Abstract

We demonstrated the transmission of a Nyquist-WDM signal based on PM-64QAM modulation in an EDFA-only submarine configuration composed of 54.4 km-long fiber spans: 20 channels at 124.8-Gb/s were propagated over 1306 km of low-loss pure-silica-core fiber (PSCF). Thanks to an aggressive digital spectral shaping, we achieved a raw spectral efficiency (SE) of 10.4 b/s/Hz, corresponding to 8.67 b/s/Hz net SE when considering a 20% FEC overhead. Transmitter DACs are operated at a record-low 1.15 samples/symbol, enabled by the insertion of advanced anti-alias filters. The achieved SE-times-distance product was 11,327 (b∙km)/(s∙Hz), the highest reported so far for PM-64QAM. Combining the experimental results with the performance predictions obtained using an analytical model of nonlinear propagation in uncompensated coherent optical systems (the so-called “GN-model”), we show that PM-64QAM is a realistic option for ultra-high capacity systems in the 1,000 km range, carrying up 40 Tb/s in the C-band.

© 2014 Optical Society of America

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2013 (2)

2012 (5)

P. Poggiolini, “The GN model of non-linear propagation in uncompensated coherent optical systems,” J. Lightwave Technol. 30(24), 3857–3879 (2012).
[CrossRef]

A. Carena, V. Curri, G. Bosco, P. Poggiolini, F. Forghieri, “Modeling of the impact of nonlinear propagation effects in uncompensated optical coherent transmission links,” J. Lightwave Technol. 30(10), 1524–1539 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

2011 (2)

Borel, P. I.

Bosco, G.

A. Carena, V. Curri, G. Bosco, P. Poggiolini, F. Forghieri, “Modeling of the impact of nonlinear propagation effects in uncompensated optical coherent transmission links,” J. Lightwave Technol. 30(10), 1524–1539 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, “On the performance of nyquist-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM Subcarriers,” J. Lightwave Technol. 29(1), 53–61 (2011).
[CrossRef]

Caponio, N. P.

Carena, A.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

A. Carena, V. Curri, G. Bosco, P. Poggiolini, F. Forghieri, “Modeling of the impact of nonlinear propagation effects in uncompensated optical coherent transmission links,” J. Lightwave Technol. 30(10), 1524–1539 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, “On the performance of nyquist-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM Subcarriers,” J. Lightwave Technol. 29(1), 53–61 (2011).
[CrossRef]

Carlson, K.

Chi, N.

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

Chien, H.-C.

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

Cigliutti, R.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

Curri, V.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

A. Carena, V. Curri, G. Bosco, P. Poggiolini, F. Forghieri, “Modeling of the impact of nonlinear propagation effects in uncompensated optical coherent transmission links,” J. Lightwave Technol. 30(10), 1524–1539 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, “On the performance of nyquist-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM Subcarriers,” J. Lightwave Technol. 29(1), 53–61 (2011).
[CrossRef]

Detwiler, T. F.

Dong, Z.

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

Filer, M. M.

Forghieri, F.

A. Carena, V. Curri, G. Bosco, P. Poggiolini, F. Forghieri, “Modeling of the impact of nonlinear propagation effects in uncompensated optical coherent transmission links,” J. Lightwave Technol. 30(10), 1524–1539 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, “On the performance of nyquist-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM Subcarriers,” J. Lightwave Technol. 29(1), 53–61 (2011).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

Hsueh, Y.-T.

Isaac, R.

Magill, P.

Nelson, L. E.

Nespola, A.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

Peckham, D. W.

Poggiolini, P.

Ralph, S. E.

Sasaki, T.

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

Shao, Y.

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

Stark, A. J.

Tibuleac, S.

Torrengo, E.

Yamamoto, Y.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

R. Cigliutti, E. Torrengo, G. Bosco, N. P. Caponio, A. Carena, V. Curri, P. Poggiolini, Y. Yamamoto, T. Sasaki, F. Forghieri, “Transmission of 9x138 Gb/s Prefiltered PM-8QAM Signals Over 4000 km of Pure Silica-Core Fiber,” J. Lightwave Technol. 29(15), 2310–2318 (2011).
[CrossRef]

Yanchao, J.

G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
[CrossRef]

Yu, J.

J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
[CrossRef]

Zeolla, D.

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
[CrossRef]

Zhou, X.

