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Dispersive wave emission from wave breaking.

Matteo Conforti, Stefano Trillo

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    Summary
    This summary is machine-generated.

    Pulses breaking in nonlinear fibers radiate energy due to phase-matching. This explains recent observations of radiation from normal dispersion pulses.

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    Area of Science:

    • Nonlinear optics
    • Fiber optics
    • Wave propagation

    Background:

    • Pulses in nonlinear fibers can undergo wave breaking.
    • Radiation from such events in the normal dispersion regime was recently observed.
    • The underlying mechanism for this radiation was not fully understood.

    Purpose of the Study:

    • To theoretically explain the radiation emitted from wave breaking pulses in nonlinear weakly dispersive fibers.
    • To elucidate the role of phase-matching and higher-order dispersion in this phenomenon.

    Main Methods:

    • Theoretical analysis of pulse propagation in nonlinear weakly dispersive fibers.
    • Investigation of phase-matching conditions involving linear dispersive waves and shock-wave fronts.
    • Inclusion of higher-order dispersion effects in the theoretical model.

    Main Results:

    • Demonstrated that wave breaking pulses in nonlinear weakly dispersive fibers radiate energy.
    • Identified phase-matching, assisted by higher-order dispersion, as the mechanism for radiation.
    • The theoretical findings align perfectly with recent experimental observations.

    Conclusions:

    • The radiation observed from pulses in the normal dispersion regime is explained by the phase-matching of dispersive waves with the shock-wave front.
    • Higher-order dispersion plays a crucial role in enabling this phase-matching and subsequent radiation.
    • This work provides a theoretical foundation for understanding radiation phenomena in nonlinear fiber optics.