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Few-cycle pulse retrieval using amplitude swing technique.

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    This summary is machine-generated.

    The amplitude swing technique reliably characterizes ultrashort laser pulses, even those stretched up to 15 times. This method accurately measures few-cycle pulses, validated by d-scan, with limitations only from optical element properties.

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    Area of Science:

    • Optics and Photonics
    • Ultrafast Laser Science

    Background:

    • Ultrashort pulses are crucial in diverse scientific fields.
    • Characterizing these pulses, especially in the few-cycle regime, is challenging.

    Purpose of the Study:

    • To demonstrate the amplitude swing technique as a robust method for characterizing few-cycle ultrashort pulses.
    • To analyze compressed and chirped pulses from a Ti:Sapphire laser oscillator.

    Main Methods:

    • Utilized the amplitude swing technique to analyze ultrashort pulses.
    • Employed a Ti:Sapphire laser oscillator to generate compressed and chirped pulses.
    • Validated results using the d-scan technique.

    Main Results:

    • Measured pulse duration at best compression was 5.98 fs (2.2 cycles).
    • Chirped pulses were temporally stretched up to 15 times.
    • Excellent agreement was found between the amplitude swing technique and d-scan.

    Conclusions:

    • The amplitude swing technique effectively measures ultra-broadband pulses in the few-cycle regime.
    • The technique performs well even for pulses far from optimum compression.
    • Performance is limited only by the transparency and birefringence of optical elements.