Study of Bend Influences of Optical Fibers on Brillouin Reflectograms

The work constitutes a review of bend and micro-bend influences of optical fibers on Brillouin reflectograms obtained by the Brillouin reflectometer. Methods related to formation of unauthorized access to fiber optical communication lines are discussed. The issues of unauthorized access detection to fibers by reflectograms are examined. 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).