We experimentally demonstrate, for the first time to our best knowledge, an ultra-low-noise second-order few-mode Raman amplified 8-λ WDM/MDM QPSK transmission over 100-km FMF with ~8-dB on-off gain and < 0.4 dB mode-dependent gain for LP01 and LP11 modes.
© 2017 Optical Society of America
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