Regular paper

Applied Physics B

, Volume 69, Issue 2, pp 107-111

First online:

Quasi-two-dimensional dark spatial solitons and generation of mixed phase dislocations

  • A. DreischuhAffiliated withMPI für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany (Fax: +49-89/329-050, E-mail: ggp@mpq.mpg.de)
  • , G.G. PaulusAffiliated withMPI für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany (Fax: +49-89/329-050, E-mail: ggp@mpq.mpg.de)
  • , F. ZacherAffiliated withMPI für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany (Fax: +49-89/329-050, E-mail: ggp@mpq.mpg.de)

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Abstract.

This paper presents experimental evidence that orthogonally crossed dark soliton stripes form quasi-two-dimensional spatial solitons with a soliton constant equal to that of singly charged optical vortices. Besides the pairs of oppositely charged optical vortex solitons, the snake instability of the dark formation at moderate saturation is found to lead to generation of steering mixed edge–screw phase dislocations with zero total topological charges.

PACS: 42.65; 42.65.Tg; 42.65.Sf