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Optical fiber electric field intensity sensor

In this paper the results of the experimental investigation of fiber optic electric field intensity sensor are presented. These sensors are based on electroluminescent effect which consists in the light emission by some substances placed in variable electric field. The luminescent effect is observed in some composite semiconductors, among other - ZnS, doped by Mn, for high its concentration, order 10-4 - 10-3 g/g. The final aim of this investigation will be the elaboration of an electric intensity sensor, which together fiber optic temperature sensor and intensive of magnetic field sensor make possible, in the future, to monitor the state of work of electromagnetic power arrangements, first of all - high voltage power transformers.