METHOD FOR MEASURING EXCESS LENGTH OF OPTICAL FIBER IN AN OPTICAL CABLE MODULE Russian patent published in 2021 - IPC H04B10/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and can be used to measure the excess length of an optical fiber in an optical cable module. To achieve the effect, the polarization characteristic of the backscattered optical fiber is measured and stored in the optical cable module, the measured backscattering characteristic of the optical fiber is divided into identical sections, for each k-th section, an estimate of the beat length of the optical fiber is determined from these characteristics, and the excess length of the optical fiber in the module is calculated optical cable in the k-th section , while measuring the polarization characteristics of the backscattering of the optical fiber at two wavelengths and , memorizing them, after which each of these characteristics of the backscattering of the optical fiber is divided into identical sections, for each k-th section according to these characteristics, estimates of the beat length of the optical fiber are determined for two wavelengths and and the excess length of the optical fiber in the optical cable module at the k-th section is calculated.

EFFECT: elimination of measurement errors introduced due to twisting of optical fibers.

1 cl, 1 dwg