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Highly efficient pumping configuration for microchip solid-state laser.

T Dascalu, T Taira

    Optics Express
    |June 9, 2009
    PubMed
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    A novel edge-pumping geometry for solid-state microchip lasers improves thermal management and simplifies pump optics. This design achieves high pump absorption and efficient power output, with potential for further scaling.

    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Solid-state lasers are crucial for various applications.
    • Efficient thermal management and simplified pump optics are key challenges in microchip laser design.

    Purpose of the Study:

    • To introduce and evaluate a new edge-pumping geometry for solid-state microchip lasers.
    • To enhance thermal management and simplify pump optics while maintaining high pump absorption.

    Main Methods:

    • A thin-disk gain crystal with diffusion-bonded undoped material for pump light guiding.
    • Numerical simulations to assess pump radiation absorption and uniformity.
    • Experimental validation using an Yb:YAG/YAG composite device.

    Main Results:

    • Simulations show >0.95 pump radiation absorption and >0.95 uniformity coefficient.

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  • Experimental results yielded 34 W output power from 220 W pump power.
  • A slope efficiency of 0.26 was achieved.

    • Conclusions:

    • The new geometry offers effective thermal management and simplified optics for microchip lasers.
    • The design demonstrates high pump absorption and promising experimental output power.
    • Further power scaling possibilities exist for this laser configuration.