Patent ID: 8233754
Filing Date: 2012-07-31
Classification: G01R

Abstract:
1. A method for measuring a voltage in a high voltage range, between a first point and a second point, the method comprising the steps of: arranging at least one electro-optical light transmitting element between said first point and said second point; passing light through said electro-optical light transmitting element from said first point to said second point; and measuring a phase shift introduced in said light by an electric field of said electro-optical light transmitting element; using polarimetric detection in transmission of said light, in which one of two exit channels contains a quarter-wave plate and a polarizer, and the other one of the two exit channels contains only a polarizer; and measuring quadrature signals in the two channels, wherein said electro-optical light transmitting element forms a waveguiding fiber and said light is guided in said fiber between said first point and said second point, and wherein said fiber has a crystalline core surrounded by a cladding.