A classification of optical fibers types on the characteristics of the Mandelstam — Brillouin backscatter spectrum

The values of Brillouin frequency shifts for various types of optical fibers at room temperature and without longitudinal tensile force are analyzed in this work. The results of experimental examinations of optical fiber characteristics which were exposed to external influences are shown. The program for automatic determination of fiber type by re-flectogram is presented. The database of profiles of the Mandelstam - Brillouin backscatter spectrums for fibers of different kinds and manufacturers allow to classify the optical fibers in the optical cables and detect damaged sections of fiber optical communication line. The work was performed with the financial support of the Ministry of Education and Science of the Russian Federation within the scope of the base part of a State Assignment within the sphere of scientific activity (Project No. 8.9334.2017/8.9).