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High-quality wavefront control in high-energy laser using a robust dual-deformable-mirror adaptive optics system.

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    Summary

    A new adaptive optics system significantly improved the beam quality of high-energy diode-pumped solid-state lasers (DPSSLs). This innovation enhances laser performance for demanding scientific and industrial applications.

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    Area of Science:

    • Lasers and Optics
    • Materials Science

    Background:

    • High-repetition-rate nanosecond pulsed diode-pumped solid-state lasers (DPSSLs) are crucial for scientific and industrial uses.
    • A compact 10 J DPSSL system exhibited limited beam quality at room temperature.

    Purpose of the Study:

    • To enhance the beam quality of a DPSSL system.
    • To develop a robust and practical adaptive optics (AO) control method for multiple deformable mirrors (DMs).

    Main Methods:

    • Implementation of a dual-deformable-mirror (DM) adaptive optics (AO) system.
    • Development of a successive trust-region iterative method for collaborative DM control.
    • Experimental validation on a 100 Hz, 10 J DPSSL system.

    Main Results:

    • Achieved a beam quality of approximately 2.2/1.8 times the diffraction limit (X/Y).
    • Reduced wavefront distortion by over an order of magnitude.
    • Increased peak energy density by more than 17-fold.

    Conclusions:

    • The developed multi-DM AO system and control method significantly improve DPSSL beam quality.
    • The control approach is stable, robust, and facilitates rapid deployment.
    • This framework supports high-beam-quality applications in high-energy laser systems and optical platforms.