As of September 17, 2025, NTT and Mitsubishi Heavy Industries conducted an optical wireless power transmission experiment using laser beam to wirelessly transmit energy 1 kilometer away. [1] This marks the world’s highest achieved efficiency in an optical wireless power transmission using a silicon photoelectric conversion element, in an environment with strong atmospheric turbulence. This demonstrates the feasibility of delivering power to long distances, a development with many potential applications to on-demand power transmission to remote islands and disaster-stricken areas. The experiment combined NTT’s beam shaping technology with MHI’s light receiving technology to improve efficiency. In this experiment, the average electrical power extracted from the receiving panel was 152 W, corresponding to a wireless power transmission efficiency of 15%.
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