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Updated: Mar 26, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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High power Nd:YAG spinning disk laser.

Andrew P Ongstad, Matthew Guy, Joeseph R Chavez

    Optics Express
    |February 3, 2016
    PubMed
    Summary
    This summary is machine-generated.

    A novel high-power Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) spinning disk laser achieved 200 W continuous wave output with 64% efficiency. Excellent thermal management was demonstrated, crucial for high-power laser applications.

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    Area of Science:

    • Laser Physics
    • Materials Science
    • Optical Engineering

    Background:

    • High-power lasers are essential for various scientific and industrial applications.
    • Nd:YAG lasers are widely used due to their robust performance and efficiency.
    • Effective thermal management is critical for maintaining laser performance and longevity at high power levels.

    Purpose of the Study:

    • To develop and characterize a high-power continuous wave (CW) Nd:YAG spinning disk laser.
    • To evaluate the thermal management capabilities of the spinning disk design under high-power operation.
    • To assess the laser's performance in both CW and pulsed modes.

    Main Methods:

    • Utilized an 8 cm diameter Nd:YAG disk.
    • Employed a spinning disk configuration with rotation speeds of 1200-1800 RPM.

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  • Implemented helium (He) impingement cooling for thermal dissipation.
  • Measured CW and pulsed (5 ms pulses at 10 Hz) output power and beam quality.
  • Monitored disk temperature increase and calculated thermal dissipation per unit output power.

    • Main Results:

    • Achieved 200 W CW output power with 323 W of absorbed pump power.
    • Obtained a high power conversion efficiency of 64%.
    • Demonstrated near-diffraction-limited beam quality.
    • Observed minimal performance difference between CW and pulsed operation, indicating effective thermal management.
    • Measured a disk temperature increase of only 17 °C, reaching a maximum of ~31 °C.
    • Reported a thermal dissipation of 0.61 W/W, lower than typical values for diode-pumped Nd:YAG lasers.

    Conclusions:

    • The developed Nd:YAG spinning disk laser exhibits high power and efficiency.
    • The spinning disk design with He impingement cooling provides superior thermal management.
    • This technology offers a promising solution for high-power laser requirements with improved thermal stability.