Reactive Current Sensor Based on Fiber Bragg Grating and a Piezo-Electric Transducer

This paper demonstrates an optical fiber sensor using fiber Bragg grating (FBG) and a piezo-electrical transducer (PZT) to measure reactive current. Mounting an FBG on a PZT bar, a dynamic strain simulator was constructed. The equivalent voltage produced by reactive current applied on PZT was converted to the dynamic variation of the FBG Bragg wavelength. The reactive current will be achieved by measuring the changing value of the wavelength. Thus, the sensor can be used to measure reactive current without the use of a traditional current meter.