Research on Measurement Techniques for Integrated Optical Waveguide-Based Electric Field Sensors

The growing demand for high-precision sensing technologies in power systems has po-sitioned the development of novel electric field measurement tools as a critical metro-logical challenge. This study presents a broadband photoelectric electric field sensor based on the Mach-Zehnder interference phenomenon in asymmetric straight wave-guides. Furthermore, a three-dimensional electric field measurement system was de-veloped through systematic investigation of multidimensional field measurement methodologies. Experimental results demonstrate that the proposed device achieves broadband electric field measurement with linearity up to 0.9996 and pow-er-frequency measurement accuracy exceeding 97%. The system demonstrates con-current measurement capability for both lightning impulse waveforms and operation-al power frequency electric fields. The synthesized three-dimensional measurement error remains below 4%, enabling precise omnidirectional electric field detection.