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    This study presents a compact 2.4 GHz Kerr-lens mode-locked laser using Yb:Y2O3 ceramic. The portable, low-noise laser offers excellent stability and low power consumption, making it ideal for various applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Mode-locked lasers are crucial for precise timing applications.
    • Miniaturization and stability are key challenges in laser development.

    Purpose of the Study:

    • To develop a compact, stable, and low-noise Kerr-lens mode-locked laser.
    • To demonstrate the effectiveness of Yb:Y2O3 ceramic in a miniaturized laser system.

    Main Methods:

    • Utilized Ytterbium-doped Yttrium Oxide (Yb:Y2O3) ceramic as the gain medium.
    • Integrated all optical components into a 61 mL volume with optimized pump structure.
    • Implemented effective temperature control for enhanced stability.

    Main Results:

    • Achieved a compact laser volume of 61 mL within a 34 × 78 mm2 area.
    • Demonstrated low repetition-rate drift (∼10⁻⁸) and 13 fs timing jitter due to temperature control.
    • Reported low electrical power consumption (4 W) and 0.4% relative power stability over 2 hours.
    • Laser operates at 1075 nm with an 11.2 nm spectral width.

    Conclusions:

    • The developed laser is a portable, low-noise signal source suitable for demanding applications.
    • Yb:Y2O3 ceramic is a viable gain medium for compact, high-performance mode-locked lasers.
    • Effective thermal management is critical for achieving high stability in miniaturized laser systems.