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Products/Beam Shaping/Beam Homogenizers
Beam Shaping · flat-top for multimode lasers

Beam Homogenizers

We build a uniform flat-top for multimode lasers: the workhorse for high-power fiber lasers in hardening, welding and cladding. That means turning a messy multimode beam into a homogeneous spot in the shape you need, then dropping it into your process head, alignment-free.

For multimode fiber lasers Round · square · custom Alignment-free integration
Measured homogenized flat-top beam profile — a uniform square field of intensity with clean, even edges
The outcome

Even energy across the whole spot, whatever the raw beam looks like

Multimode fiber lasers carry enormous power, but their raw beam shape is lumpy and unrepeatable: hot spots that scorch, cold spots that leave the job half-done. A beam homogenizer flattens all of that into a uniform plateau in the dimensions your process needs, so a hardened track, a weld seam or a clad layer gets the same energy density everywhere. Consistent input, consistent result.

How it works

Many modes, many orders: deliberately overlapped

It's the same all-reflective, micro-structured mirror technology as our splitters, used the other way around.

How a homogenizer builds a flat-top from diffraction orders Many discrete diffraction orders (individual peaks) overlap and sum into a single uniform flat-top plateau. Sum = uniform flat-top The overlapping orders average into one even plateau Individual diffraction orders (base orders)
We design a splitter whose diffraction orders overlap: the many spatial modes of the source fill in the gaps and average out to a single homogeneous flat-top.

Instead of a single shaped beam, we design a micro-structured mirror that splits the beam into many diffraction orders, its base orders, and lays them on top of one another. A multimode source is the perfect input for this: its many modes wash out the residual structure, and what lands on the workpiece is a clean, uniform plateau, round, square or rectangular, exactly the shape we designed for.

Because the result is built from overlapping orders rather than a single focus, it’s almost insensitive to how the beam is delivered, which makes it straightforward to integrate into a process head without a fine-alignment step.

The result on the workpiece: a uniform plateau in the shape your process needs:

Homogenized round flat-top beam profile
Round
Homogenized square flat-top beam profile
Square
Homogenized rectangular flat-top beam profile
Rectangular
Highlight

Optimized for your beam's BPP

A multimode beam is defined by its beam parameter product (BPP): the measure of how much light you have and how it spreads. We design the homogenizer around your laser’s BPP, not a generic beam, so the overlapping orders match your actual mode content. Matching that mode content lets us push homogeneity and edge definition to the best your source can give, and it’s why two lasers with the same wattage but different BPP end up with two different, individually optimized designs.

Send us your beam, we design around it

Wavelength, power, fiber core diameter / NA (or measured BPP), and the spot shape and size your process needs: that’s all we need to propose a homogenizer feasibility for your setup.

Which flat-top is right for you?

Multimode homogenizer, or single-mode Top-Hat?

It comes down to your laser. The homogenizer is built for high-power multimode sources; the Top-Hat Beam Shaper is built for clean single-mode beams.

This page

Beam Homogenizer

For multimode lasers. Turns a high-power, high-BPP fiber-laser beam into a uniform spot in the shape you need. Alignment-free integration, forgiving of beam delivery: the workhorse for hardening, welding and cladding.

  • Multimode / high-BPP fiber lasers
  • Round, square or rectangular
  • Alignment-free process-head integration
  • Hardening · welding · cladding · brazing
Related product

Top-Hat Beam Shaper

For single-mode lasers. Converts a clean Gaussian into a precise flat-top from 1.5× to 10× the spot, at >90–95% efficiency, for micromachining, precision cutting and drilling where the beam is single-mode.

  • Single-mode lasers, M² < 1.5
  • Precise 1.5–10× plateau, any shape
  • Highest efficiency, >90–95%
  • Micromachining · cutting · drilling
View Top-Hat Beam Shaper →

Not sure which regime your laser falls in? Send us the source and we’ll tell you which shaper fits, and design it around your beam.

Fit check

Will it fit your setup?

Every homogenizer is designed around your laser and process head. We design against the parameters below: send them and we run a feasibility for your exact configuration.

Laser
multimode fiber laser (typ. 1064/1070 nm)
Power
hundreds of W to multi-kW
Beam quality
your BPP — or fiber core Ø & NA
Target shape
round · square · rectangular / custom
Target size
spot dimensions on the part
Integration
your process head / working distance
Technical evidence

Typical specifications

Parameter Typical
Flat-top geometry
Shape Round, square, rectangular, or custom
Spot size Millimetres to centimetres, configuration-dependent
Efficiency Typ. >90%
Homogeneity Typ. <10% plateau uniformity, optimized to your BPP
Input beam
Source Multimode fiber laser
Wavelength Deep-UV to near-IR; 1064/1070 nm typical for high-power fiber lasers
Beam quality Designed around your BPP (fiber core diameter & NA)
Power Low power to multi-kW
Integration
Alignment Alignment-free — designed to drop into your process head
Optics type All-reflective, micro-structured mirror
Further specs
Material Micro-structured dielectric HR coating on fused silica substrate
Delivery Custom, typically within 3 weeks
FAQ

Frequently asked questions

How is this different from the Top-Hat Beam Shaper?
The Top-Hat Beam Shaper is built for clean single-mode lasers and gives a precise, high-efficiency flat-top. The homogenizer is built for high-power multimode fiber lasers: it overlaps many diffraction orders so the source’s many modes average into a uniform spot. Different laser, different physics, different job.
How does the homogenization actually work?
We design an all-reflective, micro-structured mirror that splits your beam into many diffraction orders (its base orders) and overlaps them. With a multimode source, the many spatial modes wash out the residual structure and fill in a homogeneous plateau in the shape we designed for: round, square or rectangular.
Why do you need my BPP?
The beam parameter product describes your beam’s mode content: how much light you have and how it diverges. We design the overlapping orders around your specific BPP so the result is optimized for your actual laser, not an idealized one. Two lasers of the same power but different BPP get two different designs.
How much alignment does it need?
Because the flat-top is built from overlapping orders rather than a single precise focus, it’s almost insensitive to how the beam is delivered: no fine focus positioning, no iterative alignment step. What does matter is the shaper’s orientation to the beam, which is fixed once when it goes in. We confirm the integration for your specific head.
What shapes and sizes can I get?
Round, square, rectangular, or custom, sized to your process, typically in the mm to cm regime. Exact spot dimensions depend on your beam and working distance; we confirm what’s achievable for your configuration.
Can you give me exact specifications?
Not from a catalogue: a homogenizer is designed around your beam, so the real numbers come from a feasibility check on your laser. Send us your wavelength, power, BPP (or fiber core diameter and NA) and target shape, and we’ll return achievable values for your setup.

Have a multimode laser to homogenize?

Send us your source (wavelength, power and BPP) and the spot you need. We’ll run a feasibility and design a homogenizer around your beam.

Discuss your challenge