In late 2025, both CO2 and diode laser engravers excel at wood projects, but they differ significantly in performance, quality, and use cases. CO2 lasers (typically 40–150W) use a gas tube to produce a 10.6µm infrared beam, while diode lasers (5–40W+) rely on semiconductor diodes emitting blue light (~450nm).

For pure wood engraving—detailed designs, photos, signs, or crafts—CO2 lasers deliver superior results overall. They produce cleaner burns, sharper details, and less charring due to better absorption and vaporization rather than combustion. However, high-power diodes have closed the gap for hobbyists, offering excellent engraving at a fraction of the cost.

Key Comparison for Wood Engraving

Engraving Quality on Wood

CO2 lasers create high-contrast, professional engravings with crisp edges and minimal residue.

Modern diode lasers (20–40W) produce impressive detailed photo engravings and deep burns, though often with more visible charring.

Cutting Edges

CO2 cuts yield smooth, polished edges with minimal burn marks (especially with air assist).

Diode cuts often show darker charred edges, requiring sanding or masking tape for cleaner results.

Machine Examples

Typical CO2 engraver (enclosed, powerful tube).

Compact diode engraver (frame or enclosed).

Final Verdict

• Truly Best for Wood Engraving: CO2—for the cleanest, most professional results, especially if you cut thick wood or need pristine edges.
• Best Value/Alternative: High-power diode (e.g., 40W enclosed like xTool S1)—amazing engraving quality for hobbyists and small businesses on a budget.

If your projects are mostly engraving (not heavy cutting), a modern diode can rival CO2 for 80–90% of tasks at lower cost. Always prioritize safety: enclosures, ventilation, and goggles. Check current models like xTool P2 (CO2) or S1 (diode) for the latest advancements!