Fibre optical arrangement for measuring the intensity of an electric current
First Claim
1. A fiber optical arrangement for measuring the intensity of an electric current using the Faraday effect, in which the path of light for the 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 fiber which is coiled round the conductor in a number of turns, the optical fiber used in the arrangement being one which has a circular double refraction α
- at least of the order of magnitude of a linear double refraction β
determined by the structure of the fiber and its coiled arrangement.
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Accused Products
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 α at least of the order of magnitude of a linear double refraction β 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.
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Citations
14 Claims
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1. A fiber optical arrangement for measuring the intensity of an electric current using the Faraday effect, in which the path of light for the 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 fiber which is coiled round the conductor in a number of turns, the optical fiber used in the arrangement being one which has a circular double refraction α
- at least of the order of magnitude of a linear double refraction β
determined by the structure of the fiber and its coiled arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- at least of the order of magnitude of a linear double refraction β
Specification