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Polarization effects in ultrashort-pulse laser drilling

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Abstract.

A strong influence of the polarization of the laser radiation on the geometry of laser-machined microdrillings has been observed for ultrashort pulses. For drillings with a certain aspect ratio, reflections at the hole walls take place, leading to a non-uniform intensity distribution deep inside the formed hole. Experimental and theoretical results on this subject are discussed. It is shown that a rotation of the polarization during the drilling process (“polarization trepanning”) significantly improves the quality of the produced holes.

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Authors and Affiliations

  1. Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany (Fax: +49-511/2788-100, E-mail: sn@lzh.de), , , , , , DE

    S. Nolte, C. Momma, G. Kamlage, A. Ostendorf, C. Fallnich, F. von Alvensleben & H. Welling

Authors
  1. S. Nolte
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  2. C. Momma
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  3. G. Kamlage
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  4. A. Ostendorf
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  5. C. Fallnich
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  6. F. von Alvensleben
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  7. H. Welling
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Additional information

Received: 21 August 1998 / Accepted: 25 November 1998 / Published online: 17 March 1999

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Nolte, S., Momma, C., Kamlage, G. et al. Polarization effects in ultrashort-pulse laser drilling . Appl Phys A 68, 563–567 (1999). https://doi.org/10.1007/s003390050941

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  • DOI: https://doi.org/10.1007/s003390050941

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