New system transmits high-speed unrepeated signal over 520 kilometers

EurekAlert  December 16, 2019
To make long-haul data transmission cheaper an international team of researchers (Russia, USA industry) developed transmission line with three sections, each consisting of fiber optic cables of two types connected in series. Remote optically pumped erbium amplifiers (ROPA) were installed at the points of junction between the sections. The systems amplify the signal along the link without the need for electrical power sources. They successfully transmitted a signal over 520 km (323 mi) at 200 Gbps. To avoid the attenuation of the signal, it was amplified initially upon transmission and then two more times remotely, along the way. They are working on a fiber optic system that would achieve higher transfer rates and speed…read more. TECHNICAL ARTICLE