Algorithm for estimation of material dispersion of fused silica glass optical fibers

Abstract

The simple algorithm for taking into account the material dispersion in the calculations of the dispersion characteristics of optical fibers is introduced. In contrast to known solutions based on an approximation of dependencies of Sellmeier coefficients from the impurity concentration the proposed version of algorithm is based on the linear approximation of dependencies of the refractive index of the impurity concentration. The offered algorithm for calculating of the spectral characteristics of chromatic dispersion was tested on the examples of optical fibers with step-index profile. As examples it was considered the optical fiber with a pure silica glass as cladding material and a GeO2 doped silica glass as material of core and the optical fiber with fluorine doped silica glass as cladding material and pure silica glass as material of core. The comparison of the experimental data with the theoretical curves obtained using known methods and the theoretical curves obtained using proposed algorithms are presented.