can you imagine that An infrared laser light can charge your smartphone or tablet battery even from a distance of 30 meters, Although at the moment it only serves to power small sensors, this pioneering technology already exists. of this type wireless charging over the air It has been developed by researchers from Sejong University, South Korea.
they tell it from science alert And the results are reflected in a study published in Optics Express. It is a revolutionary, effective and completely safe technology. How does this work? An infrared laser light is used to transmit 400 mW of light power over a distance of up to 30 m.
Safety is guaranteed as the laser switches back to low frequency mode when not in use. The technology refines earlier experiments to transmit electricity wirelessly. The technical term for this type of load is Distributed laser charge.
The novelty has a huge differentiating feature with respect to other approaches, which require the receiving device to be on a special charging base or stationary. This technique is different: All it requires is that the transmitter and receiver are within sight of each other, As explained by Sejong University electrical engineer Jinyong Ha.
Normally, the light buoyant components that make up the laser cavity would be together in a single device. Here they are separated into a transmitter and a receiver, meaning that as long as the transmitter and receiver are in sight, a laser cavity is formed in the space between.
In the experimental setup, the researchers installed an amplifying transmitter specially treated with a silvery-white metal called erbium at a distance of 30 meters from the receiver, which contained a photovoltaic cell to convert the light signal into electrical energy.
The receiver is small enough to fit into a compact device such as a sensor. could help Charge smart home devices such as temperature or motion sensors. It measures only 10 millimeters by 10 millimeters.
As the level of energy that the system can transmit is increased, technology of Distributed laser charging can be used to power phone and tablet batteries. For example, it can be installed in public places such as airports or stations, eliminating the need for plugs or cables.
Although the system is designed to transfer as much energy as possible, there are several potential improvements that can be made: upgrading the photovoltaic cells in the receiver to convert more light into electricity, or with multiple receivers at the same time. Getting the setup to work are a few of them.
For potential concerns about whether lasers may affect health, it is Being in the safest part of the infrared spectrum, its central wavelength is 1550 nanometers., It can’t harm human skin and eyes,
In addition to being beneficially applied to personal electronics, innovative developments It can be applied in industrial environments where wiring is difficult to install, in factories to reduce costs, or in harsh environments. Where electrical connections may cause interference or present a fire hazard.
There are other exciting developments in this area: Last year, a group of researchers from the University of Michigan and the University of Tokyo invented a room where electronic devices receive batteries through the air, for example turning entire buildings into wireless charging stations. let’s install. sent by an electromagnetic field.
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