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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 17, Iss. 4 — Apr. 1, 2000
  • pp: 507–513

Transformation of a dark soliton into a bright pulse

Boris A. Malomed, Amir Mostofi, and Pak L. Chu  »View Author Affiliations

JOSA B, Vol. 17, Issue 4, pp. 507-513 (2000)

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We consider a system of cubic complex Ginzburg–Landau equations governing copropagation of two waves with opposite signs of the dispersion in a nonlinear optical fiber in the presence of gain and losses. The waves are coupled by cross-phase modulation and stimulated Raman scattering. A special exact solution for a bound state of bright and dark solitons is found (unlike the well-known exact dark-soliton solution to the single complex Ginzburg–Landau equation, which is a sink, this compound soliton proves to be a source emitting traveling waves). Numerical simulations reveal that the compound soliton remains stable over ∼10 soliton periods. Next, we demonstrate that a very weak seed noise, added to an initial state in the form of a dark soliton in the normal-dispersion mode and nothing in the anomalous-dispersion one, gives rise to a process of the generation of a bright pulse in the latter mode, while the dark soliton gets grayer and eventually disappears. Thus this scheme can be used for an effective transformation of a dark soliton into a bright one, which is of interest by itself and may also find applications in photonics.

© 2000 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(190.0190) Nonlinear optics : Nonlinear optics
(190.5650) Nonlinear optics : Raman effect

Boris A. Malomed, Amir Mostofi, and Pak L. Chu, "Transformation of a dark soliton into a bright pulse," J. Opt. Soc. Am. B 17, 507-513 (2000)

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