| 摘要 |
<p>PURPOSE:To decrease the number of components by using three optical voltage sensors, splitting light from one light source into two by a polarization beam splitter and supplying them to sensors, and multiplexing modulated light signals optically by beam splitters of adjacent sensors and obtaining a differential light signal. CONSTITUTION:The light from the light source 6 is made incident on an optical voltage sensor S1 through an optical fiber 1 and split into P and S polarized light beams by the polarization beam splitter 10, and one light beam is made into a light signal modulated according to a voltage by a Pockels effect element 4 and a polarization beam splitter 11. This light signal is sent to the polarization beam splitter 11 and a 2nd adjacent sensor S2 and Pockels effect element by an optical fiber 1' and multiplexed, and the other polarized light beam is incident on a 3rd sensor S3 without being modulated and multiplexed by the polarization beam splitter 11; and voltages Eu, Ev, and Ew generated at the respective sensors S1-S3 are processed to obtain phase voltages.</p> |
