We study the interaction of an optical vortex soliton with a dark-soliton s
tripe in a bulk nonlinear defocusing medium. We develop a multiscale asympt
otic theory to predict the main effect of the interaction and then study it
experimentally, observing vortex-induced stripe bending, development of th
e transverse instability, and stripe breakup. (C) 2000 Optical Society of A
merica. OCIS codes: 190.0190, 190.5530.