US sets record for wireless power transmission using lasers

Wireless power transmission technology using laser beams will open up a new future, solving the difficulties of power transmission, especially in military and humanitarian relief in difficult terrain.

PRAD laser receiver - Photo: DARPA

According to the New Atlas website, the US Defense Advanced Research Projects Agency (DARPA) has just set a new record in wireless power transmission technology when it successfully transmitted 800W of power via laser beam over a distance of 8.6km in 30 seconds in New Mexico. Previously, this system only transmitted 230W over 1.7km in 25 seconds.

This is a major step forward for the POWER (Continuous Optical Wireless Power Transmission) program, which aims for a future without wires, instead using laser beams to transmit energy through the air.

The system uses a receiver device called PRAD (Power Receiver Array Demo) - a spherical structure that receives incoming laser beams, reflects them through a parabolic mirror, and then shines them onto dozens of photoelectric cells to convert the laser beams into electricity.

While the current efficiency is only 20%, DARPA says this is acceptable for the power and range development phase, and will improve as the project scales. The project is currently in Phase 1 of a three-phase plan. The ultimate goal is to transmit 10kW of power over 200km using equipment mounted on an aircraft or drone.

This laser wireless transmission technology is expected to open up a new future, solving the difficulties of power transmission, especially in military and humanitarian relief - where it is impossible to pull power lines due to difficult terrain.

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Source: https://tuoitre.vn/my-lap-ky-luc-truyen-dien-khong-day-bang-tia-laser-20250619103058528.htm