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Efficient Nd:YAG crystal laser with rotatory pumping.

Yuefei Li, Bo Zhang, Weilin Cao

    Optics Express
    |January 5, 2024
    PubMed
    Summary
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    Rotatory pumping reduces thermal issues in solid-state lasers. This efficient method achieved 25.7 W power and 41.5% slope efficiency in a Nd:YAG laser, promising for power scaling.

    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Laser Physics

    Background:

    • Thermal effects in the gain medium limit solid-state laser performance.
    • Efficient heat dissipation is crucial for high-power laser operation.

    Purpose of the Study:

    • To investigate rotatory pumping for efficient continuous-wave Nd:YAG solid-state laser operation.
    • To alleviate thermal accumulation in the gain medium using a novel pumping scheme.

    Main Methods:

    • Implementation of a short-cavity continuous-wave 1064 nm Nd:YAG laser.
    • Utilized a rotatory pumping scheme with varying pump rotation radius and rates.
    • Analyzed the influence of rotatory pumping parameters on laser performance.

    Main Results:

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    • Achieved a maximum laser power of 25.7 W.
    • Obtained a slope efficiency of 41.5% at a 10.0-mm pump rotation radius.
    • Identified an optimum rotation rate of 2300 rpm for efficient operation.

    Conclusions:

    • Rotatory pumping is a promising technique for mitigating thermal effects.
    • This method facilitates power scaling of solid-state lasers.
    • Optimized parameters enable high-efficiency, high-power laser output.