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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Efficient pump beam shaping for high-power thin-disk laser systems.

Rui Pereira1, Birgit Weichelt, Dawei Liang

  • 1CEFITEC, Departamento de Física, FCT, Universidade Nova de Lisboa, 2825, Campus de Caparica, Portugal. r.p.pereira@gmail.com

Applied Optics
|September 22, 2010
PubMed
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A novel optical fiber bundle beam-shaping technique efficiently couples high-power laser-diode stacks to thin-disk lasers. This method doubles power density compared to direct coupling, achieving 80% transmission efficiency.

Area of Science:

  • Optics and Photonics
  • Laser Technology
  • Materials Science

Background:

  • High-power laser-diode stacks are crucial for various industrial and scientific applications.
  • Efficiently coupling laser output to subsequent systems, like thin-disk lasers, is essential for maximizing performance.
  • Direct coupling methods can be limited by power density and beam quality.

Purpose of the Study:

  • To develop and demonstrate an efficient beam-shaping technique for high-power laser-diode stacks.
  • To enhance power density transmission to thin-disk lasers.
  • To improve the coupling efficiency and beam quality for laser systems.

Main Methods:

  • Utilizing a compact optical fiber bundle for beam reconfiguration and transmission.
  • Comparing the developed technique with direct coupling using an octagonal fused silica rod.

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  • Measuring transmission efficiency and calculating power density and beam distribution.

    • Main Results:

    • Achieved a factor of 2 increase in power density compared to direct coupling.
    • Measured a transmission efficiency of 80% for the beam shaper.
    • Numerically calculated a top-hat power distribution at the thin-disk laser crystal.

    Conclusions:

    • The optical fiber bundle beam-shaping technique offers a significant improvement in power density and efficiency for laser coupling.
    • This method provides a viable solution for enhancing the performance of thin-disk laser systems.
    • The technique demonstrates potential for broader applications in high-power laser delivery and reconfiguration.