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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Generation of programmable GHz burst-mode ultrashort pulses using free-space angular-chirp-enhanced delay.

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    Researchers developed a method to generate programmable GHz burst-mode ultrashort pulses from lower repetition rate sources. This technique offers flexible control over pulse characteristics for advanced applications.

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    Area of Science:

    • Optics and Photonics
    • Ultrafast Lasers

    Background:

    • Existing ultrashort pulse sources often operate at lower repetition rates (kHz-MHz).
    • Generating high-repetition-rate (GHz) pulse bursts with controlled patterns is challenging.

    Purpose of the Study:

    • To propose a novel method for generating programmable GHz burst-mode ultrashort pulses.
    • To enable flexible control over pulse number, intensity patterns, intra-pulse repetition rate, and time delay.

    Main Methods:

    • Utilized an acousto-optic deflector (AOD) with radio-frequency programmability.
    • Employed a free-space angular-chirp-enhanced delay (FACED) system with non-parallel mirrors.
    • Integrated AOD programmability with FACED's angular reflection conditions for pulse splitting.

    Main Results:

    • Successfully generated programmable GHz burst-mode ultrashort pulses.
    • Demonstrated flexible control over burst parameters including pulse count and intensity.
    • Achieved real-time programming of pulse burst characteristics.

    Conclusions:

    • The developed method provides a versatile platform for generating GHz ultrashort pulse bursts.
    • This technique is suitable for applications in material processing and nonlinear imaging.
    • Offers a new approach to enhance the capabilities of existing ultrashort pulse lasers.