Applied Physics A

, Volume 116, Issue 3, pp 1353–1364 | Cite as

Comparative theoretical analysis of continuous wave laser cutting of metals at 1 and 10 μm wavelength

  • Michael H. Brügmann
  • Thomas Feurer


We present a derivation and, based on it, an extension of a model originally proposed by V.G. Niziev to describe continuous wave laser cutting of metals. Starting from a local energy balance and by incorporating heat removal through heat conduction to the bulk material, we find a differential equation for the cutting profile. This equation is solved numerically and yields, besides the cutting profiles, the maximum cutting speed, the absorptivity profiles, and other relevant quantities. Our main goal is to demonstrate the model’s capability to explain some of the experimentally observed differences between laser cutting at around 1 and 10 μm wavelengths. To compare our numerical results to experimental observations, we perform simulations for exactly the same material and laser beam parameters as those used in a recent comparative experimental study. Generally, we find good agreement between theoretical and experimental results and show that the main differences between laser cutting with 1- and 10-μm beams arise from the different absorptivity profiles and absorbed intensities. Especially the latter suggests that the energy transfer, and thus the laser cutting process, is more efficient in the case of laser cutting with 1-μm beams.


Cutting Speed Laser Cutting Focal Position Conductive Loss Disk Laser 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors are indebted to B. Neuenschwander, R. Augsburger, and V. Romano for helpful discussions and the Swiss KTI for financial support.


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© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Institute of Applied PhysicsUniversity of BernBernSwitzerland

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