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    Area of Science:

    • Nonlinear optics
    • Waveguide physics
    • Photonics

    Background:

    • Soliton dynamics are typically observed in specific dispersion regimes.
    • Waveguides with zero-dispersion and zero-nonlinearity points offer unique optical properties.
    • Negative nonlinearity can support soliton formation even in normal dispersion domains.

    Purpose of the Study:

    • To investigate the behavior of incoherently coupled two-frequency pulse compounds in waveguides with single zero-dispersion and zero-nonlinearity points.
    • To explore the formation of nonlinear-photonics meta-atoms and molecule-like bound states.
    • To analyze the influence of the Raman effect on these pulse compounds.

    Main Methods:

    • Numerical simulations of pulse propagation in nonlinear waveguides.
    • Analysis of soliton dynamics under conditions of normal dispersion.
    • Investigation of pulse trapping and bound-state formation.

    Main Results:

    • Demonstrated trapping of weak pulses by solitary-wave wells, forming nonlinear-photonics meta-atoms.
    • Observed molecule-like bound states of two-frequency pulse compounds.
    • Found that the Raman effect can cause deceleration, acceleration, or no change in pulse compounds, depending on configuration.

    Conclusions:

    • Two-frequency pulse compounds exhibit unique behaviors in specialized waveguides.
    • Soliton dynamics are achievable in normal dispersion domains.
    • The Raman effect introduces complex dynamics to these pulse compounds, expanding their potential applications.