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Updated: May 17, 2026

10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
2-kW average power capability of a liquid face-cooled, rotating multi-disk amplifier technology
Optics Letters
|May 15, 2026
Summary
New diode-pumped Yb:YAG lasers achieve 2 kW average power using a rotating multi-disk amplifier with heavy water cooling. This technology advances high-power, high-energy picosecond lasers towards the 10-kW level.
Area of Science:
- Laser Physics
- Materials Science
Background:
- High-power laser systems are crucial for advanced applications.
- Existing technologies face limitations in scaling average power and pulse energy.
Purpose of the Study:
- To demonstrate a novel diode-pumped, rotating multi-disk Yb:YAG laser amplifier.
- To achieve multi-kilowatt average power levels for intense laser applications.
Main Methods:
- Utilized a diode-pumped, rotating multi-disk Yb:YAG architecture.
- Implemented direct face-cooling with heavy water.
- Configured an 8-pass amplification system.
Main Results:
- Achieved 2 kW average power at 1030 nm in continuous wave mode.
- Demonstrated a slope efficiency of 33% and extractable energy of 4.3 J.
- Maintained pointing stability of 2.5 µrad rms despite disk rotation.
Conclusions:
- The face-cooled rotating multi-disk amplifier (FCRMDA) technology enables significant increases in average power.
- This advancement supports the development of joule-class picosecond lasers towards the 10-kW power level.
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