Unrepeatered transmission of 3.2-Tb/s (32×120-Gb/s) over 445-km fiber link with Aeff managed span

We demonstrated 3.2-Tb/s (32×120-Gb/s) unrepeatered transmission over 445-km fiber with Aeff-managed-span. This was achieved by employing co-propagating second-order pumped Raman amplification and ROPA. This paper also discusses design trade-off for performance enhancement of unrepeatered transmission.

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