1. ECOC 2015 P. Poggiolini, A. Carena, Y. Jiang, G. Bosco Politecnico di Torino, Italy F. Forghieri Cisco Photonics Italy, (MB) Italy

2. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 2

3. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 3

4. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 4 single-carrier 16-subcarriers 8-subcarriers

5. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 5 single-carrier 16-subcarriers 8-subcarriers

6. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 6 PSCF, span length 108 km, all EDFA

7. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 7 12620 km PSCF, span length 108 km, all EDFA

8. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 8 14180 km 12620 km 12.4 % reach increase PSCF, span length 108 km, all EDFA single-carrier and 8 subcarrier had same btb sensitivity prediction: 24 subcarriers 15%-16% gain PSCF fiber kindly provided by

9. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 9

10. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 10

11. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 11

12. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 12

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14. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 14 average PSD of NLI over the center channel PSD of the transmitted signal a constant value across different symbol rates means same maximum reach

15. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 15 124816326496 14 15 16 17 18 19 per-channel symbol rate, GBaud  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans average NLI power spectral density simulations

16. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 16 P. Poggiolini, Y. Jiang, A. Carena, G. Bosco, F. Forghieri, “Analytical results on system maximum reach increase through symbol rate optimization,” Proc. OFC 2015, paper Th3D.6, Los Angeles, Mar. 2015

17. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 17 124816326496 14 15 16 17 18 19 per-channel symbol rate, GBaud  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans average NLI power spectral density simulations 1.35 dB

18. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 18

19. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 19 124816326496 14 15 16 17 18 19 B WDM 5 THz per-channel symbol rate, GBaud average NLI power spectral density B WDM = 500 GHz simulations 2.5 THz1.5 THz  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans

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21. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 21

22. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 22 124816326496 14 15 16 17 18 19 1.5 THz2.5 THz B WDM 5 THz per-channel symbol rate, GBaud average NLI power spectral density B WDM = 500 GHz simulations  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans

23. ECOC 2015  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans www.optcom.polito.it - www.ismb.it - www.cisco.com 23 124816326496 14 15 16 17 18 19 B WDM 5 THz per-channel symbol rate, GBaud average NLI power spectral density B WDM = 500 GHz simulations 1.8 dB 2.45 dB 20% reach 1.35 dB

24. ECOC 2015 24 total system bandwidth, THz NLI mitigation [dB]  All curves drawn using the FULL EGN model  SRO: between 32 GBaud and the optimum rate 2.4 GBaud  BP: ideal backward propagation over the 32 GBaud center channel  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans 0.511.52345 0.5 1 1.5 2 BP SRO 1.35 1.8 2.45 1.25 actual BP

25. ECOC 2015 25 total system bandwidth, THz NLI mitigation [dB]  PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans 0.51235 0 1 1.5 2 2.5 3 BP SRO SRO + BP  All curves drawn using the FULL EGN model  SRO: between 32 GBaud and the optimum rate 2.4 GBaud  BP: ideal backward propagation over the bandwidth of the center channel (33.6 GHz) 2.7 1.8 1.25

26. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 26 124816326496 15 16 17 18 19 20 1.5 THz B WDM 5 THz 2.5 THz 500 GHz average NLI power spectral density simulations per-channel symbol rate, GBaud 1.1 dB 9% reach  PM-16QAM, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans 0.9 dB

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28. ECOC 2015 28 total system bandwidth, THz NLI mitigation [dB] 0.51235 0 1 1.5 2  PM-16QAM, roll-off 0.05, spacing 1.05 x (symb rate), SMF, 100 km spans, 50 spans  SRO: between 32 GBaud and the optimum rate 2.4 GBaud  BP: ideal backward propagation over the 32 GBaud center channel BP SRO

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30. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 30 http://thespinnakergroupinc.com/greenbuild-san-francisco-a-game-changer/ ? downloadable at www.optcom.polito.it

31. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 31

32. ECOC 2015 www.optcom.polito.it - www.ismb.it - www.cisco.com 32 1101001000 0 5 10 15 20 XPM EGN single channel FWM SMF 50 spans 2.4 GBaud 32 GBaud 96 GBaud  B WDM = 504 GHz  B WDM = 504 GHz, 1.92 Tb/s total, PM-QPSK, roll-off 0.05, spacing 1.05 x (symb rate), 100 km spans