We analyze dark solitons supported by second-order parametric interactions between the fundamental and second harmonics in the presence of dispersion and group-velocity mismatch. We reveal various types of solitary waves, including a family of two-wave dark solitons propagating on a modulationally stable background, dark solitons with nonmonotonic tails, and bound states of dark solitons.
© 1995 Optical Society of America
Alexander V. Buryak and Yuri S. Kivshar, "Dark solitons in dispersive quadratic media," Opt. Lett. 20, 834-836 (1995)