Abstract

This paper analyzes the response of optical fiber current sensors that are subjected to high electric fields, such as fields encountered in gas-insulated systems. This paper shows that through the electrooptic (EO) Kerr effect, these fields can cause harmonic distortion of the measured ac current waveform. This harmonic distortion was confirmed experimentally. Also, this paper shows that it is possible to simultaneously measure both current and voltage waveforms and the phase between them using this effect. To minimize the electrooptic Kerr effect, optical fiber current sensors must be screened from high-electric fields.

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Appl. Opt. (2)

J. Lightwave Technol. (5)

S. X. Short, A. A. Tselikov, J. U. de Arruda, and J. N. Blake, "Imperfect quarter-waveplate compensation in Sagnac interferometer-type current sensors," J. Lightwave Technol., vol. 16, pp. 1212-1219, July 1998.

A. H. Rose, Z. B. Ren, and G. W. Day, "Twisting and annealing optical fiber for current sensors," J. Lightwave Technol., vol. 14, pp. 2492-2498, Nov. 1996.

D. Tang, A. H. Rose, G. W. Day, and S. M. Etzel, "Annealing of linear birefringence in single mode fiber coils: Application to optical fiber current sensors," J. Lightwave Technol., vol. 9, pp. 1031-1037, Aug. 1991.

P. Menke and T. Bosselmann, "Temperature compensation in magnetoopic AC current sensors using an intelligent AC-DC signal evaluation," J. Lightwave Technol., vol. 13, pp. 1362-1370, July 1995.

A. H. Rose, S. M. Etzel, and C. M. Wang, "Verdet constant dispersion in annealed optical fiber current sensors," J. Lightwave Technol., vol. 15, pp. 803-807, May 1997.

Opt. Lett. (1)

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