The Investigation of Depending the Dispersion from Changes of the Optical Fibers Refractive Index Profile

in this paper, we investigate the dependence of the optical fiber dispersion on such factors of the change in the refractive index profile: the profile height, the core radius, the intermediate shell depth, and its width. To this end, mathematical models of the refractive index profiles of optical fibers have been developed. Step-wise approximation was used for the mathematical description of the profiles. An algorithm for studying the effect of a welded connection of a dispersion-modified optical fiber on the degree of variance change is proposed. The obtained results showed that the dispersion can increase significantly with a significant deviation of the refractive index profile from the initial form, which can lead to distortions of the transmitted signal.