The effect of phase-matched third-harmonic generation on the structure and stability of spatial solitary waves is investigated. A power threshold for the existence of two-frequency spatial solitons is found, and the multistability of solitary waves in a Kerr medium owing to a higher-order nonlinear phase shift caused by cascaded third-order processes is revealed.
© 1997 Optical Society of America
Rowland A. Sammut, Alexander V. Buryak, and Yuri S. Kivshar, "Modification of solitary waves by third-harmonic generation," Opt. Lett. 22, 1385-1387 (1997)