Electroluminescent optical fiber sensor for detection of a high intensity electric field

On-line testing of high-power electromagnetic devices is one of the most important problems of modern industrial metrology. In the paper, the results of experimental investigations of an electric field optical fiber sensor based on electroluminescent phenomena are presented. The electroluminescent effect is observed in some composite semiconductors, among others in zinc sulfide ZnS crystals. In our investigations, the used ZnS crystal was doped with copper Cu atoms as activators. The concentration of an activator in the ZnS crystal was about 5.10(-4) [g/g]. According to the plans of investigations of the elaborated electroluminescent sensor, spectral properties as well as the intensity of light emission in the sinusoidal alternating electric field were tested.