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nlin.PS2001★ 56 cited
Generation of lattice structures of optical vortices
Alexander Dreischuh, Sotir Chervenkov, Dragomir Neshev +2
We demonstrate experimentally the generation of square and hexagonal lattices of optical vortices and reveal their propagation in a saturable nonlinear medium. If the topological c…
nlin.PS2000
Ring dark solitary waves: experiment versus theory
A. Dreischuh, D. Neshev, G. G. Paulus +2
Theoretical and experimental results on optical ring dark solitary waves are presented, emphasizing the interplay between initial dark beam contrast, phase-shift magnitude, backgro…