Zhu, B 800Gb/s (8x128Gb/s) unrepeatered transmission over 515-km large-area ultra-low-loss fiber using 2nd-order Raman pumping. [electronic resource] - Optics express Oct 2016 - 25291-25297 p. digital Publication Type: Journal Article ISSN: 1094-4087 Standard No.: 10.1364/OE.24.025291 doi