The electra-optical voltage sensor has an electra-optically active medium and
a distance medium between two electrodes, between which the voltage V to be measured
is present. The media and the thicknesses d1, d2 of the media
are chosen in such a way that the measured voltage signal has no temperature dependence.
By way of example, the thicknesses d1, d2 are chosen in such
a way that the influence of the temperature dependences of critical electra-optical
coefficients and dielectric constants of the media on the voltage signal cancel
one another out. The two media are advantageously arranged in the form of a rod,
comprising an alternating arrangement of cylindrical elements of the two media,
between the electrodes. BGO and fused silica may advantageously be used as media.
The sensor is preferably cast in silicone. It is possible to realize a mechanically
stable, temperature-stabilized voltage sensor with low reflection losses, a large
half wave voltage and a small sensitivity toward disturbances of the electric field.
