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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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400W Yb:YAG Innoslab fs-Amplifier.

P Russbueldt1, T Mans, G Rotarius

  • 1Fraunhofer Institute for Laser Technology, Steinbachstr. 15, 52074 Aachen, Germany. Peter.Russbueldt@ilt.fraunhofer.de

Optics Express
|August 6, 2009
PubMed
Summary

A new Innoslab laser design for ytterbium-doped materials achieves high-power, ultrashort pulses without complex amplification techniques. This scalable system demonstrates efficient, high-quality laser performance at room temperature.

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Area of Science:

  • Laser Physics
  • Materials Science

Background:

  • The Innoslab design is established for neodymium-doped laser crystals.
  • High-power diode lasers enable efficient pumping of quasi-three-level laser materials.

Purpose of the Study:

  • Adapt the Innoslab design for ytterbium-doped laser materials.
  • Compare Innoslab amplifiers with thin-disk and fiber fs-amplifiers.
  • Develop a compact, scalable diode-pumped Yb:YAG Innoslab fs-oscillator-amplifier system.

Main Methods:

  • Applied the Innoslab design to ytterbium-doped laser materials.
  • Conducted numerical simulations to determine conditions for high efficiency and beam quality.
  • Developed a compact diode-pumped Yb:YAG Innoslab fs-oscillator-amplifier system.

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Main Results:

  • Achieved nearly transform and diffraction-limited 680 fs pulses.
  • Reached 400 W average output power at a 76 MHz repetition rate.
  • Demonstrated performance at room temperature without chirped pulse amplification (CPA) technology.

Conclusions:

  • The Innoslab design is effectively applied to ytterbium-doped materials for high-power ultrashort pulse generation.
  • The developed system is scalable to the kilowatt range.
  • The system offers efficient, high-beam-quality laser output without CPA.