Fibre optical arrangement for measuring the intensity of an elec

Details Fibre optical arrangement for measuring the intensity of an elec Fibre optical arrangement for measuring the intensity of an elec

1979-08-13

1981-03-10

Rosenberger, Richard A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 96, 350 9629, G01R 1507

Patent

active

042550181

ABSTRACT:
A fibre optical arrangement for measuring the intensity of an electric current using the Faraday effect, in which the path of light whose state of polarization is influenced by the magnetic field surrounding the conductor through which current flows is marked by the core of an optical fibre which is coiled round the conductor in a number of turns, the optical fibre used in the arrangement being one which has a circular double refraction .alpha. at least of the order of magnitude of a linear double refraction .beta. determined by the structure of the fibre and its coiled arrangement. The fibre is preferably twisted about its longitudinal axis so that the twist is substantially evenly distributed over the length of the optical fibre.

REFERENCES:
patent: 3605013 (1971-09-01), Yoshikawa et al.
patent: 4070620 (1978-01-01), Feldtkeller et al.
Papp et al., "Polarization Optics of Index-Gradient Optical Waveguide Fib," Applied Optics, vol. 14, No. 10 (Oct. 1975), pp. 2406-2411.
Papp et al., "Polarization Optics of Liquid-Core Optical Fibers," Applied Optics, vol. 16, No. 5 (May 1977), pp. 1315-1319.

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