G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 29/08 (2006.01) G01R 29/12 (2006.01)
Patent
CA 2655447
The invention relates to a device for measuring an electromagnetic field and the temperature in an analysis zone, said device comprising: a light source (7) sending a light beam into a polarization-maintaining optical fibre (5), said beam being directed along one axis of the fibre; an anisotropic electrooptic material (1), placed in said zone, receiving the beam from the optical fibre and sending a beam into this fibre; means (13-14) for phase-shifting the beam sent back into the fibre converting the incident elliptical wave into a linear wave; means (19) for analyzing the intensity of said linear wave; a l/4 plate inserted between the optical fibre and the crystal, having its axes oriented at 45 degrees to the axes of the optical fibre; and means (15, 25) for determining the variations in the orientation of said linear wave output by the phase-shifting means.
L'invention concerne un dispositif de mesure d'un champ électromagnétique et de la température dans une zone d'analyse, comprenant une source lumineuse (7) envoyant dans une fibre optique à maintien de polarisation (5) un faisceau lumineux polarisé selon un axe de la fibre; un matériau électro-optique anisotrope (1) disposé dans ladite zone, recevant le faisceau de la fibre optique et renvoyant un faisceau dans cette fibre; des moyens (13-14) de déphasage du faisceau renvoyé dans la fibre transformant l'onde elliptique incidente en onde rectiligne; des moyens (19) d'analyse de l'intensité de ladite onde rectiligne; une lame .lambda./4 insérée entre la fibre optique et le cristal, ayant ses axes orientés à 45 degrés des axes de la fibre optique; et des moyens (15, 25) de détermination des variations de l'orientation de ladite onde rectiligne en sortie des moyens de déphasage.
Duvillaret Lionel
Gaborit Gwenael
Institut National Polytechnique de Grenoble
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Universite de Savoie
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