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

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This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(a) The back-to-back BER versus the OSNR for different signals comparing with theoretical curves. Inset (i) shows the spectrum of 37.5 and 62.5 GBaud PDM-16QAM (0.02-nm resolution). (b) BER performance versus transmission distance for the PDM all-optical Nyquist signals.