Beam shaper for high power laser

Beam Shaper Features

Generally, transmission-type beam shapers (Diffractive Optical Elements: DOEs) used to change the beam shape cannot maintain their performance when applied to high-power lasers due to the effect of heat generation, limiting their range of use.
NTT-AT 's reflective beam shaper can directly cool the elements using a cooling unit, so it can perform well even with high-power lasers over 10 kW.
In particular, when used in laser processing applications, various beam shapes can be generated that are ideal for laser processing, such as top hat, ring, line beams, or non-diffracting beams like Bessel beams.

• The DOE substrate that functions as a beam shaper can be selected from SiC, Si, metal, etc.
• Light utilization efficiency depends on the gradation of the surface depth. Currently, up to 64 gradations are available.
• We design and manufacture beam shapers according to customer needs (wavelength, light source M2, incident angle, focal length, imaging pattern).

Relationship between surface gradation and light utilization efficiency

Surface depth gradation	Light utilization efficiency
16	93.1 %
8	81.6 %
4	53.2 %
2	30.9 %

Beam shaper application examples

• Application to high power laser processing ... Reflective beam shaper for laser processing
• Application to thick steel processing, etc. ... Reflective beam shaper for forming long focal beam
• Various wavefront design examples ... Reflective beam shaper that allows free wavefront design

Reflective beam shaper for laser processing

We will manufacture a reflective beam shaper that is compatible with high-power lasers exceeding 10kW.
We design, manufacture and provide patterns that match your laser specifications (wavelength, beam shape, single mode, multimode, beam size, etc.) and the desired output beam shape.
Upon request, we can also provide individual mounting jigs. Please feel free to contact us.

Application example for laser processing

Lasers are used in a wide range of fields such as cutting, drilling, welding, marking, annealing, and ablation. increase.

Reflective beam shaper for long-focus beam formation

NTT-AT 's reflective beam shapers allow for free wavefront design. They allow for free optical design without the need for imaging lenses, and can generate non-diffracting beams such as Bessel beams and Laguerre-Gaussian beams.

The following figure shows an example of a Bessel beam. A Bessel beam with a focal point of 350 mm was generated, and the focal depth was more than ±100 mm.
Even under atmospheric turbulence, the change in peak intensity can be kept extremely small.

Reflective beam shaper that allows free wavefront design

NTT-AT 's reflective beam shapers allow for free wavefront design. They allow for free optical design without the need for imaging lenses, and can generate any beam shape.

For example, by inputting divergent light (5mmφ Gaussian beam) from an optical fiber into the DOE, we were able to generate images of Saturn (rings and central bright spot), a long and thin rectangle, and multiple beams 350mm away (below is a photo of the actual image formed).

We design beam patterns according to customer requests and manufacture beam shapers.

Specification example

The following specifications are examples. We can also accommodate requests for other beam patterns, optical designs, wavelengths, etc., so please feel free to contact us.

Please contact us for other substrates such as quartz and sapphire.
* Please contact us for laser power exceeding 10kW.

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Contact us

Please feel free to contact us for inquiries such as an estimate.