We have shown that the stationary propcrties of TE guided waves in a slab optical waveguidewith a nonlinear Kerr-likc bounding medium can be described in a compact way bymeans of the usual normalized effective modal index (b) and a set of only four independent normalized parameters: the well-known normalized thickness (V) and asymmetry measure (a) of the waveguide, the generalized aspect ratio between film and substrate refractive indices and a new guided power measure. Allowed and forbidden regions in the{b, V,a}-space in order that a guided solution exists have been recognized and classified. As a further application or the normalized parameters, we focus on the cutoff properties of the TEo guided wave.

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