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J. Yu, Z. Dong, H.-C. Chien, Y. Shao, N. Chi, “7-Tb/s (7×1.284 Tb/s/ch) signal transmission over 320 km using PDM-64QAM modulation,” IEEE Photon. Technol. Lett. 24(4), 264–266 (2012).
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R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, “16 × 125 Gb/s quasi-nyquist DAC-generated PM-16QAM transmission over 3590 km of PSCF,” IEEE Photon. Technol. Lett. 24(23), 2143–2146 (2012).
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G. Bosco, R. Cigliutti, A. Nespola, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, J. Yanchao, P. Poggiolini, “Experimental investigation of nonlinear interference accumulation in uncompensated links,” IEEE Photon. Technol. Lett. 24(14), 1230–1232 (2012).
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P. J. Winzer and A. H. Gnauck, “112-Gb/s polarization-multiplexed 16-QAM on a 25-GHz WDM grid,” in Proceedings of ECOC2008, paper Th.3.E.5.
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A. H. Gnauck, P. J. Winzer, C. R. Doerr, and L. L. Buhl, “10 × 112-Gb/s PDM 16-QAM transmission over 630 km of fiber with 6.2-b/s/Hz spectral efficiency,” in Proceedings of OFC2009, paper PDPB8.
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S. Yamanaka, T. Kobayashi, A. Sano, H. Masuda, E. Yoshida, Y. Miyamoto, T. Nakagawa, M. Nagatani, and H. Nosaka, “11 x 171 Gb/s PDM 16-QAM transmission over 1440 km with a spectral efficiency of 6.4 b/s/Hz using high-speed DAC,” in Proceedings of ECOC2010, paper We.8.C.1.

M.-F. Huang, Y.-K. Huang, E. Ip, Y. Shao, and T. Wang, “WDM transmission of 152-Gb/s polarization multiplexed RZ-16QAM signals with 25-GHz channel spacing over 15×80-km of SSMF,” in Proceedings of OFC2011, paper OThX2.

J.-X. Cai, H. G. Batshon, H. Zhang, C. R. Davidson, Y. Sun, M. Mazurczyk, D. G. Foursa, A. Pilipetskii, G. Mohs, and N. S. Bergano, “25 Tb/s Transmission over 5,530 km using 16QAM at 5.2 bits/s/Hz spectral efficiency,” in Proceedings of ECOC2012, paper Mo.1.C.1.
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A. Nespola, S. Straullu, A. Carena, G. Bosco, R. Cigliutti, V. Curri, P. Poggiolini, M. Hirano, Y. Yamamoto, T. Sasaki, J. Bauwelinck, K. Verheyen, and F. Forghieri, “Extensive fiber comparison and GN-model validation in uncompensated links using DAC-generated nyquist-WDM PM-16QAM channels,” in Proceedings of OFC2013, paper OTh3G.5.
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A. Sano, T. Kobayashi, A. Matsuura, S. Yamamoto, S. Yamanaka, E. Yoshida, Y. Miyamoto, M. Matsui, M. Mizoguchi, and T. Mizuno, “100 x 120-Gb/s PDM 64-QAM transmission over 160 km using linewidth-tolerant pilotless digital coherent detection,” in Proceedings of ECOC2010, paper PD2.2.

T. Kobayashi, A. Sano, A. Matsuura, M. Yoshida, T. Sakano, H. Kubota, Y. Miyamoto, K. Ishihara, M. Mizoguchi, and M. Nagatani, “45.2Tb/s C-band WDM transmission over 240km using 538Gb/s PDM-64QAM single carrier FDM signal with digital pilot tone,” in Proceedings of ECOC2011, paper Th.13.C.6.
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A. Sano, T. Kobayashi, S. Yamanaka, A. Matsuura, H. Kawakami, Y. Miyamoto, K. Ishihara, and H. Masuda, “102.3-Tb/s (224 x 548-Gb/s) C- and extended L-band All-Raman transmission over 240 km using PDM-64QAM single carrier FDM with digital pilot tone,” in Proceedings of OFC2012, paper PDP5C.3.
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O. Bertran-Pardo, J. Renaudier, H. Mardoyan, P. Tran, R. Rios-Muller, A. Konczykowska, J.-Y. Dupuy, F. Jorge, M. Riet, B. Duval, J. Godin, S. Randel, G. Charlet, and S. Bigo, “Transmission of 50-GHz-spaced single-carrier channels at 516Gb/s over 600km,” in Proceedings of OFC2013, paper OTh4E.2.
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A. Nespola, S. Straullu, G. Bosco, A. Carena, J. Yanchao, P. Poggiolini, F. Forghieri, Y. Yamamoto, M. Hirano, T. Sasaki, J. Bauwelinck, and K. Verheyen, “1306-km 20x124.8-Gb/s PM-64QAM transmission over PSCF with Net SEDP 11,300 (b∙km)/s/Hz using 1.15 samp/symb DAC,” in Proceedings of ECOC2013, paper Th.2.D.1.

J. Renaudier, G. Charlet, O. Bertran Pardo, H. Mardoyan, P. Tran, M. Salsi, and S. Bigo, “Experimental analysis of 100Gb/s coherent PDM-QPSK long-haul transmission under constraints of typical terrestrial networks,” in Proceedings of ECOC2008, paper Th.2.A.3.
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M. Salsi, H. Mardoyan, P. Tran, C. Koebele, G. Charlet, and S. Bigo, “155x100 Gbit/s coherent PDM-QPSK transmission over 7,200 km,” in Proceedings of ECOC2009, paper PD2.5.

