Investigation of effect shifting normalized cutoff frequency of a round light guide with negative profile volume

Abstract

In the submitted research was probed a cutoff frequency shift for fundamental mode of a round lightguide with complicate refractive index profile and negative profile volume. The analysis of a electrodynamic characteristics of round lightguide is used for calculation by the stratification method. The dependence of a cutoff frequency shift of the HE/sub 11/ and TE/sub 01/-modes from profile parameters is explored. The influence of the index profile shape on a single-mode range is appreciated. The W-similar profile and profile with two depressed layers were analysed.