A Multiplexing Optical Partial Discharge Sensing System for Power Transformer using a Single Photodetector

Optical ultrasonic sensor multiplexing for partial discharge (PD) detection based on a single photodetector is a challenging task. In this paper, we propose a novel multiplexed optical ultrasonic sensing system based on swept frequency interferometry. Optical ultrasonic sensor multiplexing is achieved using different carrier frequencies that depend on the length differences between the sensing fib...