Flexible multibeam laser cutting with fiber laser using spatial light modulator

Jarno J.J. Kaakkunen; Petri Laakso; Veli Kujanpää

Flexible multibeam laser cutting with fiber laser using spatial light modulator

Jarno J.J. Kaakkunen, Petri Laakso, Veli Kujanpää

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Professional

Abstract

Laser cutting with multibeam diffraction pattern using an adaptive optics is studied. IR continuous single-mode fiber laser with maximum power of 200 W is applied, with liquid crystal on silicon spatial light modulator (Lcos-SLM), for laser cutting of thin metal sheets. SLM can be used as the adaptive diffractive optical element to modify laser beam profile almost arbitrary. In this paper it is shown that even simple intensity profiles of the cutting beam are enough to enhance the cutting. It was seen that by the spatially intensity modulating the single laser cutting spot into various spots it is possible to enhance the cutting quality and also decrease pressure of the needed assist gas. It was seen that amount of the burr can be decreased and burr free cuts can be made with less protection gas compared to single beam laser cutting.

Original language	English
Title of host publication	Doc. No IIW-I-1210-13
Number of pages	10
Publication status	Published - 2013
MoE publication type	Not Eligible
Event	66th Annual Assembly & International Conference of the International Institute of Welding - Essen, Germany Duration: 11 Sep 2013 → 17 Sep 2013

Conference

Conference	66th Annual Assembly & International Conference of the International Institute of Welding
Country	Germany
City	Essen
Period	11/09/13 → 17/09/13

Keywords

spatial light modulator
computer generated hologram
fiber laser
laser cutting

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Cite this

@inproceedings{048030fddee146f09c0042e6dfa85625,

title = "Flexible multibeam laser cutting with fiber laser using spatial light modulator",

abstract = "Laser cutting with multibeam diffraction pattern using an adaptive optics is studied. IR continuous single-mode fiber laser with maximum power of 200 W is applied, with liquid crystal on silicon spatial light modulator (Lcos-SLM), for laser cutting of thin metal sheets. SLM can be used as the adaptive diffractive optical element to modify laser beam profile almost arbitrary. In this paper it is shown that even simple intensity profiles of the cutting beam are enough to enhance the cutting. It was seen that by the spatially intensity modulating the single laser cutting spot into various spots it is possible to enhance the cutting quality and also decrease pressure of the needed assist gas. It was seen that amount of the burr can be decreased and burr free cuts can be made with less protection gas compared to single beam laser cutting.",

keywords = "spatial light modulator, computer generated hologram, fiber laser, laser cutting",

author = "Kaakkunen, {Jarno J.J.} and Petri Laakso and Veli Kujanp{\"a}{\"a}",

year = "2013",

language = "English",

booktitle = "Doc. No IIW-I-1210-13",

note = "66th Annual Assembly & International Conference of the International Institute of Welding ; Conference date: 11-09-2013 Through 17-09-2013",

}

TY - GEN

T1 - Flexible multibeam laser cutting with fiber laser using spatial light modulator

AU - Kaakkunen, Jarno J.J.

AU - Laakso, Petri

AU - Kujanpää, Veli

PY - 2013

Y1 - 2013

N2 - Laser cutting with multibeam diffraction pattern using an adaptive optics is studied. IR continuous single-mode fiber laser with maximum power of 200 W is applied, with liquid crystal on silicon spatial light modulator (Lcos-SLM), for laser cutting of thin metal sheets. SLM can be used as the adaptive diffractive optical element to modify laser beam profile almost arbitrary. In this paper it is shown that even simple intensity profiles of the cutting beam are enough to enhance the cutting. It was seen that by the spatially intensity modulating the single laser cutting spot into various spots it is possible to enhance the cutting quality and also decrease pressure of the needed assist gas. It was seen that amount of the burr can be decreased and burr free cuts can be made with less protection gas compared to single beam laser cutting.

AB - Laser cutting with multibeam diffraction pattern using an adaptive optics is studied. IR continuous single-mode fiber laser with maximum power of 200 W is applied, with liquid crystal on silicon spatial light modulator (Lcos-SLM), for laser cutting of thin metal sheets. SLM can be used as the adaptive diffractive optical element to modify laser beam profile almost arbitrary. In this paper it is shown that even simple intensity profiles of the cutting beam are enough to enhance the cutting. It was seen that by the spatially intensity modulating the single laser cutting spot into various spots it is possible to enhance the cutting quality and also decrease pressure of the needed assist gas. It was seen that amount of the burr can be decreased and burr free cuts can be made with less protection gas compared to single beam laser cutting.

KW - spatial light modulator

KW - computer generated hologram

KW - fiber laser

KW - laser cutting

M3 - Conference article in proceedings

BT - Doc. No IIW-I-1210-13

T2 - 66th Annual Assembly & International Conference of the International Institute of Welding

Y2 - 11 September 2013 through 17 September 2013

ER -