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 proceedingConference article in proceedingsProfessional

    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 languageEnglish
    Title of host publicationDoc. No IIW-I-1210-13
    Number of pages10
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event66th Annual Assembly & International Conference of the International Institute of Welding - Essen, Germany
    Duration: 11 Sep 201317 Sep 2013

    Conference

    Conference66th Annual Assembly & International Conference of the International Institute of Welding
    CountryGermany
    CityEssen
    Period11/09/1317/09/13

    Keywords

    • spatial light modulator
    • computer generated hologram
    • fiber laser
    • laser cutting

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  • Cite this

    Kaakkunen, J. J. J., Laakso, P., & Kujanpää, V. (2013). Flexible multibeam laser cutting with fiber laser using spatial light modulator. In Doc. No IIW-I-1210-13