Faraday-effect sensing coil with stable birefringence

Details Faraday-effect sensing coil with stable birefringence Faraday-effect sensing coil with stable birefringence

G - Physics

01

R

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

Patent

CA 2183243

A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.

Une bobine de détection à effet Faraday, en fibre optique, a une biréfringence linéaire et circulaire très faible qui reste stable sur une large plage de températures. La bobine est fabriquée à partir d'une fibre filée présentant une longueur de battement linéaire, efficace, de 100 mètres ou plus et est recuite après avoir été formée dans la bobine. La bobine présente une meilleure discrimination des champs magnétiques associés aux câbles acheminant le courant électrique, et peut être incorporée dans un transducteur de courant optique (TCO) soit interférométrique, soit polarimétrique.

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