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Related Experiment Video

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Versatile, compact chirped pulse amplifier pump system for ultrafast optical parametric amplifiers.

Yannik Zobus, Christian Brabetz, Markus Loeser

    Optics Express
    |February 14, 2023
    PubMed
    Summary

    A new pump system for ultrafast optical parametric amplifiers (uOPA) was developed, delivering high-energy, stable pulses. This upgrade enhances laser systems for heavy ion and plasma experiments.

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    Area of Science:

    • Laser Physics
    • High-Energy Lasers
    • Nonlinear Optics

    Background:

    • Existing ultrafast optical parametric amplifiers (uOPA) require upgrades for enhanced performance.
    • High-power laser systems like PHELIX and PEnELOPE benefit from advanced pumping technologies.

    Purpose of the Study:

    • To develop and characterize a novel pump system for uOPA.
    • To provide a versatile and self-seedable pump module for advanced laser experiments.

    Main Methods:

    • Implementation of a two-stage chirped pulse amplifier centered around a Yb:YAG regenerative amplifier.
    • Utilizing second harmonic generation (SHG) for frequency conversion.
    • Incorporating a self-phase modulation stage for broad applicability.

    Main Results:

    • Achieved 92 mJ output energy at 1030 nm with 1.4 ps pulse duration and high beam quality (M²/1.02/1.16).
    • Demonstrated 70% SHG efficiency, yielding 43 mJ at 515 nm, limited by crystal damage threshold.
    • Obtained a relative energy stability of 0.35%.

    Conclusions:

    • The developed pump system offers a robust and efficient solution for uOPA.
    • The system's self-seedable nature and broad applicability reduce requirements on seed oscillators.
    • This advancement is crucial for upgrading existing and developing new high-energy laser facilities.