What Can You Do With a Fiber Laser Machine? Engrave, Cut and Weld

"Fiber laser" gets used as if it describes one type of machine. It doesn't. A 20W fiber laser engraver and a 2000W handheld laser welder both use fiber laser technology — but they're about as similar as a scalpel and a hacksaw. Same category of tool, completely different purpose and specification.

This article maps the full range of what fiber laser machines can do, explains why the three core functions (engraving, cutting, and welding) require such different power levels and hardware, and gives you the decision framework to choose the right machine for your application. If you're specifically investigating laser welding, our what is laser welding guide covers that process in depth.

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What Is a Fiber Laser Machine?

A fiber laser machine is any system that uses a fiber laser source — a laser where the gain medium is an optical fiber doped with rare-earth elements (typically ytterbium, at ~1070nm wavelength) — to process materials. The beam is generated within the fiber and delivered to the workpiece via a flexible fiber optic cable, rather than through the external mirror arrays used in CO2 systems.

How Fiber Laser Technology Works

Beam Generation, Wavelength (~1070nm) and Delivery

Ytterbium-doped optical fiber acts as both the gain medium and the beam delivery path. Pump diodes inject light into the fiber, the ytterbium ions absorb and amplify the energy, and a highly coherent, single-mode beam exits at approximately 1064–1070nm — near-infrared wavelength, invisible to the naked eye. This beam travels through the fiber cable to the processing head with very low energy loss.

The ~1070nm wavelength is particularly well-suited for metal processing because metals absorb near-infrared energy much more effectively than they absorb the 10,600nm wavelength of CO2 lasers. On bare steel, aluminum, copper, and stainless steel, fiber lasers deliver substantially more energy into the material for equivalent power output.

Fiber lasers also achieve very high wall-plug efficiency — typically 30–50% electrical-to-optical conversion, compared to around 10% for CO2 systems. This matters in practice as lower operating cost and less waste heat to manage.

Why Fiber Lasers Beat CO2 and Diode for Metal Work

CO2 lasers operate at a wavelength that metals absorb poorly — making them inefficient for metal cutting, unable to mark bare metal without coatings, and completely unsuitable for metal welding. They remain excellent for non-metal processing (wood, acrylic, leather, rubber) but are the wrong tool for most metal applications.

Diode lasers (the type in xTool, Sculpfun, Atomstack, and similar consumer engravers) are low-power, appropriate for wood, leather, and some surface marking on coated metals, but as discussed in our can a laser engraver weld metal guide, they lack the power density for any structural metal joining or efficient metal cutting.

For metal marking, cutting, cleaning, and welding, fiber laser is the correct technology. The question isn't whether to use fiber laser — it's which type.

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Types of Fiber Laser Machines Available

Galvo (Marking/Engraving), Gantry (Cutting) and Handheld (Welding)

The three main hardware architectures of fiber laser machines are defined by how they deliver and move the beam:

Galvo (galvanometer) systems use oscillating mirrors inside a stationary scan head to steer the beam across the work surface at very high speed — thousands of characters per second for marking applications. This is the standard configuration for fiber laser engravers and marking systems. The work area is fixed (typically 100x100mm to 300x300mm depending on the lens), and the beam moves, not the part. Power range: 20W–200W.

Gantry (CNC) systems use motorised XY linear motion stages to move the cutting head over large sheets of metal. The beam is fixed relative to the head, and the head moves across the material. This is the standard configuration for industrial fiber laser sheet cutters. Power range: 1000W–30,000W+.

Handheld systems deliver the beam through a flexible fiber cable to a gun-style head that an operator moves manually (or a robot moves along a programmed path). This is the configuration used for laser welding, laser cleaning, and the cutting mode on 3-in-1 multi-function machines. Power range: 1000W–6000W for welding; 500W–3000W for cleaning.

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What Can You Do with a Fiber Laser? The Three Core Functions

Watch this overview of fiber laser machine applications across engraving, cutting and welding:

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Engraving and Marking on Metal

Fiber laser engraving and marking uses a galvo scan head at 20W–100W to create permanent, high-contrast marks on metal surfaces at very high speed. This is the most widely used application of low-to-mid-power fiber laser technology across industry — part identification, traceability, branding, and decorative work.

Deep Engraving, Surface Marking and MOPA Color Marking

Surface marking (sometimes called annealing marking) changes the colour of the metal surface through controlled heat without removing material. It creates a smooth, high-contrast mark — typically dark against stainless steel or titanium — that is durable, resistant to wear, and completely flush with the surface. Used extensively for medical devices, aerospace components, and luxury goods where surface integrity is critical.

Deep engraving removes material to create a recessed mark. At 30W–100W with multiple passes, fiber lasers produce deep, tactile engravings for serial numbers, die marks, and decorative work. A 50W fiber laser engraves to 0.5mm depth in stainless steel approximately 30% faster than a 30W system — the power difference becomes meaningful at the higher-depth, production-speed end.

