"The content of the present dissertation is a contribution to these multiple applications that has the fiber optics in the land of the science. In particular, the study concentrates on the use of the optic fiber as a guide of luminous wave besides an electro-optic crystal, both in an arrangement for the voltage measurement. Voltage sensors based on optical fiber have been study object in the recent years and along which the authors have used diverse technical and elements in order to achieving a high sensitivity in the measurement and a high stability again the variations of temperature mainly. This dissertation introduces the basic concepts of the fundamental configuration proposed for the used voltage sensor. Shows the theory that sustains each one of the carried out experiments. Also, provides and discusses the experimental results obtained, all this with the purpose and the effort of throwing a new light in the applicable measurement techniques to the industry where the environmental conditions are usually a hard test for the devices and where the security for people should be primordial."