Key Takeaways

• Fibre lasers have replaced CO₂ as the industry standard for metal cutting due to efficiency and speed.
• CO₂ lasers remain superior for non-metals: wood, acrylic, fabric, leather, and MDF.
• Fibre lasers use less electricity and have virtually no consumable optics to replace.
• Ferracut uses fibre laser technology for all metal cutting.
• Wavelength is the key difference: fibre at 1.07μm is absorbed by metals; CO₂ at 10.6μm is absorbed by organics.

Fibre Laser vs CO2 Laser: What's the Difference?

When you order laser cutting services in Australia, your parts will be cut on either a fibre laser or a CO₂ laser. For most metal cutting applications, the difference matters significantly. This guide explains the technology, practical differences, and when each type is used.

How They Generate the Beam

Fibre Laser

A fibre laser generates its beam by passing laser diode light through an optical fibre doped with rare-earth elements (typically ytterbium). The fibre itself is the gain medium. The output wavelength is approximately 1.07 micrometres. The beam is delivered through a flexible fibre optic cable directly to the cutting head.

CO2 Laser

A CO₂ laser generates its beam by exciting a gas mixture of carbon dioxide, nitrogen, and helium with an electrical discharge. The output wavelength is approximately 10.6 micrometres. The beam is delivered via a series of mirrors and lenses to the cutting head.

Why Wavelength Matters

The wavelength determines which materials absorb the laser energy efficiently. Metals (particularly polished aluminium and copper) reflect the longer 10.6μm wavelength of CO₂ lasers poorly, making cutting slow and inefficient. The shorter 1.07μm wavelength of fibre lasers is absorbed much more readily by metals — making fibre lasers 2–3× faster than CO₂ on thin steel and far more capable on reflective metals like copper and brass.

Conversely, organic materials (wood, acrylic, MDF, fabric) absorb the 10.6μm CO₂ wavelength very efficiently, and poorly absorb fibre wavelengths. This is why CO₂ dominates in woodworking, signmaking with acrylic, and crafting applications.

Efficiency and Running Costs

Fibre lasers convert approximately 30–35% of electrical input into laser output. CO₂ lasers convert only about 10–15%. This means fibre lasers use less than half the electricity for equivalent laser power — a significant operating cost advantage for commercial cutting operations.

CO₂ lasers also require periodic replacement of mirrors, lenses, and laser gas, with associated maintenance downtime. Fibre lasers have no laser gas, and the fibre gain medium has a lifespan of over 100,000 hours with no replacement required.

Performance on Metal

For cutting mild steel, stainless steel, and aluminium up to about 12–15mm, modern fibre lasers are substantially faster than equivalent-power CO₂ systems. At higher thicknesses, both technologies achieve similar results. For highly reflective metals (copper, brass), fibre laser is the only practical option — CO₂ lasers risk catastrophic back-reflection damage when attempting these materials.

What Ferracut Uses

All metal cutting at Ferracut is performed on fibre laser systems. This means faster cutting speeds, cleaner edges on aluminium and stainless, and the ability to cut reflective materials that CO₂ cannot handle.

Get an Instant Quote

Upload your DXF or DWG to the Ferracut instant quote tool for instant pricing on fibre laser cut parts.

Further Watching

• Laser Everything — Fibre and CO₂ laser cutting — settings, materials, and techniques
• Make or Break Shop — Hands-on laser cutting tutorials and real-world material tests

Get Your Parts Cut Today

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