High-performance laser power converters with resistance to thermal annealing

High-performance laser power converters are crucial for laser wireless power transmission systems. Through the optimization of the resistive thermal annealing temperature applied to the laser power converter, the conversion efficiency reaches 55.0%. For 830 nm laser irradiation, the conversion efficiency further elevates to 59.3%. The potential for improvement remains substantial, with an anticipated increase to 63.8% achievable through the optimization of current matching at this specific wavelength. Moreover, the reliability of the laser power converter is demonstrated by its ability to 1,000 hours of operation at an elevated temperature of 180°C.