Abstract: System for monitoring high-tension cables in air stretches as well as a use of the same. The system comprises at least one optic fiber fastened to the high tension cable, the optic fiber including at least one Bragg grating with known reflection characteristics, a light source for emitting light within a known range of wavelengths into the optic fiber, and measuring devices for detection of light reflected from the Bragg grating in the fiber and for recognizing light reflected from each Bragg grating based on their known reflection characteristics.