MOPA (Master Oscillator Power Amplifier) colour marking on stainless steel and titanium is an advanced application where specific pulse durations produce controlled oxide layers that appear as distinct colours — black, gold, red, blue, and purple. MOPA fiber lasers (typically 20W–60W) give independent control over pulse width and frequency, enabling this colour palette that standard Q-switched fiber lasers can't produce. This is used for decorative work, permanent product branding, and high-value part identification.

Best Materials: Stainless Steel, Aluminum, Brass, Titanium

Fiber laser marking and engraving works on virtually all metals. Stainless steel and titanium are the most popular substrates due to their ability to produce high-contrast marks through annealing without material removal. Aluminum marks well but produces less contrast than stainless without specialised techniques. Brass and copper mark cleanly with appropriate settings. Carbon steel and mild steel mark well but require higher power for good contrast than stainless due to different surface absorption characteristics.

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Fiber Laser Cutting

Fiber laser cutting uses a gantry CNC system at 1000W–20,000W to slice metal sheet to profile by combining a high-intensity focused beam with assist gas to eject the melt and produce a clean kerf.

Thin Metal Cutting Capabilities and Limits

At 1000W–3000W — the range accessible to small and medium fabrication operations — fiber laser cutting handles thin to medium gauge metal effectively:

• 1mm mild steel: 15–25 m/min
• 3mm stainless steel: 3–5 m/min at 2000W
• 6mm mild steel: 1–2 m/min at 3000W
• 10mm stainless steel: requires 6kW+ for productive speeds

The assist gas choice matters: nitrogen produces a clean, oxide-free edge suitable for welding or painting; oxygen enables faster cutting of carbon steel through an exothermic assist reaction but leaves an oxidised edge. Aluminium requires 20–30% more power than equivalent-gauge steel due to its high reflectivity and thermal conductivity.

When You Need a Dedicated Fiber Laser Cutter vs a Combo Machine

A dedicated gantry fiber laser cutter is the right tool when cutting is your primary or high-volume production function. These machines use large-format beds (typically 1500x3000mm or larger), automated sheet loading systems, and cutting heads optimised for speed and cut quality across the full thickness range. They are not cheap — entry-level gantry cutters start at $15,000–$30,000 for 1000W–1500W systems — but they deliver cutting performance that the handheld cutting mode on a 3-in-1 welding machine cannot match for volume or material thickness.

The handheld cutting mode on a 3-in-1 laser welder is suitable for occasional thin-sheet cuts (1–3mm), trimming operations, and light profile work. It's not a replacement for a dedicated cutter for shops where cutting is a core service.

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Fiber Laser Welding

Fiber laser welding uses a handheld or automated delivery system at 1000W–6000W to join metal components by creating a deep, narrow melt pool that solidifies into a strong, clean seam.

Handheld Laser Welding: What It Can and Cannot Do

Handheld fiber laser welding is 4–10 times faster than TIG on thin-to-medium gauge steel and stainless, produces minimal post-weld finishing (often none on stainless steel), and has a substantially shorter operator learning curve than traditional arc processes. The typical capability range for a 1500W system is 0.5–4mm on steel and stainless, 0.5–3mm on aluminum.

What it cannot do: weld material above its power-determined penetration limit in a single pass; bridge large gaps without filler wire (tight fit-up is required for autogenous welding); replace TIG for multi-pass heavy section work or complex filler metal chemistry requirements; or work without shielding gas (argon or nitrogen is required for all practical metals). For a full assessment of handheld laser welding capabilities and the machine selection process, see our how to choose a handheld laser welder guide.

Which Fiber Laser Machines Include a Welding Function?

Handheld fiber laser welders are the primary machine category. These range from 1000W single-function welding-only units to 3-in-1 and 6-in-1 multi-function platforms. The GWEIKE M-Series 6-in-1 workstation, for example, combines welding, cutting, cleaning, and marking in one platform using the same fiber laser source. Dedicated welding-only machines from IPG (LightWELD), Trumpf, and major Chinese manufacturers are available across the full power range.

Automated robotic laser welding cells (3kW–20kW+) are the industrial production category — used for automotive, EV battery assembly, and high-volume fabrication — but these are capital investments in the six-figure range and a separate discussion from shop-floor handheld systems.

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What Is the Difference Between a Laser Engraver, Cutter and Welder?

Why These Three Functions Require Very Different Power and Setup

The power gap between these three function categories is the clearest illustration of why "fiber laser machine" isn't a useful single category:

A 20W engraver has roughly 1/50th the power of a 1000W welder. At 20W, the energy density at the focal point is sufficient to change the surface chemistry of metal, but nowhere near sufficient to create a melt pool that fuses two pieces. Conversely, a 2000W welding system would destroy any engraving work, as the power density is orders of magnitude beyond what's needed for surface marking.

