Method for magneto-optical current measurements

摘要

A method is described for magneto-optical current measurements using a linearly polarized light beam in which the light beam is alternatingly polarized by polarization modulation at a given frequency in two orthogonal directions and the intensities of two signals corresponding to the two states of polarization are picked up sequentially at the frequency of the modulating signal and are processed simultaneously, eliminating the noise component of the measurement signal. The method is particularly useful for the measurement of currents in high voltage systems.