Self-trapped elliptical super-Gaussian beam in cubic–quintic media

We find self-trapped propagation of elliptical super-Gaussian beam in cubic–quintic nonlinear media. The soliton beam preserves its shape and size during propagation in Kerr media. Both defocusing and focusing quintic nonlinearities are considered. In a cubic (focusing)-quintic (defocusing) media br...

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Bibliographic Details
Published in:Optics communications 2014-12, Vol.332, p.311-320
Main Authors: Jana, Soumendu, Singh, Ajitpal, Porsezian, K., Mithun, T.
Format: Article
Language:English
Subjects:
Cubic–quintic nonlinearity
Elliptical super-Gaussian beam
Self-trapping
Spatial soliton
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Summary:We find self-trapped propagation of elliptical super-Gaussian beam in cubic–quintic nonlinear media. The soliton beam preserves its shape and size during propagation in Kerr media. Both defocusing and focusing quintic nonlinearities are considered. In a cubic (focusing)-quintic (defocusing) media breather like beam propagation with intriguing beam width oscillation is observed. The influence of beam ellipticity, super-Gaussian nature and quintic nonlinearity on self-trapping has been studied. A formula for critical power for self-focusing has been derived and it readily agrees with the results obtained by variational method. In Kerr and focusing quintic media beam collapse occurs quicker for higher order super-Gaussian beam. The critical power of self-focusing in defocusing (focusing) quintic medium prominently increases (decreases) with increasing strength of quintic nonlinearity. This variation rate is greater for higher order super Gaussian beam. A beam with greater ellipticity requires larger power for self-trapping.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2014.06.061