J.-X. Cai, Y. Cai, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, and N. S. Bergano, “Transmission of 96x100G pre-filtered PDM-RZ-QPSK channels with 300% spectral efficiency over 10,608km and 400% spectral efficiency over 4,368km,” in Proceedings of OFC2010, paper PDPB10.
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E. Torrengo, R. Cigliutti, G. Bosco, G. Gavioli, A. Alaimo, A. Carena, V. Curri, F. Forghieri, S. Piciaccia, M. Belmonte, A. Brinciotti, A. La Porta, S. Abrate, and P. Poggiolini, “Transoceanic PM-QPSK terabit superchannel transmission experiments at Baud-Rate subcarrier spacing,” in Proceedings of ECOC2010, paper We.7.C.2.
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J.-X. Cai, Y. Cai, Y. Sun, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, and N. S. Bergano, “112x112 Gb/s transmission over 9,360 km with channel spacing set to the Baud rate (360% spectral efficiency),” in Proceedings of ECOC2010, paper PD2.1.

D. Foursa, Y. Cai, J.-X. Cai, C. Davidson, O. V. Sinkin, W. T. Anderson, A. Lucero, A. Pilipetskii, G. Mohs, and N. S. Bergano, “Coherent 40 Gb/s transmission with high spectral efficiency over transpacific distancE,” in Proceedings of OFC2011, paper OMI4.
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X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, P. Magill, M. Cvijetic, L. Nelson, M. Birk, G. Zhang, S. Ten, H. B. Matthew, and S. K. Mishra, “32Tb/s (320´114Gb/s) PDM-RZ-8QAM transmission over 580 km of SMF-28 ultra-low-loss fiber,” in Proceedings of OFC2009, paper PDPB4.

E. Torrengo, R. Cigliutti, G. Bosco, A. Carena, V. Curri, P. Poggiolini, A. Nespola, D. Zeolla, and F. Forghieri, “Experimental validation of an analytical model for nonlinear propagation in uncompensated optical links,” in Proceedings of ECOC2011, paper We.7.B.2.
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R. Schmogrow, M. Meyer, P. C. Schindler, A. Josten, S. Ben-Ezra, C. Koos, W. Freude, and J. Leuthold, “252 Gbit/s Real-Time Nyquist Pulse Generation by Reducing the Oversampling Factor to 1.33,” in Proceedings of OFC2013, paper OTu2I.1.
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A. Sano, T. Kobayashi, A. Matsuura, S. Yamamoto, S. Yamanaka, E. Yoshida, Y. Miyamoto, M. Matsui, M. Mizoguchi, and T. Mizuno, ”100 x 120-Gb/s PDM 64-QAM transmission over 160 km using linewidth-tolerant pilotless digital coherent detection,” in Proceedings of OFC2010, paper PD2.4.

Y. Gao, A. P. T. Lau, C. Lu, J. Wu, Y. Li, K. Xu, W. Li, and J. Lin, “Low-complexity two-stage carrier phase estimation for 16-QAM systems using QPSK partitioning and maximum likelihood detection,” in Proceedings of OFC2011, paper OMJ6.
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Figures (9)

Fig. 1
Fig. 1

Net spectral efficiency evolution of main record transmission experiments based on coherent detection published in the last five years.

Fig. 2
Fig. 2

System reach vs. throughput trade-off in main record transmission experiments based on coherent detection published in the last five years.

Fig. 3
Fig. 3

Transmitter set-up for 20 PM-64QAM Nyquist-WDM channels at 10.4 Gbaud spaced 12 GHz.

Fig. 4
Fig. 4

Spectrum of the modulator-driving signal (8-level NRZ PAM) with (a) and without (b) anti-alias filter. In (a) the red dashed line is the anti-alias filter transfer function.

Fig. 5
Fig. 5

Recirculating loop structure and receiver layout.

Fig. 6
Fig. 6

Back-to-back performance: BER vs. OSNR (over 0.1 nm).

Fig. 7
Fig. 7

Maximum reach of the center channel (#11) at FEC threshold as a function of the power level (red dots). Maximum reach for all the 20 channels at optimal power level of −6.5dBm (blue squares). Distances are quantized over a discrete number of spans of length equal to 54.44 km.

Fig. 8
Fig. 8

BER for all 20 channels at 24 spans (1306 Km). Inset: signal constellations (both polarizations) for channel #11.

Fig. 9
Fig. 9

Maximum reach prediction based on the GN-model under different conditions: 20 and 400 WDM channels. Red dots: experimental measurement on the center channel of the WDM comb.

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