Vibration compensation technique for an optical current transducer

Pawel Niewczas; Andrew Cruden; W. Craig Michie; Iain W. Madden; James R. McDonald

doi:10.1117/1.602296

1 October 1999 Vibration compensation technique for an optical current transducer

Pawel Niewczas, Andrew Cruden, W. Craig Michie, Iain W. Madden, James R. McDonald

Optical Engineering, Vol. 38, Issue 10, (October 1999). https://doi.org/10.1117/1.602296

Details are presented on a technique for compensation of vibration-induced noise in an optical current transducer (OCT). The light intensity changes that result from vibration are reciprocal, i.e., their magnitude does not depend on the direction of light propagation. However, intensity changes that result from the Faraday rotation induced as the light travels through the OCT are dependent on the direction of propagation and hence, by using two counter-propagating beams, vibration- induced intensity noise can be canceled by applying simple signal processing. This solution also enables true dc current measurement to be made. The principles of operation of the compensation method an experimental evaluation of the system are presented and the limitations associated with the compensation scheme are discussed.

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Pawel Niewczas, Andrew Cruden, W. Craig Michie, Iain W. Madden, and James R. McDonald "Vibration compensation technique for an optical current transducer," Optical Engineering 38(10), (1 October 1999). https://doi.org/10.1117/1.602296

Published: 1 October 1999

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