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Burst-mode dual-comb spectroscopy.

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    We developed a new burst mode dual-comb spectroscopy (DCS) for faster, time-resolved measurements. This method simplifies transient event analysis, like laser-induced plasmas, with high acquisition rates.

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    Area of Science:

    • Spectroscopy
    • Laser Physics
    • Plasma Physics

    Background:

    • Dual-comb spectroscopy (DCS) is a powerful technique for high-resolution spectral analysis.
    • Traditional DCS methods can have limitations in acquisition speed for transient events.

    Purpose of the Study:

    • To introduce a novel
    • burst mode
    • modality of dual-comb spectroscopy (DCS).
    • To enable simplified and powerful time-resolved measurements with increased acquisition rates.
    • To demonstrate the application of this technique for analyzing laser-induced plasmas.

    Main Methods:

    • Multiplexing each probe pulse into a short train of pulses within the DCS system.
    • Acquiring transmission spectra of a laser-induced plasma using a single laser ablation shot.
    • Utilizing a spectral bandwidth of 3.1 THz.

    Main Results:

    • Achieved an effective acquisition rate of 25 kHz with 40 µs time resolution.
    • Identified 22 Neodymium (Nd) spectral lines not previously reported in the literature.
    • Successfully performed time-resolved absorption-based spectroscopic measurements.

    Conclusions:

    • The
    • burst mode
    • DCS offers a simplified and flexible approach for studying transient and low-duty-cycle events.
    • This technique is suitable for applications including laser-induced plasmas, combustion, and explosive reactions.
    • This modification enhances existing dual-comb systems for advanced transient event analysis.