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    We developed a new method for measuring ultrashort laser pulse properties in space and time. This technique, transient grating single-shot supercontinuum spectral interferometry (TG-SSSI), is ideal for pulses with complex structures.

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    Area of Science:

    • Ultrafast optics
    • Laser science
    • Nonlinear optics

    Background:

    • Characterizing ultrashort laser pulses is crucial for understanding light-matter interactions.
    • Existing methods may struggle with complex pulse structures like spatiotemporal singularities.

    Purpose of the Study:

    • To present a novel single-shot technique for measuring the spatiotemporal amplitude and phase of ultrashort laser pulses.
    • To demonstrate the technique's capability in imaging pulses with spatiotemporal optical vortices.

    Main Methods:

    • Development and application of transient grating single-shot supercontinuum spectral interferometry (TG-SSSI).
    • Single-shot measurement of 1D space+time amplitude and phase.

    Main Results:

    • Successful space-time imaging of ultrashort laser pulses carrying spatiotemporal optical vortices.
    • Demonstration of TG-SSSI's effectiveness for complex pulse characterization.

    Conclusions:

    • TG-SSSI is a powerful tool for single-shot spatiotemporal characterization of ultrashort laser pulses.
    • The method is particularly suitable for pulses with singularities in spin/orbital angular momentum or polarization.