In this paper, we investigate the effects of ISRS on signal quality of UWB transmission systems with experiments on S- (35 channel) and L- (40 channel) band WDM transmission using DP-16QAM signals. The results show that ISRS causes only signal power transfer, whereas the nonlinear cross-talk generated by ISRS has only minimal effect on signal quality. We prove the concept of UWB transmission by a DP-128QAM 150.3-Tb/s transmission experiment over a 40- km single-mode fiber in S, C, and L bands with WDM bandwidth of 13.6 THz; success is due to our proposed signal power optimization scheme which considers ISRS-induced power transfer between S and L bands.
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