Modulated vortex solitons of four-wave mixing Zhang, Yanpeng ; Nie, Zhiqiang ; Zhao, Yan ; Li, Changbiao ; Wang, Ruimin ; Si, Jinhai ; Xiao, Min Abstract Publication: Optics Express Pub Date: May 2010 DOI: 10.1364/OE.18.010963 Bibcode: 2010OExpr..1810963Z