Optical Fiber Application for Temperature Monitoring of Cable Line State of Power Transmission Lines

The article considers the possibility of measuring the temperature of cable transmission lines with the help of specially manufactured narrowed quartz optical fiber. The study of technological processes of manufacturing of narrowed fibers with stable repeatability of parameters at their heating with a short non-adiabatic region of contraction is carried out. The device of laboratory installation for revealing the expansion of optical fiber under the influence of temperature is considered. The influence of temperature on the laser beam deflection in the created quartz single-mode fiber is investigated. Using the considered technology, fiber optic sensors not only for temperature but also for other physical quantities such as refractive index, vibration, and electric field can be fabricated for use as sensing elements.