Vol. 184, Issue 1, January 2015, pp. 153-158

Abstract: A magneto-optic sensor is developed using a Terbium Doped Glass (TDG) element as a Faraday rotation sensor and optical fiber as light transmitting and receiving medium. Online LabView based application software is developed to process the sensor output. The system is used to sense the magnetic field of a DC motor field winding in industrial environment. The sensor output is compared with the magnetic flux density variation obtained with a calibrated Hall Magnetic sensor (Gauss Meter). A linear variation of sensor output over wide range of current passing through the field winding is obtained. Further the results show an improved sensitivity of magneto-optic sensor over the Hall sensor.

Keywords: Current measurement, Faraday effect, Magnetic field measurement, Magnetooptic devices, Magnetic sensors, Optical imaging, Polarimetry, Stokes parameters.

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