| Abstract: | Reflection type transverse modulation optical voltage sensors, which employ reflection retarders to replace quarter wave plates, are convenient for practical use. In previous literatures, the measured voltage was all applied to Bi 4Ge 3O 12 crystal along the (110) direction for transverse modulation optical voltage sensor, and crystals are used as sensing materials. In this paper, reflection type transverse modulation optical voltage sensor has been analyzed theoretically and a novel configuration in which the measured voltage is applied to a Bi 4Ge 3O 12 crystal along the (001) direction with light wave passing through the crystal in the (110) direction has been proposed. According to this theoretical analysis, a novel optical voltage sensor, which can be used in a 220 kV optical fiber voltage transformer, has been designed and assembled. Experimental results showed that the linearity and the stability of the sensor during 24 hours can reach 0.3%. |
