Fibre-optic transmission of 4000 km made possible by ultra-low-noise optical amplifiers
Researchers from Chalmers University of Technology, Sweden, and Tallinn University of Technology, Estonia, have demonstrated a 4000 kilometre fibre-optical transmission link using ultra low-noise, phase-sensitive optical amplifiers. This is a reach improvement of almost six times what is possible when using conventional optical amplifiers. The results are published in Nature Communications. Video streaming, cloud storage and other online services have created an insatiable demand for higher transmission capacity. To meet this demand,