NTT and Mitsubishi Heavy Industries Achieved World’s Highest Efficiency in Laser Wireless Power Transmission under Atmospheric Turbulence
TOKYO - September 17, 2025 - (JCN Newswire via SeaPRwire.com) - NTT, Inc. (Headquarters: Chiyoda, Tokyo; President and CEO: Akira Shimada; hereinafter "NTT") and Mitsubishi Heavy Industries, Ltd. (Headquarters: Chiyoda, Tokyo; President and CEO: Eisaku Ito; hereinafter "MHI") conducted an optical wireless power transmission experiment using laser beam to wirelessly transmit energy 1 kilometer away. By irradiating laser beam with an optical power of 1 kW, we succeeded in receiving 152 W of electric power 1 kilometer away. This marks the world's highest efficiency of an optical wireless power transmission using a silicon photoelectric conversion element(*2) in an environment with strong atmospheric turbulence.This result demonstrates the feasibility of delivering power to distant sites. In the future, it is expected to be applied to on-demand power transmission to remote islands and disaster-stricken areas where power cables cannot be installed.This achievement was published in the British magazine Electronics Letters on August 5, 2025.Figure 1 Schematic diagram of optical wireless power transmission system BackgroundIn recent years, wireless power transmission technologies for ...
