Stable nonlinear amplification of solitons without gain saturation

Details Stable nonlinear amplification of solitons without gain saturation Stable nonlinear amplification of solitons without gain saturation

2012-01-10

arxiv.org/abs/1201.2095v1

Physics

Optics

EPL, in press

Scientific paper

We demonstrate that the cubic gain applied in a localized region, which is embedded into a bulk waveguide with the cubic-quintic nonlinearity and uniform linear losses, supports stable spatial solitons in the absence of the quintic dissipation. The system, featuring the bistability between the solitons and zero state (which are separated by a family of unstable solitons), may be used as a nonlinear amplifier for optical and plasmonic solitons, which, on the contrary to previously known settings, does not require gain saturation. The results are obtained in an analytical form and corroborated by the numerical analysis.

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