Figure 2 | Scientific Reports

Figure 2

From: Spectrally Shaped DP-16QAM Super-Channel Transmission with Multi-Channel Digital Back-Propagation

Figure 2

Back-to-back performance of the spectrally shaped DP-16QAM transmitter.

(a) BER as a function of received OSNR (0.1 nm resolution bandwidth) for a single channel with a roll-off factor of 0.1%. (b) Required OSNR to achieve a BER of 1.5·10−2 as a function of the RRC filter roll-off factor for a single channel system. (c) Required OSNR to achieve a BER of 1.5·10−2 as a function of both the RRC filter roll-off factor and the channel spacing, for the central channel, in the 7-channel WDM system.

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