Device for measuring current by optic fiber

Details Device for measuring current by optic fiber Device for measuring current by optic fiber

G - Physics

01

R

G01R 19/00 (2006.01) G01R 15/24 (2006.01) G01R 33/032 (2006.01)

Patent

CA 2068901

The device measures the current intensity (I) in a conductor (1) by FARADAY effect in a monomode optic fiber (2). It comprises a separator-polarizer (9) formed for example by two coplanar half-disks (10,11) of polarizing foil, whose favored polarization orientations form the required angle, 90° or 45°. Photodiodes (14,15) formed by a two-quadrant photodetector (16) in the shape of a disk of the same diameter as that (9) formed by the separator-polarizer, are located downline from the separator-polarizer. The photodiodes are connected to an electronic unit (5).

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