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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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148-W single-frequency Nd:YAG Innoslab μs-amplifier at 1064 nm with high efficiency.

Xuguang Zhang, Junzhi Ye, Xingwang Luo

    Optics Express
    |March 17, 2021
    PubMed
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    This study presents a novel single-frequency Nd:YAG Innoslab amplifier, achieving high output power and efficiency. It demonstrates a significant advancement in laser amplification technology for various applications.

    Area of Science:

    • Laser Physics
    • Materials Science

    Background:

    • High-power, single-frequency lasers are crucial for applications like precision machining and scientific research.
    • Developing efficient and compact laser amplifiers remains a key challenge in laser technology.

    Purpose of the Study:

    • To report the development and performance of a novel single-frequency quasi-continuous-wave partially pumped slab (Innoslab) amplifier.
    • To demonstrate high output power and optical-optical efficiency in a compact laser system.

    Main Methods:

    • Utilized a 1064 nm Nd:YAG Innoslab amplifier configuration.
    • Employed a quasi-continuous-wave, partially pumped slab design for efficient amplification.
    • Amplified a 4.4 W single-frequency seed laser.

    Main Results:

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    • Achieved a final output power of 148.1 W from the 4.4 W seed laser.
    • Demonstrated a high optical-optical efficiency of 30.4%.
    • Obtained output pulses of 141.4 μs duration at a 500 Hz repetition rate with excellent beam quality (M² < 1.41).

    Conclusions:

    • The developed single-frequency Nd:YAG Innoslab amplifier represents a significant breakthrough in high-power laser technology.
    • The high output power and efficiency achieved, combined with excellent beam quality, position this amplifier for advanced applications.
    • This work sets a new benchmark for single-frequency Innoslab amplifiers, validated by close agreement between experimental and simulation results.