Find the right laser for your material & project
Diode, CO₂, fiber or UV? Answer three questions and see which laser types can actually do the job — including the ones that physically cannot, whatever the listing claims.
Find your match
Three questions. Answers update as you go.
CO₂ is your laser for marking wood / plywood.
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CO₂ is your laser for cutting wood / plywood at up to 3 mm.
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CO₂ is your laser for cutting wood / plywood at 3–6 mm.
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CO₂ is your laser for cutting wood / plywood at 6–12 mm.
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CO₂ is your laser for cutting wood / plywood at 12 mm +.
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CO₂ is your laser for marking clear acrylic.
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CO₂ is your laser for cutting clear acrylic at up to 3 mm.
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CO₂ is your laser for cutting clear acrylic at 3–6 mm.
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CO₂ is your laser for cutting clear acrylic at 6–12 mm.
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CO₂ is your laser for cutting clear acrylic at 12 mm +.
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CO₂ is your laser for marking colored acrylic.
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CO₂ is your laser for cutting colored acrylic at up to 3 mm.
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CO₂ is your laser for cutting colored acrylic at 3–6 mm.
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CO₂ is your laser for cutting colored acrylic at 6–12 mm.
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CO₂ is your laser for cutting colored acrylic at 12 mm +.
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CO₂ is your laser for marking leather.
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CO₂ is your laser for cutting leather at up to 3 mm.
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CO₂ is your laser for cutting leather at 3–6 mm.
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CO₂ is your laser for cutting leather at 6–12 mm.
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No desktop laser type does this job well.
CO₂ is your laser for marking fabric / felt / canvas.
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CO₂ is your laser for cutting fabric / felt / canvas at up to 3 mm.
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CO₂ is your laser for cutting fabric / felt / canvas at 3–6 mm.
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No desktop laser type does this job well.
No desktop laser type does this job well.
CO₂ is your laser for marking paper / cardstock.
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CO₂ is your laser for cutting paper / cardstock at up to 3 mm.
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CO₂ is your laser for cutting paper / cardstock at 3–6 mm.
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No desktop laser type does this job well.
No desktop laser type does this job well.
CO₂ is your laser for marking glass.
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No desktop laser cuts glass. Lasers etch the surface; the material fractures rather than parting cleanly. Showing marking results instead.
CO₂ is your laser for marking glass.
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Diode is your laser for marking slate / stone.
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Desktop lasers do not cut stone. They ablate the surface to leave a light mark. Showing marking results instead.
Diode is your laser for marking slate / stone.
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Fiber is your laser for marking anodized aluminum.
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Desktop lasers do not cut aluminum. They remove or alter the anodized layer on the surface. Showing marking results instead.
Fiber is your laser for marking anodized aluminum.
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Fiber is your laser for marking bare steel / stainless.
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Cutting sheet metal takes an industrial fiber system in the multi-kilowatt range, not a desktop machine. Desktop fiber machines mark metal. Showing marking results instead.
Fiber is your laser for marking bare steel / stainless.
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Fiber is your laser for marking powder-coated tumblers.
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You are removing a coating from the surface, not cutting metal. Showing marking results instead.
Fiber is your laser for marking powder-coated tumblers.
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UV is your laser for marking plastics (abs, pp, pet).
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Most engineering plastics melt rather than cut, and several release hazardous fumes. Check the never-laser list below before putting any plastic in a machine. Showing marking results instead.
UV is your laser for marking plastics (abs, pp, pet).
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Explore lasers by category
Most people arrive knowing what they want to make rather than which laser makes it. Every route below works backwards from the job.
The four laser types, side by side
Wavelength decides everything downstream. A material either absorbs a given wavelength or it does not, and no amount of wattage fixes a mismatch.
