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We demonstrate 120.7-Tb/s SDM/WDM unrepeatered transmission over a 204-km 7-core fiber with aggregate spectral efficiency of 53.6 b/s/Hz using a remotely pumped 7-core EDFA and Raman amplification. 17.2-Tb/s (180 × 95.8 Gb/s) PDM-32QAM signals have been transmitted at each core.
We evaluate fiber fuse characteristics of bend-insensitive optical fibers and show that hole-assisted fiber (HAF) is applicable as fiber fuse stopper in high-power optical transmission systems. We also clarify fiber fuse stopping mechanism of HAF.
A novel low-noise extended L-band silicate erbium-doped fibre amplifier (EDFA) is proposed, consisting of two novel gain-flattened gain blocks for wavelength-division multiplexing (WDM) signals from 1562.2 to 1619.6 nm. Each gain block consists of three isolated phosphorus/alumina co-doped silicate EDFs, an intermediate embedded gain flattening filter (GFF), a short wavelength pump laser diode, and...
Online OTDR monitoring in a novel online remotely-pumped EDF/distributed Raman hybrid inline amplifier scheme is demonstrated. Using the proposed directional bypass configuration in this scheme realizes online monitoring without transmission impairment.
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