The methods of excess fiber length measurement in loose-tube cable using optical time domain reflectometer are considered in this paper. The results of climatic tests for the construction length of a modular optical cable are presented. A method for estimating the excess length of an optical fiber via measurements of the fiber backscattering characteristics with a conventional optical reflectometer is proposed. A comparison of methods for determining the excess length of an optical fiber via estimating the bending loss is performed. The errors of line approximation of experimental curves related to excess fiber length dependency from temperature are used as error criterion. The error estimations of described methods are presented and conditions of their usage are considered.


Разработка: студия Green Art