Stable bright and vortex solitons in photonic crystal fibers with inhomogeneous defocusing nonlinearity Lobanov, Valery E. ; Borovkova, Olga V. ; Kartashov, Yaroslav V. ; Malomed, Boris A. ; Torner, Lluis Abstract Publication: Optics Letters Pub Date: June 2012 DOI: 10.1364/OL.37.001799 Bibcode: 2012OptL...37.1799L