Fiber laser or CO2 laser? It’s the question every shop in Toronto, Mississauga, and Brampton asks at some point — usually when their old CO2 starts struggling or a new project demands faster metal cutting. The short answer is “it depends on your materials.” The longer answer involves cost, maintenance, ROI, and speed. Let’s break it down.
🔬 Quick Answer: Fiber laser wins for almost all metal cutting — faster, cheaper to run, and longer source life. CO2 still wins for wood, acrylic, leather, and fabric. If you cut 90%+ metal, switch to fiber. If you cut mixed materials, keep both.
Round 1 — Cutting Speed
On metal up to 12 mm, fiber wins by a country mile. A 6 kW fiber laser cuts 3 mm mild steel at 25-30 m/min — a 4 kW CO2 cuts the same material at 8-10 m/min. On thicker plate (20+ mm), the gap narrows but fiber still leads. Winner: Fiber.
Round 2 — Material Range
Fiber: mild steel, stainless, aluminum, brass, copper, titanium, galvanized. CO2: same metals (with assist gas) plus wood, MDF, acrylic, leather, paper, fabric. Winner: CO2 for material variety.
Round 3 — Running Cost
Fiber laser uses 30-50% less electricity, no laser gas, and far fewer consumables. Over a year of two-shift production, fiber typically saves $12,000-$20,000 in electricity and gas alone vs an equivalent CO2. Winner: Fiber by a wide margin.
Round 4 — Maintenance
Fiber has no resonator mirrors, no gas regulation, and no flow systems on the source. Most service is at the cutting head. CO2 needs mirror cleaning, beam alignment, gas regulation, and tube replacement every 4-7 years. Winner: Fiber. Read our fiber laser service guide.
Round 5 — Capital Cost
Fiber lasers used to be expensive. Today, a 3 kW fiber starts around $180,000 CAD — roughly the same as an equivalent CO2 system. Higher-power fibers (6-15 kW) carry a premium but pay back through speed. Winner: Tied.
Round 6 — Source Life
Fiber sources from IPG, Raycus, and Max are rated for 100,000 hours of pump diode life — essentially the life of the machine. CO2 tubes need replacement every 20,000-40,000 hours. Winner: Fiber.
When CO2 Still Wins
If 30%+ of your work is wood, acrylic, leather, fabric, or other non-metals — CO2 is still the right tool. Many shops in the GTA keep their CO2 for sign work, display fabrication, and prototyping while running a fiber for production metal cutting.
Related Reading
- Fiber Laser Service: Maintenance & Power Recovery
- Laser Head Repair in Mississauga & Brampton
- How to Choose a CNC Cutting Machine
- CNC Preventative Maintenance Checklist
Frequently Asked Questions
Fiber laser is significantly faster on metal up to 12 mm – typically 3 to 5 times the speed of CO2 on the same material. CO2 still has the edge on thick acrylic and certain non-metals where the longer wavelength absorbs better.
Fiber laser, by a wide margin. Fiber consumes 30-50% less electricity, has no laser gas to refill, and typically needs 60% less maintenance than an equivalent CO2. The total cost of ownership over 5 years usually favors fiber.
No – fiber wavelength does not absorb well into most non-metals and can damage organic materials. For wood, MDF, acrylic, leather, and fabric, CO2 is still the right tool. Many GTA shops run both.
Modern IPG, Raycus, and Max sources are rated 100,000 hours of pumping diode life – essentially the lifetime of the machine. CO2 laser tubes typically last 20,000-40,000 hours and need replacement.
Fiber laser. Wavelength absorption into reflective metals is much higher with fiber, and modern fiber sources cut copper and brass that CO2 systems struggle with.
If your CO2 is under 8 years old, well-maintained, and you cut a mix of metals and non-metals, keep it. If you cut mostly metal, run two shifts, or your tube is failing, the ROI on switching to fiber typically pays back in 18-30 months.