FIELD: measuring equipment, applicable for identification of a damaged optical fiber in monitoring systems of optical fibers in communication network.
SUBSTANCE: for identification of a damaged optical fiber the control characteristic of the backward scattering of the optical fiber is preliminary measured, it is memorized subsequently with a preset time interval, periodically measured the current characteristic of the backward scattering of the same fiber at the same parameters of sounding, and the damaged optical fiber is identified as a result of comparison of the control and current characteristics of the backward scattering of the optical fiber, the matrix is calculated at this time 
, where 
- the covariation matrix of the control and current characteristics of the backward scattering of the optical fiber, and 
- the dispersion of the control characteristic of the backward scattering, and the optical fiber is identified as a damaged-one at a deviation of even one of the members of matrix 
from unity by more than the preset threshold value.
EFFECT: provided enhanced sensitivity and reduced number of errors of identification of damaged optical fibers in the systems of automatic monitoring.
1 dwg
