Temperature-independent high-speed distributed voltage measurement using intensiometric FBG interrogation

In this paper, we demonstrate through simulation a low-cost, high-speed optical voltage sensing system with a multiplexing capability. The scheme utilizes transducers based on a hybrid piezoelectric/optical construction, whereby the optical power reflected from dual-peak fiber Bragg gratings is modulated in response to an excitation voltage and monitored by photodetection while remaining robust to fluctuations in optical power and temperature. A dedicated solid-state interrogation system incorporating passive wavelength division multiplexing allows for high-speed measurement over the ac/dc voltage sensor array without the use of expensive components, such as tunable filters or lasers.