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Vacuum-ultraviolet beam array generation by flat micro-optical structures.

R Grunwald1, U Neumann, V Kebbel

  • 1Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2A, D-12489 Berlin, Germany. grunwald@mbiberlin.de

Optics Letters
|May 18, 2004
PubMed
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Researchers created micro-optical structures for vacuum ultraviolet (VUV) laser beam shaping using thin-film deposition. These structures generate Bessel-like beams for advanced laser applications.

Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Vacuum ultraviolet (VUV) lasers require precise beam control for applications.
  • Micro-optical elements are crucial for advanced laser system miniaturization and performance.

Purpose of the Study:

  • To develop micro-optical structures for VUV laser beam shaping and wave-front sensing.
  • To generate Bessel-like beams with small conical angles at 157 nm.
  • To investigate beam propagation characteristics and propose beam cleaning methods.

Main Methods:

  • Fabrication of micro-optical structures via thin-film deposition on CaF2 substrates.
  • Transfer of structures using etching techniques.
  • Generation of Bessel-like beams using microaxicon lenses.
  • Experimental and simulation-based analysis of beam propagation.

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Main Results:

  • Successful manufacturing of micro-optical structures for VUV applications.
  • Generation of arrays of Bessel-like F2 laser beams at 157 nm with small conical angles.
  • Validation of beam propagation through simulations and experiments.

Conclusions:

  • Micro-optical structures fabricated by thin-film deposition and etching are effective for VUV laser beam shaping.
  • Microaxicon lenses can generate specific beam profiles for VUV lasers.
  • Apodization using absorbing layers is a viable strategy for VUV beam cleaning.