Optical wireless energy transmission using lasers is a method that can supply energy to distant locations with high directionality. However, the closer the laser beams are to the ground surface, the more they fluctuate and are more-strongly affected by atmospheric turbulence, leading to a decrease in transmission efficiency, particularly in locations with strong atmospheric turbulence during the day. To address these issues, irradiance at the receiver side was homogenized using a homogenizer with diffuser glass, light was confined using reflectors, and a leveling circuit was applied. As a result, impact from atmospheric turbulence could be reduced, and transmission of 150 W to a location 1 km away outdoors using a 1 kW near-infrared laser was demonstrated.
