SLS2030 Dual Laser Options: Fiber Laser vs CO₂ Laser for Industrial SLS Printing

The Supermaker SLS2030 is a compact industrial SLS printer designed for medium-sized parts and cost-effective production. It offers a feature that is rare in its class: a choice between two laser types—fiber laser and CO₂ laser.  

This choice is not about one laser being “better” than the other. It is about matching the laser wavelength to the material you want to print. The laser type determines which powders absorb energy efficiently enough to sinter, which in turn determines the color, mechanical performance, and application of the final part.

This article explains the technical differences between fiber and CO₂ lasers, what those differences mean for material compatibility, and how to choose the right configuration for your production needs.

Why Laser Wavelength Matters in SLS Printing

SLS works by using a laser to heat polymer powder until the particles fuse together. For this to happen efficiently, the powder must absorb the laser energy. If the powder reflects or transmits the laser light instead of absorbing it, the sintering process fails or produces weak, poorly fused parts.

Different polymer powders absorb different wavelengths of light to varying degrees. This is the fundamental reason why the SLS2030 offers two laser options.

The Physics of Absorption

Thermoplastic polymers absorb far more energy at longer wavelengths—specifically in the 10.6 µm range—than they do at the shorter wavelengths used by fiber lasers (around 1.064 µm). This is because the carbon-hydrogen bonds in polymers like nylon (PA12, PA11) have strong absorption bands in the mid-infrared region that CO₂ lasers produce.

In practice, this means:

A CO₂ laser (10.6 µm wavelength) is naturally absorbed by standard white nylon powders, enabling efficient sintering without additives.

A fiber laser (1.064 µm wavelength) is poorly absorbed by white nylon. To make fiber lasers work with nylon, the powder must contain a dark optical absorber—typically carbon black—to capture the laser energy.

This single physical difference explains almost everything about how the two laser options are used.

Fiber Laser Option: Black Powder Printing

A fiber laser SLS system is optimized for printing dark-colored powders, most commonly black nylon.

How Fiber Laser Sintering Works

The SLS2030 can be equipped with a fiber laser with 40W or 100W power depending on configuration. The fiber laser produces a tightly focused beam with high power density, which allows for fast scanning speeds and fine feature resolution.

Because white nylon reflects the fiber laser’s wavelength, the powder must be modified with a black absorber (carbon black or similar) to absorb the energy. This is why fiber laser SLS systems are associated with black powder printing.

Advantages of Fiber Laser SLS

Finer beam spot: Fiber lasers produce smaller spot sizes than CO₂ lasers, enabling higher precision and finer detail resolution.

Higher power density: The focused beam delivers energy more efficiently, potentially reducing sintering time per layer.

Longer laser lifespan: Fiber lasers typically have longer operational life and require less maintenance than CO₂ lasers.

Lower system cost: Fiber laser systems are generally less expensive than comparable CO₂ laser systems.

Applications for Fiber Laser SLS

Fiber laser SLS is well-suited for:

Functional black parts where color is not a concern

Prototypes and production parts in black nylon (PA12, PA11)

Applications requiring fine detail where fiber laser’s smaller spot size is advantageous

Cost-sensitive production where fiber laser’s lower system cost is a benefit

The SLS2030 with fiber laser supports materials including PA11, PA12, TPU, and glass-filled nylon.

CO₂ Laser Option: White and Colored Part Production

A CO₂ laser SLS system is optimized for printing standard white powders, which can then be dyed to achieve almost any color.

How CO₂ Laser Sintering Works

The SLS2030 can be equipped with a CO₂ laser (typically 100W) that emits at 10.6 µm wavelength. This wavelength is strongly absorbed by the carbon-hydrogen bonds in nylon powder, meaning standard white powder can be sintered efficiently without dark additives.

The CO₂ laser is the traditional workhorse of industrial SLS. Most industrial SLS systems are designed around CO₂ lasers because of their excellent energy absorption by standard polymer powders.

Advantages of CO₂ Laser SLS

Standard powder compatibility: Works with standard white nylon powders without requiring special dark absorbers.

White part production: Enables production of white parts, which can then be dyed to specific colors using post-processing equipment.

Consistent sintering: The high absorption efficiency leads to well-fused, dense parts with consistent mechanical properties.

Industrial proven: CO₂ lasers have been the standard for industrial SLS for decades, with extensive process knowledge and material validation.

Applications for CO₂ Laser SLS

CO₂ laser SLS is ideal for:

Consumer-facing products requiring specific colors (white parts can be dyed)

Medical and dental applications where white or light-colored parts are preferred

Industrial production where standard white powders are the norm

Applications requiring maximum material flexibility (most commercial SLS powders are optimized for CO₂ laser absorption)

The SLS2030 with CO₂ laser supports the same material range—PA11, PA12, TPU, and glass-filled nylon—but with the advantage of using standard white powder formulations.

Side-by-Side Comparison: Fiber vs CO₂ Laser for SLS2030

How to Choose the Right Laser for Your Application

The choice between fiber and CO₂ laser depends on what you need to produce.

Choose Fiber Laser If:

You primarily print black functional parts

Fine detail and precision are priorities

You want lower upfront equipment cost

Your application does not require colored parts

You value longer laser lifespan and lower maintenance

Choose CO₂ Laser If:

You need white parts that can be dyed to specific colors

You produce consumer-facing products with branding color requirements

You work with medical or dental applications where white is preferred

You want maximum material compatibility with standard commercial powders

You produce visual prototypes or display models

Can You Have Both?

The SLS2030 is configured with one laser type at purchase. It is not a dual-laser system where both can be used simultaneously. The choice must be made based on your dominant application requirements.

For manufacturers who need both black and white part capabilities, operating two SLS2030 units with different laser configurations may be the practical solution.

Frequently Asked Questions

Can a fiber laser SLS printer print white powder?

No, not without modification. White powder reflects the fiber laser’s wavelength, so a dark optical absorber must be added to the powder. This is why fiber laser SLS is associated with black powder printing.

Can a CO₂ laser SLS printer print black powder?

Yes. CO₂ lasers can sinter both white and black powders. Black powders absorb energy even more readily than white powders, so they print well on CO₂ systems.

Why can CO₂ lasers print white powder while fiber lasers cannot?

The 10.6 µm wavelength of CO₂ lasers is strongly absorbed by the carbon-hydrogen bonds in nylon. The 1.064 µm wavelength of fiber lasers is not, so white nylon reflects most of the fiber laser energy.

Which laser type produces better part quality?

Both produce high-quality parts when matched with the appropriate powder. Fiber lasers offer finer beam spot sizes for detail resolution. CO₂ lasers offer the proven, consistent sintering that has made them the industrial standard.

Can I upgrade the SLS2030 from fiber to CO₂ laser later?

The laser type is a factory configuration. Upgrading after purchase is not a standard option. The choice should be made based on your production requirements at the time of purchase.

What materials work with each laser option?

Both laser options support PA11, PA12, TPU, and glass-filled nylon. The difference is the powder formulation: fiber laser requires black powder with optical absorber, while CO₂ laser works with standard white powder.

Conclusion

The Supermaker SLS2030’s dual laser option gives manufacturers a choice that directly affects what they can produce. Fiber laser enables black functional parts with fine detail and lower system cost. CO₂ laser enables white parts that can be dyed to any color, with maximum compatibility with standard commercial powders.

Neither option is universally superior. The right choice depends on your material requirements, part color needs, and production priorities. For manufacturers producing black functional components, fiber laser offers efficiency and precision. For those needing white or colored consumer products, CO₂ laser is the proven path.