Two-color pulse compounds in waveguides with a zero-nonlinearity point

We study incoherently coupled two-frequency pulse com-pounds in waveguides with single zero-dispersion and zero-nonlinearity points. In such waveguides, supported by a negative nonlinearity, soliton dynamics can be obtained even in domains of normal dispersion. We demonstrate trapping of weak pulses by solitary-wave wells, forming nonlinear-photonics meta-atoms, and molecule-like bound -states of pulses. We study the impact of the Raman effect on these pulse compounds, finding that, depending on the precise subpulse configuration, they decelerate, accelerate, or are completely unaffected. Our results extend the range of systems in which two-frequency pulse compounds can be expected to exist and demonstrate further unique and unexpected behavior. (c) 2023 Optica Publishing Group

Automated summary

We investigate incoherently coupled two-frequency pulse compounds in waveguides with single zero-dispersion and zero-nonlinearity points. Soliton dynamics can be achieved in these waveguides, supported by negative nonlinearity, even in regions of normal dispersion. We demonstrate the trapping of weak pulses by solitary-wave wells, forming nonlinear-photonics meta-atoms and molecule-like bound states of pulses. The impact of the Raman effect on these pulse compounds is studied, revealing variable deceleration, acceleration, or no effect depending on the specific subpulse configuration. Our findings expand the range of systems in which two-frequency pulse compounds can exist and demonstrate additional unique and unexpected behavior.