Movable probe carrying optical waveguides with electro-optic or magneto- optic material for measuring electric or magnetic fields

摘要

A probe for the non-contact measurement of electric or magnetic field strengths has two wave guides provided on a substrate. One of the wave guides has a measurement portion consisting of an electro- optical material or a magneto-optical material in a region of a measurement zone. A magnetic or electric field changes the index of refraction of the measuring portion and the intensity of a light wave traveling through this portion of the wave guide is reduced. Comparison is then made between a standard intensity in the other wave guide and a reduced intensity in the light traveling through the wave guide measuring portion.