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We study the second-harmonic generation and localization of light in a reconfigurable waveguide induced by an optical vortex soliton in a defocusing Kerr medium. We show that the vortex-induced waveguide greatly improves conversion efficiency from the fundamental to the second harmonic field.doi:10.1364/ol.29.000593 pmid:15035481 fatcat:xiu3pesymfdnhhduund4gkumgu