Аннотация:The necessity of improvement of metrological specifications and functional capabilities of the fiber-optic sensors for long distance measurements (more than 10 km) in real time is substantiated. Particular attention is paid to the implementation of long-term radiation situation control at high exposure doses of radiation. New method of building of high-speed communication line with fiber-optic sensor for controlling exposure dose of radioactive radiation in the large range of changes (several orders of magnitude) in real time is suggested. The limiting distance of operation of high-speed communication line with an optic sensor is determined. Functional capabilities of the developed high-speed fiber-optic sensor are identified. The obtained experimental results are presented. A forecast for its use in the environmental monitoring systems, etc. was made.