A change in voltage can be sensitively detected at a local part of a measured object. A set of laser medium and E-O probe are disposed between a pair of mirrors, a first one and a second one, forming a laser resonator. A linearly polarized light is emitted from the laser medium. The polarized light enters...http://www.google.de/patents/US5444365?utm_source=gb-gplus-sharePatent US5444365 - Voltage measuring apparatus having an electro-optic member
