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Metal Marking

Bare metal is a 1064nm club: fiber and MOPA sources mark stainless, brass, aluminum, and titanium natively, with MOPA’s pulse tuning adding anneal blacks and true color. IR modules are the 2W entry ticket.
For metal-marking work →Fiber picks →

The coated detour matters for sellers: anodized aluminum and powder-coated steel mark beautifully on an ordinary diode — most best-selling metal products never touch a fiber.

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ComMarker B4 Review: MOPA Fiber in Four Wattages

The ComMarker B4 is a MOPA fiber laser sold in four wattages, marking bare metal and annealing color on stainless. A class-based review of what MOPA buys you, which wattage to pick, and the fiber-class trade-offs.

Mara Vance· Jul 19, 2026· 6 min

ComMarker B4 Review: MOPA Fiber in Four Wattages
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