Key points are not available for this paper at this time.
A 250Gb/s super-channel using Photonic Integrated Circuits (PIC) was transmitted over 6000km along with a 500Gb/s super-channel and conventional 40Gb/s and 100Gb/s channels. The linear terrestrial line system uses FlexWSS multiplexing technologies and Hybrid RamanEDFA amplifiers.
Rahn et al. (Sun,) studied this question.