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.
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Rahn et al. (2012) studied this question.
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