Magneto-optical ac current sensing with an annealed fiber coil and intrinsic temperature compensation

Peter Menke; Thomas Bosselmann

doi:10.1117/12.191839

1 November 1994 Magneto-optical ac-current sensing with an annealed fiber coil and intrinsic temperature compensation

Peter Menke, Thomas Bosselmann

Proceedings Volume 2292, Fiber Optic and Laser Sensors XII; (1994) https://doi.org/10.1117/12.191839
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Optical current sensors using the Faraday effect promise significant advantages over conventional current transformers. One of the remaining problems is the temperature dependence of the optical current measurement mainly caused by intrinsic or stress induced linear birefringence. By an appropriate annealing process most of the linear birefringence in a fiber coil can be removed. But still a significant temperature drift remains. For AC measurements we have developed a novel compensation method, which uses the DC part of the output signal to compensate the temperature drift. We have achieved a reduction in temperature sensitivity by a factor of 8 to about 0.5% over a temperature range from room temperature to 80 degree(s)C. The overall accuracy of the current sensor is now limited only by the system's noise and stability.

Citation Download Citation

Peter Menke and Thomas Bosselmann "Magneto-optical ac-current sensing with an annealed fiber coil and intrinsic temperature compensation", Proc. SPIE 2292, Fiber Optic and Laser Sensors XII, (1 November 1994); https://doi.org/10.1117/12.191839

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