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    We developed a novel two-dimensional solid-state laser array for high-peak-power applications. This integrated laser system offers high brightness and burst-mode capabilities, advancing remote sensing and micromachining technologies.

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    Area of Science:

    • Photonics and Laser Technology
    • Materials Science

    Background:

    • Compact, high-peak-power nanosecond pulse lasers are crucial for remote sensing and micromachining.
    • Existing electrically modulated laser diodes face limitations in peak power, brightness, and size.

    Purpose of the Study:

    • To demonstrate the first high-peak-power two-dimensional (2D) solid-state laser array.
    • To overcome trade-offs in current laser diode technologies for applications like LiDAR.

    Main Methods:

    • Direct optical coupling and precision alignment of a vertical-cavity surface-emitting laser (VCSEL) array, Nd3+:YVO4 crystal, Cr4+:YAG saturable absorber, and output coupler.
    • Utilized a 2x2 mm2 array configuration for integrated laser generation.

    Main Results:

    • Achieved linearly polarized 1 µm laser pulses with 65.20 µJ single-pulse energy and 3.41 kW peak power.
    • Demonstrated a brightness of 74.79 MW·cm-2·sr-1.
    • Enabled burst-mode pulse generation with up to 0.38 mJ pulse energy and 10.0% optical conversion efficiency.

    Conclusions:

    • The developed 2D laser array provides an integrated solution for high-brightness, high-peak-power nanosecond pulses.
    • This technology holds significant potential for LiDAR, active remote sensing, and energy-intensive photonic applications.