A new record for data transfer rates - 43 terabits per second by one laser over a single fiber

Scientists from the Danish Technical University установили new record speed fiber optic data transmission. They managed to transfer 43 terabits per second over a single fiber using a single laser. Although still in 2011 was overcome threshold of 100 terabit / s, it was done with the help of several hundred lasers that maloprimenimo in real conditions .

The only "trick" resorted to by Danish scientists - using a recently developed in Japan with several fiber core. Externally, it is virtually no different from the usual, and is a monolithic fiber, not the package of individual fibers, but inside has 7 channels through which light passes. Thus, a new record for the Danes is much closer to practical applications than previously in the laboratory to demonstrate the speed of 100 and even 1,000 terabit / s.

Unfortunately, the press release of the Danish University stingy on the technical details, but we can assume that the technique was used OFDM with one laser, running short pulses. With it, three years ago, German scientists from the University of Karlsruhe handed over a single fiber 26 terabits / second.

The speed of 43 terabits / s hard to fit into the imagination. It's almost five and a half terabyte - several modern HDD, which fly in the second on a thin optical fiber. Passing on such a two-hour movie channel in high definition will only take a few milliseconds.

For the Danish Technical University is not the first speed record - in 2009, the Danes first broke the barrier of 1 terabit / s and up to the end of the year to improve the results of 5, 1 terabit, and in 2011 the rate was adjusted to 9, 5 terabit / s. German competitors of Karlsruhe in the same 2011, intercepted palm with 26 terabits, and now again record belongs to the Danes.



Source: habrahabr.ru/post/231803/