Common-mode optical noise rejection scheme for an extrinsic Faraday current sensor

Summary form only given. The fiber-links used to interrogate optical current sensors utilizing the Faraday effect are prone to vibrational effects, which can corrupt the optically encoded Faraday signal with induced optical noise. This corruption can be further exacerbated if the fiber leads are carried to ground using semi-rigid light-weight insulators. To overcome these problems we have developed a common-mode noise rejection (CMR) scheme, which can compensate for these effects even at very high vibration levels.