Abstract
In the global telecommunications scenario, a great deal of interest has recently been devoted to taking the internet to country remote communities that are densely populated but in which the challenges imposed by climatic and environmental limitations are not straightforward to overcome. This chapter focuses on high-capacity unrepeatered optical transmission systems to enable high-speed connectivity in hard-to-reach areas. An optimization method for the unrepeatered optical system design is provided and detailed, followed by laboratory demonstrations showing the potential of repeaterless transmission in WDM systems with 400 Gb/s per carrier over distances greater than 400 km.
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