Patent ID: 6630819
Filing Date: 2003-10-07
Classification: G01R

Abstract:
An optical current transducer configured to sense current in a conductor, comprising:a single light source supplying light with at least a first, a second, and a third wavelength; a polarizer configured to generate linearly polarized light received from the light source; a sensor head, the sensor head including, a magneto-optic garnet comprising Bismuth (Bi), Iron (Fe), and Oxygen (O), configured to be coupled to the conductor and in optical communication with the polarizer, the magneto-optic garnet configured to rotate the polarization of the linearly polarized light received from the polarizer and an analyzer in optical communication with the magneto-optic garnet, the analyzer configured to detect the rotation of the linearly polarized light caused by the magneto-optic garnet; and a temperature compensation system configured to provide temperature compensation of the sensor head, based on light intensities of the first, the second, and the third wavelengths.