The U.S. Naval Research Laboratory's SWELL experiment achieved continuous in-orbit laser power transmission for more than 100 days in 2023, delivering about 1.5 W over 1.45 meters with an end-to-end efficiency of approximately 11%.
Sources
- Review of the Development of Energy Technology Experiment for ... (spj.science.org)
- https://www.nrl.navy.mil/Media/News/Article/3457014/first-in-space-laser-power-beaming-experiment-surpasses-100-days-of-successful/ (nrl.navy.mil)
- https://militaryembedded.com/radar-ew/signal-processing/laser-power-beaming-experiment-passes-100-days-of-of-on-orbit-operation (militaryembedded.com)
- https://www.navy.mil/DesktopModules/ArticleCS/Print.aspx?PortalId=1&ModuleId=523&Article=3457305 (navy.mil)