Submitted by Michael Frankfort @mfrank_76
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Researchers have developed a new wireless laser charging system that uses infrared light to transfer power over distances of up to 30 meters. This system could potentially charge mobile devices and sensors without the need for power cables. The technology, described in the journal Optics Express, uses a method called distributed laser charging, which allows for safe high-power illumination with minimal light loss.
The system consists of a transmitter and receiver that form a laser cavity when in line of sight, enabling light-based power transfer. It automatically switches to a safe low-power mode if the line of sight is blocked. Laboratory tests showed the system could transfer 400 mW of light power, converting it to 85 mW of electrical power. Researchers are now working to improve the system’s efficiency and develop ways to charge multiple receivers simultaneously. This innovation could be particularly useful in environments where electrical connections pose risks or interference.