The hardware configurations are also incompatible. The galvo scan head that moves a marking beam across a field at thousands of characters per second can't be used for welding, which requires sustained energy at a single advancing position. The handheld welding gun can't be used for galvo marking — it has no scanning mechanism and a completely different focal geometry.

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Can One Fiber Laser Machine Do All Three?

The 3-in-1 and 6-in-1 Multi-Function Platforms Explained

Multi-function platforms like the GWEIKE M-Series attempt to combine the most practically useful functions — typically welding, cutting, and cleaning on a 3-in-1, plus marking and engraving on a 6-in-1 — in a single machine using the same laser source and interchangeable heads. This works because welding, cleaning, and handheld cutting all operate in a similar power range (1000W–3000W) and can share the same laser source and fiber delivery.

Where these machines make compromises: the engraving/marking mode is a basic function using the welding power level, not the optimised galvo scan head of a dedicated marking system. For high-speed industrial marking or MOPA colour work, a dedicated marking machine outperforms the marking mode on a combo welding machine.

The honest summary: a 6-in-1 gives you welding (excellent), cleaning (very good), cutting (practical for light use), and marking (functional but not specialist-grade). For a shop that primarily welds and wants the other functions as supporting capabilities, the combo machine is a strong proposition. For a shop that primarily marks and engraves at volume, a dedicated marking system is the right tool.

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Choosing the Right Fiber Laser Machine for Your Needs

Matching Power Output to Your Primary Application

Engraving and Marking: 20W–100W

For part marking (serial numbers, barcodes, QR codes, logos) and general metal engraving, 20W–30W is sufficient for most industrial traceability applications. KEYENCE's published guidance on fiber marking systems notes that 20W covers the vast majority of manufacturers' marking needs, while 50W starts to show meaningful speed advantages for deep engraving on hard metals. 100W is the upper tier of dedicated marking systems — faster and capable of deeper work, but not meaningfully more precise than 30W for surface marking.

If MOPA colour marking on stainless or titanium is a requirement, specify a MOPA source (JPT MOPA or equivalent) explicitly — standard Q-switched sources can't produce the controlled oxide colour palette.

Cutting Thin Sheet: 1000W–3000W

For small-shop sheet metal cutting of steel and stainless up to 6–8mm, a 1500W–3000W gantry fiber laser is the practical range. 1500W covers up to approximately 4mm stainless cleanly; 2000W extends this to 5mm with better speed; 3000W opens up 6–8mm capability. For dedicated cutting operations on a small to medium shop floor, 2000W–3000W represents the most cost-effective range where productivity and machine cost balance well.

Welding: 1000W–6000W

1000W–1500W is the entry point for handheld laser welding on steel and stainless below 3mm. 1500W is the most widely deployed configuration for general fabrication. 2000W extends capability to 4–5mm and provides better speed margins across the full thickness range. 3000W and above is justified for regular heavy-gauge work above 5mm or for high-production shops where throughput on 3–5mm material is a daily priority.

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Key Features to Evaluate Before Buying

Software, Compatibility and Ease of Use

For marking and engraving systems, the software determines what's actually practical to do with the machine. EzCad (Windows-based, widely used with galvo marking systems) is the industry standard for galvo marking and works with the majority of mid-market fiber marking machines. Lightburn has added fiber laser galvo support and is popular for its more approachable interface. For cutting systems, compatibility with common CAD/CAM workflows (DXF import, nesting software integration) matters for production efficiency.

For welding systems, the parameter management interface is the primary concern — can you store and recall parameter sets for different materials and thicknesses? How easily can operators adjust wobble width, frequency, and power without accessing buried menus?

Safety Features and Enclosure Requirements

All fiber laser systems operating above 1mW are Class 4 lasers — the highest hazard classification — and require an appropriate safety framework. For marking and engraving systems, a fully enclosed cabinet with interlocked doors and filtered exhaust is the normal configuration; the enclosure handles most of the safety requirement. For handheld welding and cutting systems, the operator is outside any enclosure, which means the safety requirements fall on the workspace setup: Laser Controlled Area designation, laser-rated barrier curtains, appropriate PPE (OD7+ eyewear at 1070nm), and fume extraction.

For safety setup guidance covering the full PPE and workspace requirements for handheld fiber laser systems, see our laser welding safety guide.

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Fiber Laser vs CO2 vs Diode: Which Is Right for Metal Work?

Material Compatibility Comparison

The conclusion for metal-focused applications is unambiguous: fiber laser is the correct technology. CO2 and diode have legitimate uses in non-metal applications, but for steel, stainless, aluminum, and other engineering metals, fiber laser is the standard because of its wavelength match to metal absorption characteristics and its wall-plug efficiency advantage.

