Abstract
With the development of lasers, self-trapping and self-focusing of intense light due to the intensity-dependent change in the refractive index of certain media was predicted [1]. For a medium with a sufficiently large, negative Kerr coefficient (n2), self-focusing of the incident light takes place when the power exceeds a critical value [2]. For cw and short pulse regimes (~100fs) the phenomenon is well modelled by the Nonlinear Schrödinger equation (NLS):
© 2013 IEEE
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