Still connecting to the Internet via a fiber optic cable or Wi-Fi connection? That is so 2015. The Internet of the future will use airborne lasers to connect more people, more easily and more affordably, if a team of Facebook scientists and engineers has anything to say about it.
The team published a paper in the scientific journal Optica demonstrating the feasibility of using commercially available fluorescent materials to transmit data via laser beams through open space at speeds up to 2.1 Gbps. That’s more than double the speed of the fastest download speeds possible over a 4G wireless connection.
It is no secret Facebook has been working on new ways to deliver Internet service to people living in areas too remote to be easily reached with more common telecommunications infrastructures. The company launched its Project Aquila program through its Connectivity Lab last year to develop high-altitude, long-endurance unmanned drones capable of staying airborne for months at a time.
The biggest obstacle to an airborne network of Internet connections is the limitations inherent in current wireless technologies, which rely on radio broadcast transmissions to send information through the air. Radio transmission offers only a limited spectrum of frequencies that can be used, limiting data rates. Companies also have to get permission from national governments to use those frequencies for commercial purposes.
?EU?The use of optical carrier frequencies allows for many orders of magnitude more available spectrum, a high degree of spatial multiplexing, and the possibility to communicate at a high data rate in the absence of fiber network infrastructures, e.g., to space or high-altitude unmanned aerial vehicles,?EU? the researchers wrote in Optica.
But while laser communication offers significant opportunities, there were several engineering obstacles the researchers had to overcome first. A signal from a light…