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. 2015 Sep 1;5:13649. doi: 10.1038/srep13649

Figure 14. The OSNR penalty at BER of 1 × 10−3 as a function of pulse power difference.

Figure 14

(a) 125-GBaud PDM-QPSK and (b) 125-Gbaud PDM-16QAM signals are tested under the three different power difference cases in Fig. 11.