G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 29/08 (2006.01) G01R 15/24 (2006.01)
Patent
CA 2144076
An electric field sensor comprises a substrate, an incident optical waveguide formed on the substrate, two branched optical waveguides formed on the substrate to be branched from the incident optical waveguide and having refractive indexes variable in response to an electric field intensity applied thereto, an outgoing optical waveguide formed on the substrate to join the branched optical waveguides, and an electric field shielding member formed in the vicinity of a part of the branched optical waveguides for shielding an electric field. The substrate may be provided with a reflection mirror for reflecting light beams from the branched optical waveguides. The substrate is made of a ferroelectric material and has polarization directions reverse to each other at portions where the two branched optical waveguides are formed.
Capteur de champs électriques comprenant une entrée optique, un guide d'ondes d'entrée (5) formé sur un substrat (4), deux guides d'ondes (6) ramifiés dérivés du guide d'ondes (5) se trouvant sur le substrat et dont les indices de réfraction varient en fonction de l'intensité du champ électrique utilisé, un guide d'ondes de sortie (7) relié aux guides d'ondes (6) se trouvant sur le substrat (4) et un élément de protection (8) ménagé près des guides (6) pour protéger une partie du guide d'ondes (6) des champs électriques. Un miroir réfléchissant (16) peut être ménagé sur le substrat (4) de manière à réfléchir la lumière provenant des guides (6). Le substrat (4) peut être composé d'une substance ferroélectrique dans laquelle les zones respectives des deux guides d'ondes (6) sont polarisées dans des directions opposées.
Kondo Michikazu
Tokano Yuichi
Dennison Associates
Nec Tokin Corporation
Tokin Corporation
LandOfFree
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