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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Composite Yb:YAG/SiC-prism thin disk laser.

G A Newburgh1, A Michael, M Dubinskii

  • 1US Army Research Laboratory, RDRL-SEE-O, 2800 Powder Mill Rd., Adelphi, MD 20783,USA. gnewburgh@arl.army.mil

Optics Express
|August 20, 2010
PubMed
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This study demonstrates a novel Ytterbium-doped Yttrium Aluminum Garnet (Yb:YAG) thin disk laser. It utilizes intracavity face-cooling and total internal reflection (TIR) for efficient, coating-free operation.

Area of Science:

  • Laser Physics
  • Materials Science
  • Optical Engineering

Background:

  • Thin disk lasers offer high power but face thermal management challenges.
  • Intracavity optical coatings can limit laser performance and reliability.
  • Efficient heat dissipation is crucial for high-power laser systems.

Purpose of the Study:

  • To demonstrate a novel Yb:YAG thin disk laser design.
  • To implement intracavity face-cooling using a silicon carbide (SiC) prism.
  • To achieve coating-free laser operation through total internal reflection (TIR) and Brewster's angles.

Main Methods:

  • Bonding an optical-quality SiC prism to the Yb:YAG gain medium for face-cooling.
  • Designing a V-bounce cavity configuration utilizing TIR at refractive index interfaces.

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  • Employing Brewster's angles for all intracavity beam interactions.

    • Main Results:

    • Achieved approximately 38% slope efficiency.
    • Demonstrated 12 W of quasi-continuous-wave (Q-CW) output power at 1030 nm.
    • Measured a beam quality of M(2) = 1.5.
    • Successfully operated without any intracavity optical coatings.

    Conclusions:

    • This novel design enables efficient double-sided room-temperature heatsinking for thin disk lasers.
    • The TIR and Brewster's angle approach eliminates the need for intracavity coatings.
    • This work presents a viable path for advanced, high-performance thin disk laser architectures.