University of Vienna scientists successfully encrypted curved laser beam, and let the curved laser beam travel mileage reached 143 km.
This track record has created a new world record, almost 50 times more than the previous record. This new breakthrough can revolutionize satellite communications.
Light is an electromagnetic wave that has peaks and troughs. All light waves that make up an ordinary laser beam have the same phase and thus reach the crest or trough simultaneously. The different bending beams, which have different light waves with different phases, making it appear in the spiral shape of the road, the helical bending laser beam encryption and transmission of information with almost no capacity constraints, as communications, especially satellite communications ideal .
However, the ever-changing atmosphere will cause interference to information transmission, resulting in the transmission distance can not meet the practical application requirements. In 2014, Anton Zelinger of the University of Vienna conducted a bending light transmission experiment over Vienna, successfully encrypting and transmitting photos of Mozart and Boltzmann for 3 km. However, in order to be practical, curved lights must transmit information in undisturbed free space for at least tens of kilometers.
This time, Zelinger led his team to the Canary Islands and chose two observatories 143 km apart for experiments. They also pass more information by encrypting light waves of varying curvatures. As a result, this bending laser successfully encrypts the "HELLO WORLD!" Message and carries it across the two observatories. Upon reaching the end of the decipherement, it is found that the letter "P ", Other information is intact.
The new study has created the most distant record of bending laser transmission of information, except that the information currently encoded and decrypted is not as fast as the morse code used to send the telegram. Zelinger team will then use the existing adaptive optics and other technologies to improve the bending light system information transmission and compilation speed. Alain Werner, a scientist at the University of Southern California, who has long been engaged in bending optical communications, said: "The distance it takes to bend light to transmit information is a real challenge, but the latest research shows we can do it in the future. More surprises. "
Related papers published in the United States "National Academy of Sciences" on.