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    <title language="eng">Combination of an axicon and a spatial light modulator for the generation of multiBessel beams for microdrilling using ultrashort pulsed laser</title>
    <abstract language="eng">Due to their special beam profile, Bessel beams offer advantageous properties for micro-drilling and internal volume processing, especially for transparent materials. In addition, the laser power of industrial ultrashort pulsed lasers hasnincreased significantly in recent years, offering the possibility of highly efficient processes using multi-spot profiles. We report on optical simulations and an experimental optical setup for generating multi-Bessel beams by combining a refractive axicon and a spatial light modulator. This setup offers a new possibility of multi-Bessel beam generation by functional division of the Bessel beam generation by the axicon and the possibility of separation flexible beam splitting by a spatial light modulator. The beam profiles generated with this setup are analyzed and compared in this study using optical simulations and experiments. In addition to the analysis of the Bessel beams in the machining plane, they are also analyzed in the propagation direction by means of intensity distributions measured by a camera in small-step z positions. Furthermore, the experimental applicability of the module-based beam shaping system is demonstrated by integrating into an existing laser system.</abstract>
    <parentTitle language="eng">Laser-based Micro- and Nanoprocessing XVIII</parentTitle>
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    <author>Christian Lutz</author>
    <editor>Rainer Kling</editor>
    <author>Simon Schwarz</author>
    <editor>Wilhelm Pfleging</editor>
    <author>Jan Marx</author>
    <editor>Koji Sugioka</editor>
    <author>Cemal Esen</author>
    <author>Ralf Hellmann</author>
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      <language>deu</language>
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      <value>Ultrakurzzeitlaser</value>
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    <collection role="institutes" number="">Angewandte Lasertechnik und Photonik (alp)</collection>
    <collection role="forschungsschwerpunkte" number="">Innovative Material Processing</collection>
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