A report on carrying more information and communication technologies by twisting optical angular momentum was published in the journal "Science Advances" on Japan.
It is understood that this is a scientific research team composed of physicists from the United Kingdom, Germany, New Zealand and Canada. They use letters other than 0 and 1 to transmit information and apply "optical angular momentum" to twist and solve the problem. Optical communication spreads in open space.
In the communication process, traditional digital communication uses 0 and 1 to transmit information, and this time Experiments encoding twisting photons allow them to convey additional information - similar to adding some alphabetical information to the 0s and 1s.
Scientists can "twist" photons (individual light particles) in a special way similar to the holograms used in credit cards so that the photons have angular momentum and can carry this information through free space. .
According to Researchers have evaluated the feasibility of these modes of quantum information transmission by testing the effects of the phase and intensity of optical angular momentum on the optical information carried over real links in urban environments. The 1,600-meter-long link was tested in Erlangen, Germany, through fields, streets and close to high-rise buildings to simulate as accurately as possible the urban environment and atmospheric disturbances that can affect the transfer of information in space
This research on optical systems in free space is a promising method that can provide us with the bandwidth of optical fibers without requiring physical connections. This method is a crucial step towards a cheaper and more convenient alternative to buried optical fiber connections in high-dimensional free-space optics. However, the atmospheric disturbances in the experiment highlighted the importance of waves in the process of broadband data transmission. The fragility of the front phase shape also indicates that there are still challenges that need to be faced in future adaptive optics.
