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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Er:YAG MOPA system based on a polarization-multiplexing 4-pass structure.

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    This summary is machine-generated.

    A novel 4-pass structure for Erbium-doped Yttrium Aluminum Garnet (Er:YAG) MOPA systems significantly enhances amplification performance. This design improves power stability and beam quality for the 1645 nm laser system.

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    Area of Science:

    • Laser Physics
    • Optical Engineering

    Background:

    • MOPA systems require efficient amplification.
    • Er:YAG lasers are utilized for specific wavelength applications.

    Purpose of the Study:

    • To investigate a 4-pass structure for an Er:YAG MOPA system.
    • To enhance amplification performance at 1645 nm.

    Main Methods:

    • Theoretical analysis of a 4-pass gain medium.
    • Experimental setup of the Er:YAG MOPA system.
    • Measurement of amplification gain, power fluctuation, and beam quality.

    Main Results:

    • The 4-pass structure demonstrated improved amplification.
    • A highest gain of approximately 4 was achieved.
    • Reduced power fluctuation and enhanced beam quality were observed.

    Conclusions:

    • The 4-pass design is effective for Er:YAG MOPA systems.
    • This configuration offers superior performance compared to conventional designs.
    • The study validates the theoretical predictions for the 4-pass structure.