Optical Wireless Power Transfer Network System for Multiple AE Sensors

We present our recent research on an OWPT network system for multiple acoustic emission (AE) sensors using 808 nm laser diodes (LDs) and silicon-based photovoltaic (PV) cells. A Bluetooth network was used for data and control communication between the sensors and control PC, and a galvanometer was used to control the direction of the laser beam and supply power to each AE sensor module. Based on the results of this study, a GaAs-based PV cell was introduced as the optimal PV cell for the OWPT network system for multiple AE sensors, and the design of the PV cell epi-structure and top electrode pattern was carried out.