Femtosecond filamentation in air and higher-order nonlinearities

Details Femtosecond filamentation in air and higher-order nonlinearities Femtosecond filamentation in air and higher-order nonlinearities

2010-03-24

arxiv.org/abs/1003.4727v1

Physics

Optics

3 pages, 3 figures

Scientific paper

According to a recent experiment, the instantaneous electronic Kerr effect in air exhibits a strong intensity dependence, the nonlinear refractive index switching sign and crossing over from a self-focusing to a de-focusing nonlinearity. A subsequent theoretical work has demonstrated that this has paradigm-changing consequences for the understanding of filamentation in air, so it is important to subject the idea of higher-order nonlinearities to stringent tests. Here we use numerical modeling to propose an experiment capable of discriminating between the standard and the new intensity-dependent Kerr-effect models.

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