Nonlinear Waves and Turbulence in Photonics 2022 - Abstract

Amiranashvili, Shalva

Unusual ways of four-wave mixing instability

A pump carrier wave in a nonlineaar dispersive system may decay by giving birth to blue- and red-shifted satellite waves due to modulation or four-wave mixing instability. We analyse situations where the satellites are so different from the carrier wave, that the red-shifted satellite either changes its propagation direction or even gets a negative frequency. Both situations are beyond the envelope approach and require application of Maxwell equations.