Interferometric optical fiber electric current measuring device

Details Interferometric optical fiber electric current measuring device Interferometric optical fiber electric current measuring device

1980-07-23

1983-01-25

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324 96, G01R 1900

Patent

active

043706126

ABSTRACT:
The current-measuring device in accordance with the invention comprises an optical fiber wound around the conductor in which flows the current to be measured, a laser source, means for separating the radiation emitted by the source towards the two ends of the wound fiber, and for recombining the radiation emerging from these two ends, a conductor circuit through which flows an adjustable reference current, a detection device supplying a signal characteristic of the interferences between the two waves emerging from the fiber, the reference current being adjusted so that the phase shift between the two contra-rotating waves in the fiber is zero, this current being then proportional to the current to be measured flowing in the principal conductor.

REFERENCES:
patent: 4070622 (1978-01-01), Harms et al.
patent: 4299490 (1981-11-01), Cahill et al.

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