Title :
High-Dynamic and High-Precise Optical Current Measurement System Based on the Faraday Effect
Author :
Gerber, Dominic ; Biela, Juergen
Author_Institution :
Lab. for High Power Electron. Syst., ETH Zurich, Zurich, Switzerland
Abstract :
In this paper, a high-dynamic and high-precise optical current measurement system based on the Faraday effect is presented. First, the sensor concept is presented and different sensor constructions are analyzed. Then, a measurement system based on a rare-earth iron garnet film is investigated. The measurement system uses multiple signal processing channels to increase the signal-to-noise ratio. Furthermore, the measurement range exceeds a rotation of 180° and therefore requires a counting mechanism to count the number of rotations. Finally, the precision of the presented system is analyzed. The precision is determined to be 4.9 ppm at a rotation range of 3300°.
Keywords :
Faraday effect; electric current measurement; garnets; iron; optical films; optical sensors; optical variables measurement; signal processing; thin film sensors; Faraday effect; counting mechanism; multiple signal processing channel; optical current measurement system; rare-earth iron garnet film; sensor concept; signal-to-noise ratio; Current measurement; Faraday effect; Measurement by laser beam; Optical polarization; Optical sensors; Optical signal processing; Temperature measurement; Current measurement; Faraday effect; fiber optic sensor; fiber optic sensor.;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2015.2437395