Eight machine categories run on four wavelengths. CO₂, RF CO₂ and industrial CO₂ all emit at 10.6 µm and cut the same materials — they differ in bed size, tube technology and speed. Fiber and MOPA both emit at 1064 nm; MOPA adds pulse control for color on stainless. A dual-source machine carries both a CO₂ and a fiber tube, so both rows below apply to it. Wavelength decides what you can cut; the category decides how much and how fast.
| Type | Cuts | Marks | Bare metal? | Clear acrylic? | Main limitation |
|---|---|---|---|---|---|
| Diode445–455 nm | Wood, plywood, leather, dark acrylic, thin card | Wood, leather, slate, anodized and coated metal | No — marking spray or oxidation only | No — the beam passes straight through | Slow on thick stock, charred edges, often sold open-frame |
| CO₂10.6 µm | Wood, all acrylic, leather, fabric, paper, rubber, foam | Glass, stone, coated metal, plus everything it cuts | No at desktop power | Yes — the flame-polished edge it is known for | The tube is a consumable; needs real venting and space |
| Fiber1064 nm | Not a cutter at desktop marking power | Steel, stainless, aluminum, brass, titanium; MOPA adds color on stainless | Yes — the only type that does | No | Marks rather than cuts; poor contrast on wood and organics |
| UV355 nm | Not a cutter | Plastics, glass, ceramic and coated surfaces at the finest detail | Marks it, though fiber is the better tool | Frosts rather than cuts | Highest cost per watt, smallest work area, no cutting |
Class 1 or Class 4: the spec most buyers miss
Two machines can carry identical wattage and pose completely different risks. The difference is whether the beam is enclosed, and it decides what you need in place to run one at home.
Class 1 — enclosed and interlocked
The laser inside may itself be Class 4, but the housing and interlocks mean no hazardous beam reaches you in normal use. No eyewear needed while the lid is shut. This is how most enclosed desktop CO₂ and fiber machines are rated.
Class 4 — open frame
Most bare-gantry diode engravers. The beam and its reflections are directly accessible. Rated eyewear is mandatory for everyone in the room, the work area needs controlling, and scattered reflection off shiny stock is a genuine hazard.
The detail that catches people out: an enclosed machine's Class 1 rating depends on the enclosure staying shut. Defeat the interlock or remove a panel — to align optics, feed long stock, or watch a cut — and it reverts to the class of the laser inside, typically 3B or 4, until everything is back in place.
In the US, laser products are regulated by the FDA's Center for Devices and Radiological Health under 21 CFR 1040.10 and 1040.11. FDA recognises four hazard classes, and labelling for Classes II–IV must carry a warning symbol stating the class and the output power. A machine with no class marking at all is a reason to ask the seller questions before ordering.
Materials never to put in a laser
These damage the machine, your lungs, or both — and a few are exactly what beginners reach for first.
- PVC and vinylReleases chlorine gas, toxic to breathe and corrosive to the machine's optics, rails and electronics.
- Faux leather and pleatherUsually PVC-backed. The same chlorine problem behind a friendlier name.
- Polycarbonate (Lexan)Absorbs badly, yellows, catches fire at the edge, and gives a ruined cut even when it works.
- ABSMelts rather than cuts and gives off cyanide compounds. Mark it with UV or fiber instead.
- HDPE and polystyrene foamMelt, stick to the bed, and readily catch fire.
- Chrome or mirrored surfacesReflect the beam back into the optics and can destroy the laser source.
- Fiberglass and carbon fiberThe resin binder produces toxic fumes and the fibers wreck the cut edge.
- Unknown coatingsIf you cannot confirm the surface layer, do not burn it. Ask the supplier for a data sheet.
Starting a business with it?
Bundles pair a machine with the accessories that job actually needs — the rotary, the filtration, the blanks. Cheaper than assembling the same kit piece by piece after the machine lands.
Resources to help you choose
The four questions that come up before every purchase in this category.
How this site works
This site covers CNC laser cutters and engravers that makers, sign shops, schools and small manufacturers buy and run themselves — from desktop diode machines through to industrial CO₂ systems. It does not cover multi-kilowatt fiber sheet-metal cutting systems, which are a different market with different economics and are usually sold by quote rather than off a shelf.
Some links on this site are affiliate links. If you buy through one, we earn a commission at no extra cost to you. It does not change what the matcher says — it will tell you when no laser can do the job you have in mind.
Capability information comes from manufacturer specifications and published material lists. Safety and regulatory information is linked to its source so you can check it. Where a figure varies by machine or conditions, it is given as a range and labelled as one. We have not personally tested every machine referenced here, and we do not claim to have.