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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Indirectly LED-pumped Nd:glass regenerative amplifier.

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    Researchers developed the first LED-pumped neodymium-doped glass (Nd:glass) regenerative amplifier. This novel laser technology achieves 3.8 mJ pulse energy, paving the way for high-energy laser systems.

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    Area of Science:

    • Laser Physics
    • Optoelectronics
    • Materials Science

    Background:

    • Neodymium-doped glass (Nd:glass) lasers are crucial for high-energy applications.
    • Traditional pumping methods for regenerative amplifiers face limitations in scalability and efficiency.
    • Developing efficient and scalable pumping sources is essential for advancing laser technology.

    Purpose of the Study:

    • To demonstrate the first LED-pumped Nd:glass regenerative amplifier.
    • To evaluate the performance of indirect LED pumping for high-energy laser systems.
    • To explore the potential of luminescent concentrators in laser amplification.

    Main Methods:

    • Utilized a Ce:LuAG luminescent concentrator to absorb blue LED light.
    • Employed 3200 blue light-emitting diodes (LEDs) as the primary pump source.
    • Configured a Nd:glass regenerative amplifier to utilize the concentrated yellow light.

    Main Results:

    • Achieved 2 ns pulses at 1053 nm with 3.8 mJ energy.
    • Operated the amplifier at a repetition rate of 2 Hz.
    • Generated 3.4 kW of optical peak power in the yellow spectral range from the luminescent concentrator.

    Conclusions:

    • The first LED-pumped Nd:glass regenerative amplifier was successfully demonstrated.
    • Indirect LED pumping via luminescent concentrators offers high power-scaling potential.
    • This technology shows promise for future high-energy Nd:glass laser chains.