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High-power continuous-wave self-frequency-doubled monolithic laser.

Jinheng Du, Xiufang Chen, Haohai Yu

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    Researchers developed a high-power self-frequency-doubled (SFD) laser, achieving 21.6 W output at 510 nm. This compact, efficient SFD laser offers promising applications in various scientific and medical fields.

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    Area of Science:

    • Laser Physics
    • Materials Science
    • Nonlinear Optics

    Background:

    • Self-frequency-doubled (SFD) lasers combine laser oscillation and nonlinear frequency conversion in a single crystal.
    • Yb:YCa4O(BO3)3 (Yb:YCOB) is a promising material for SFD lasers due to its favorable spectroscopic properties.

    Purpose of the Study:

    • To develop a high-power, compact SFD laser using Yb:YCOB.
    • To optimize the SFD laser performance by minimizing reabsorption and enhancing quantum efficiency.

    Main Methods:

    • Employed a monolithic configuration for the Yb:YCOB SFD laser with a short oscillator length (6 mm).
    • Utilized optimized crystal properties to reduce reabsorption losses.
    • Focused on increasing quantum efficiency for improved power output.

    Main Results:

    • Achieved a continuous-wave output power of 21.6 W at approximately 510 nm.
    • Obtained a high optical conversion efficiency of 19.0%.
    • Demonstrated the highest output power reported for an SFD laser to date.

    Conclusions:

    • The developed monolithic SFD Yb:YCOB laser represents a significant advancement in high-power laser technology.
    • The compact structure and high efficiency make it suitable for diverse applications.
    • Potential applications include laser display, medical treatments, spectral analysis, and scientific research.