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Cost and Long-Term ROI Comparison

Diode engravers (xTool, Sculpfun, etc.): $200–$800. No practical metal welding or cutting capability, limited to surface marking on coated metals. Appropriate for hobbyists and makers working primarily with non-metals.

CO2 lasers (40W–150W): $500–$5,000. Excellent for non-metals, poor for most metal applications. Appropriate for shops working primarily with acrylic, wood, and similar materials.

Fiber laser engravers/markers (20W–100W galvo): $2,000–$8,000. Appropriate for metal part marking, traceability, and decorative metal engraving. Long service life (20,000–100,000 hours on the laser source), minimal maintenance compared to CO2.

Fiber laser welders (1000W–3000W handheld): $7,000–$22,000 for professional systems. Appropriate for fabrication, repair, and production welding on metal. Operating cost after purchase is primarily shielding gas and consumables — very low compared to labour savings on TIG-replaced work.

Fiber laser cutters (1000W–3000W gantry): $15,000–$60,000 for small-shop systems. Higher capital cost justified by production volume or capability requirements.

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When Each Technology Makes Sense

Choose fiber laser when: your work is primarily metal, you need welding or production cutting capability, or you need permanent, high-durability marks on metal parts.

Choose CO2 laser when: your work is primarily non-metal (acrylic signage, wood products, leather goods), or you need a complement to a fiber system for mixed-material production.

Choose diode laser when: you're a hobbyist or maker working with wood, leather, and non-metals, the budget is a genuine constraint, and metal work is incidental rather than your primary focus.

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Frequently Asked Questions: Fiber Laser Machines

Can a fiber laser engraver also weld?

No — not by adjusting the settings of an existing engraver. The power gap between engraving and welding is enormous: fiber laser engravers operate at 20W–100W, while the minimum practical power for laser welding metal is around 500W–1000W. A 20W engraver has less than 1/50th the power of an entry-level laser welder. You can't "turn up" an engraver to weld — the laser source, beam delivery, and hardware are all the wrong specification for welding. This is covered in detail in our can a laser engraver weld metal guide. The exception is very specialised micro-welding on ultra-thin foil at microscopic scale, which is not what most people mean when they ask this question.

What is the best fiber laser machine for a small metal shop?

For most small metal fabrication shops, the most practical first fiber laser investment is a handheld fiber laser welder at 1500W–2000W, potentially in a 3-in-1 or 4-in-1 configuration that adds cleaning and cutting. This gives you the function that most directly generates production value (welding), plus supporting functions for pre-weld cleaning and occasional thin-sheet cutting. If your shop does significant part marking or identification work, a separate 30W–50W galvo fiber marking system ($2,000–$5,000) makes sense alongside the welder. If production sheet cutting is a core service, a dedicated 1500W–2000W gantry cutter ($15,000–$30,000) is the right tool. Most small shops don't need all three from day one — start with the function that addresses your biggest current production bottleneck.

How much does a fiber laser machine cost?

Cost varies enormously by function and power tier. Galvo fiber laser engravers and marking systems run from approximately $2,000 for a basic 20W desktop unit to $8,000+ for a fully enclosed 60W–100W industrial marker with software and automation. Handheld fiber laser welders run from approximately $2,500–$5,000 for entry-level 1000W–1500W import systems to $7,000–$15,000 for professional mid-market 1500W–2000W systems, and $22,000–$45,000+ for premium industrial systems like the IPG LightWELD. Gantry fiber laser cutting machines start at approximately $15,000 for a 1000W system and scale to $60,000+ for 6kW+ production systems. For a full breakdown of laser welder pricing specifically, see our how to choose a handheld laser welder guide.

What materials can a fiber laser machine process?

The core application is metal in all its forms: carbon steel, stainless steel, aluminum alloys, copper, brass, titanium, nickel alloys, galvanised steel, and dissimilar metal combinations. Fiber lasers at marking power (20W–100W) can also mark anodised aluminum, coated metals, and some non-metallic materials. At cutting and welding power levels (1000W+), the material universe is metals only — the high power density would destroy most non-metals. Plastics and organic materials are not practical applications at welding or cutting power levels, and even marking applications on some plastics require careful parameter control to avoid burning.

Is a fiber laser machine difficult to learn?

It depends strongly on the function. Fiber laser marking and engraving systems are relatively straightforward — most operators become productive within hours using the machine's software and pre-set parameter libraries. Handheld laser welding has a meaningfully shorter learning curve than TIG welding (most operators produce functional welds within a day), though mastering parameter optimisation across materials and thicknesses takes weeks to months of consistent production work. Industrial laser cutting is the most parameter-sensitive — achieving optimal cut quality across the full thickness range on multiple materials requires training and experience, though the software and automation features of modern machines significantly reduce the manual skill required compared to earlier generations.