Two-color bright solitons in a three-level atomic system in the cascade configuration

Abstract

We investigate two-component spatial optical solitons in a cascaded three-level atomic system. We derive an existence curve in the parameter space of power and spatial widths that reveals the existence of a plethora of coupled solitons. These solitons can exist with two different frequencies and also with two different widths. Our analytical results have been verified by direct numerical simulations. Stability analysis confirms that these solitons are stable.

Keywords:

• nonlinear optics
• soliton
• atomic system
• Gaussian approximation
• beam dynamics

Acknowledgements

Part of this work was done under the framework of Senior Associate scheme of the Abdus Salam International Center for Theoretical Physics (ICTP), Italy. S. Konar thanks ICTP for the warm hospitality extended under the aforementioned scheme. SK also acknowledges the hospitality extended by the School of Physical, Environmental and Mathematical Sciences, University of New South Wales at ADFA, Canberra, Australia.