Symbiotic solitary-wave attractor in backward quadratic nonlinear interaction
Service d'Optique et d'Acoustique, Université Libre de Bruxelles
50 Avenue F.D. Roosevelt, C.P. 194/5, B-1050 Brussels, Belgium
Accepted: 29 November 1998
Considering non-degenerate, backward quasi-phase matched parametric interaction in the presence of dissipation and dispersion, we show that quadratic media support a novel type of symbiotic solitary-wave attractor. We study the spontaneous generation of the new solitary waves and identify a velocity selection mechanism. The selected velocity depends on the injected continuous-pump intensity and can take any subluminous value (positive or negative). As a particular case, we point out a new mechanism of energy localization through the zero-velocity symbiotic solitary wave which is spontaneously generated from noise fluctuations.
PACS: 42.65.Tg – Optical solitons; nonlinear guided waves / 42.65.Yj – Optical parametric oscillators and amplifiers / 42.65.Re – Ultrafast processes; optical pulse generation and pulse compression
© EDP Sciences, 1999