Non-linear propagation of Gaussian beams in planar graded-index waveguides: a variational approach (original) (raw)

Pure and Applied Optics: Journal of the European Optical Society Part A, 1995

Abstract

Gaussian beam propagation in planar GRIN waveguides with non-linear refractive index has been studied by means of the well known Anderson variational method, improved with a more general trial function. Analytical expressions for oscillations of both the beam waist and the centre of the beam have been derived. The solutions obtained yield a very simple picture of the behaviour of Gaussian light beams in this kind of media and are in excellent agreement with the numerical calculations presented.

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