Device for measuring current by optic fiber and dual polarizatio

Details Device for measuring current by optic fiber and dual polarizatio Device for measuring current by optic fiber and dual polarizatio

1992-05-14

1993-10-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324 96, H01J 516

Patent

active

052568725

ABSTRACT:
The device measures the current intensity in a conductor by FARADAY effect in a monomode optic fiber. It comprises a separator-polarizer formed for example by two coplanar half-disks of polarizing foil, whose polarization directions form a required angle, 90.degree. or 45.degree.. Photodiodes formed by a two-quadrant photodetector in the shape of a disk of the same diameter as that formed by the separator-polarizer, are located behind from the separator-polarizer. The photodiodes are connected to an electronic unit.

REFERENCES:
patent: 4255018 (1981-03-01), Ulrich et al.
patent: 4740078 (1988-04-01), Daendliker et al.
patent: 5136235 (1992-08-01), Brandle et al.
8132 RGE Revue Generale de l'Electricite, (1990) Apr., No. 4, Paris France, pp. 62-67.
8030 Electronics Letters, vol. 19 (1983) Jul., No. 15, London, Great Britain, pp. 578-579.

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