8 May 2018 Nonlinear chirped soliton: self-formation at Gaussian pulse propagation in a medium with non-instantaneous nonlinear response
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Abstract
Non-instantaneous nonlinear medium response is a widespread case for a propagation of laser pulse with femtosecond duration. It occurs if a femtosecond pulse propagates in fused silica or in air at sufficient high incident intensity, or in a medium, containing nanoparticles, for example. The last propagation case is very important for practical application at developing of all-optical multi-dimensional devices for data storage. As a rule, such femtosecond laser pulse propagation is accompanied by nonlinear non-stationary absorption. In the media with nonlinear non-stationary absorption a self-similar mode of a femtosecond pulse propagation is of great interest because of its spectrum unchanging at the distances up to several dispersion lengths at least. In our report we predict and investigate a novel type of solitons (or similariton) - nonlinear chirped solitons - formation if a nonlinear absorption and/or nonlinear refraction of the laser pulse occurs. This type of solitons is characterized by a nonlinear complicated frequency chirp and can possess an asymmetric pulse shape.
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Vyacheslav A. Trofimov, Vyacheslav A. Trofimov, Tatiana M. Lysak, Tatiana M. Lysak, Irina G. Zakharova, Irina G. Zakharova, "Nonlinear chirped soliton: self-formation at Gaussian pulse propagation in a medium with non-instantaneous nonlinear response", Proc. SPIE 10638, Ultrafast Bandgap Photonics III, 106380Y (8 May 2018); doi: 10.1117/12.2301143; https://doi.org/10.1117/12.2301143
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