If you’re shopping for a laser engraving or cutting machine, you’ve probably run into two main technologies: fiber lasers and CO₂ lasers. Both can produce clean, precise results, but they work differently, excel with different materials, and come with different price tags. Here’s how they compare so you can figure out which one fits your business.
How They Work
A fiber laser generates its beam using a doped fiber optic cable as the gain medium, producing a shorter wavelength (around 1064nm) that is absorbed extremely well by metals. A CO₂ laser generates its beam by exciting a gas mixture (mostly carbon dioxide) inside a sealed or RF-excited tube, producing a longer wavelength (around 10,600nm) that is absorbed well by organic and non-metal materials.
What Materials Each Can Handle
Fiber lasers are built for metal. They mark and engrave stainless steel, aluminum, brass, titanium, coated metals, and most plastics very well, but they cannot effectively cut or engrave wood, leather, acrylic, glass, or paper.
CO₂ lasers are the more versatile choice for organic and non-metal materials. They cut and engrave wood, acrylic, leather, fabric, paper, cardboard, rubber, and glass beautifully. They can mark some metals with the help of a marking spray, but they are not a substitute for a fiber laser on bare metal.
Speed and Power
On metal, fiber lasers are dramatically faster than CO₂ lasers because the wavelength is so efficiently absorbed. A fiber laser can mark stainless steel in a fraction of the time a CO₂ laser would need, if a CO₂ laser could do it at all. On wood, acrylic, and other organic materials, CO₂ lasers are the faster and cleaner option, with less charring at higher speeds.
Cost to Buy and Run
Fiber laser sources have no consumable gas and a much longer rated lifespan, so running costs are lower over time, though the upfront cost of the laser source itself is typically higher than an equivalent-power CO₂ tube. CO₂ laser tubes are generally less expensive upfront, but glass tubes have a limited lifespan and will eventually need to be replaced, and RF-excited tubes cost more but last longer.
Which One Should You Choose?
If your business is built around metal, like firearm parts, jewelry, tools, or branded metal goods, a fiber laser is the right tool. If you’re working primarily with wood, acrylic, leather, or other organic materials, like awards, signage, or custom gifts, a CO₂ laser will serve you better. Many shops that serve a wide range of customers eventually run both.
Not sure which laser fits your business? Reach out to our team and we’ll help you figure out the right setup for the materials and volume you’re working with.