Abstract

We show that the nonlinear equation that describes nonparaxial Kerr propagation, together with the already reported bright-soliton solutions, admits of 1+1D dark-soliton solutions. Unlike their paraxial counterparts, dark solitons can be excited only if their asymptotic normalized intensity u2 is below 3/7; their width becomes constant when u2 approaches this value.

© 2005 Optical Society of America

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