, thicknesses, and expected productivity, and then help you select the laser cutting technology and configuration that best meet your facility’s actual needs.
Frequently Asked Questions — Fiber Laser vs. CO₂ Laser
W przypadku cięcia metalu w zdecydowanej większości zastosowań przemysłowych tak. Laser fiber zapewnia wyższą wydajność, niższe zużycie energii, mniejsze wymagania serwisowe oraz niższe koszty eksploatacji, dlatego jest dziś standardem przy nowych inwestycjach.
Tak, jednak jego udział w rynku maszyn do cięcia metalu systematycznie maleje. Technologia CO₂ nadal znajduje zastosowanie przede wszystkim w wybranych procesach specjalistycznych oraz przy obróbce materiałów niemetalowych.
W większości zastosowań związanych z obróbką metalu laser fiber zapewnia bardzo wysoką jakość krawędzi, dużą powtarzalność oraz wysoką dokładność wykonania detali. Współczesne źródła o dużej mocy pozwalają również efektywnie obrabiać grubsze materiały.
Źródło światłowodowe charakteryzuje się znacznie wyższą sprawnością energetyczną niż laser CO₂. Dodatkowo wiązka jest prowadzona światłowodem, dzięki czemu nie ma potrzeby stosowania rozbudowanego układu luster wymagającego regularnej regulacji i konserwacji.
Jeżeli maszyna ma służyć przede wszystkim do cięcia metalu, w większości przypadków bardziej opłacalnym wyborem będzie nowoczesna wycinarka laserowa fiber. Decyzję warto jednak oprzeć na analizie rodzaju materiałów, grubości blach oraz planowanej wydajności produkcji.
Dobór maszyny powinien uwzględniać rodzaj obrabianych materiałów, typowe grubości blach, oczekiwaną wydajność, poziom automatyzacji oraz plany rozwoju zakładu. W STIGAL każda konfiguracja dobierana jest indywidualnie do procesu produkcyjnego klienta.
