Growth and Characterization of Single Crystalline Bi₄Ge₃O₁₂ Fibers for Electrooptic High Voltage Sensors

Figure 2

Electrooptic BGO voltage sensor in 170 kV gas-insulated switchgear. The BGO crystal is inside the transparent insulator tube between the electrodes at high voltage (bottom) and ground potential (top). The crystal is operated in a reflective mode with optical fiber cables (red) guiding the light to and from the ground potential side.