| 摘要 |
A voltage sensor is composed by arranging along the optic axis, successively from the side of incident light, a first polarizer, a Pockels cell for detection, a Pockels cell for modulation, and a second polarizer wherein an electric field proportional to a voltage to be measured is applied to the Pockels cell for detection, and a periodic electric field for modulation that varies the phase difference by 2n pi radians, where n is a positive integer, during each period and that has a frequency higher than the electric field applied to the Pockels cell for detection is applied to the Pockels cell for modulation, and the voltage to be measured is determined based on a phase change in the intensity of the light output from the second polarizer. <IMAGE> |
