Abstract

We demonstrate that channel spacing can be reduced to values smaller than the Nyquist channel spacing over transoceanic distance. Modulation memory induced by constrained transmitter bandwidth together with multisymbol detection can reduce intersymbol interference for systems with sub-Nyquist channel spacing. We transmit 198 × 100 G bandwidth constrained polarization-division-multiplexed return-to-zero quaternary phase shift keying channels with 400% spectral efficiency over 6860 km using 52 km spans of 150 μm<sup>2</sup> fiber and simple single-stage erbium-doped fiber amplifiers without any Raman amplification. We also show that 100 G coherent nonlinear performance scales differently with distance on uncompensated dispersion maps compared with direct detection transmission.

© 2011 IEEE

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  1. D. Qian, M. Huang, E. Ip, Y. Huang, Y. Shao, J. Hu, T. Wang, "101.7-Tb/s (370$\,\times\,$294-Gb/s) PDM-128QAM-OFDM transmission over 3$\,\times\,$55-km SSMF using pilot-based phase noise mitigation," Opt. Fiber Commun. Conf. Los AngelesCA (2011) post-deadline paper PDP-B5.
  2. M. Salsi, H. Mardoyan, P. Tran, C. Koebele, E. Dutisseuil, G. Charlet, S. Bigo, "155$\,\times\,$100 Gbit/s coherent PDM-QPSK transmission over 7 200 km," Eur. Conf. Opt. Commun. ViennaAustria (2009) paper PD2.5.
  3. J.-X. Cai, Y. Cai, Y. Sun, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. S. Bergano, "112$\,\times\,$112 Gb/s transmission over 9360 km with channel spacing set to the baud rate (360% spectral efficiency)," Proc. Eur. Conf. Opt. Commun. (2010) pp. 1-3.
  4. A. H. Gnauck, G. Raybon, S. Chandrasekhar, J. Leuthold, C. Doerr, L. Stulz, A. Agarwal, S. Banerjee, D. Grosz, S. Hunsche, A. Kung, A. Marhelyuk, D. Maywar, M. Movassaghi, X. Liu, C. Xu, X. Wei, D. M. Gill, "2.5 Tb/s (64$\,\times\,$42.7 Gb/s) transmission over 40$\,\times\,$100 km NZDSF using RZ-DPSK format and all-Raman-amplified spans," Opt. Fiber. Commun. Conf. AnaheimCA (2002) post-deadline paper FC2.
  5. M. G. Taylor, "Coherent detection method using DSP for demodulation of signal and subsequent equalization of propagation impairments," IEEE Photon. Technol. Lett. 16, 674-676 (2004).
  6. C. Laperle, B. Villeneuve, Z. Zhang, D. McGhan, H. Sun, M. O'Sullivan, "WDM performance and PMD tolerance of a coherent 40-Gbit/s dual-polarization QPSK transceiver," J. Lightw. Technol. 26, 168-175 (2008).
  7. J.-X. Cai, Y. Cai, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. Bergano, "Transmission of 96$\,\times\,$100-Gb/s bandwidth-constrained PDM-RZ-QPSK channels with 300% spectral efficiency over 10610 km and 400% spectral efficiency over 4370 km," J. Lightw. Technol. 29, 491-498 (2011).
  8. S. Chandrasekhar, X. Liu, B. Zhu, D. W. Peckham, "Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber," Eur. Conf. Opt. Commun. ViennaAustria (2009) paper PD2.6.
  9. H. Masuda, E. Yamazaki, A. Sano, T. Yoshimatsu, T. Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, Y. Takatori, M. Mizoguchi, K. Okada, K. Hagimoto, T. Yamada, S. Kamei, "13.5-Tb/s (135$\,\times\,$111-Gb/s/ch) no-guard-interval coherent OFDM transmission over 6 248 km using SNR maximized second-order DRA in the extended L-band," Opt. Fiber. Commun. Conf./Nat. Fiber Opt. Eng. Conf. San DiegoCA (2009) paper PDPB5.
  10. J.-X. Cai, Y. Cai, C. Davidson, A. Lucero, H. Zhang, D. Foursa, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. Bergano, "20 Tbit/s capacity transmission over 6 860 km," Proc. Opt. Fiber Commun Conf. (2011) pp. 1-3.
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  12. Y. Cai, J.-X. Cai, C. R. Davidson, D. Foursa, A. Lucero, O. Sinkin, A. Pilipetskii, G. Mohs, N. S. Bergano, "High spectral efficiency long-haul transmission with pre filtering and maximum a posteriori probability detection," Eur. Conf. Opt. Commun. TorinoItaly (2010) paper We.7.C.4..
  13. G. D. Forney, Jr."Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference," IEEE Trans. Inf. Theory IT-18, 363-378 (1972).
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  15. Y. Cai, D. G. Foursa, C. R. Davidson, J.-X. Cai, O. Sinkin, M. Nissov, A. Pilipetskii, "Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmissions," Opt. Fiber Commun. Conf./Nat. Fiber Opt. Eng. Conf. San DiegoCA (2010) paper OTuE1.
  16. J. G. Proakis, Digital Communications (McGraw-Hill, 1995).
  17. Y. Cai, J.-X. Cai, A. Pilipetskii, G. Mohs, N. S. Bergano, "Spectral efficiency limits of pre-filtered modulation formats," Opt. Exp. 18, 20273-20281 (2010).
  18. F. Chang, K. Onohara, T. Mizuochi, "Forward error correction for 100 G transport networks," IEEE Commun. Mag. 48, S48-S55 (2010).
  19. H. Zhang, Y. Cai, D. Foursa, A. Pilipetskii, "Cycle slip mitigation in POLMUX-QPSK modulation," Opt. Fiber Commun. Conf./Nat. Fiber Opt. Eng. Conf. Los AngelesCA (2011) paper OMJ7.
  20. O. Sinkin, J.-X. Cai, D. Foursa, H. Zhang, A. Pilipetskii, G. Mohs, N. Bergano, “Scaling of nonlinear impairments in dispersion uncompensated long-haul transmission,” to be presented at the Opt. Fiber Commun. Conf./Nat. Fiber Opt. Conf., Los Angeles, CA (2012) paper OTu1A.2.

2011 (1)

J.-X. Cai, Y. Cai, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. Bergano, "Transmission of 96$\,\times\,$100-Gb/s bandwidth-constrained PDM-RZ-QPSK channels with 300% spectral efficiency over 10610 km and 400% spectral efficiency over 4370 km," J. Lightw. Technol. 29, 491-498 (2011).

2010 (3)

N. Alic, M. Karlsson, M. Skold, O. Milenkovic, P. Andrekson, S. Radic, "Joint statistics and MLSD in filtered incoherent high-speed fiber-optic communications," J. Lightw. Technol. 28, 1564-1572 (2010).

Y. Cai, J.-X. Cai, A. Pilipetskii, G. Mohs, N. S. Bergano, "Spectral efficiency limits of pre-filtered modulation formats," Opt. Exp. 18, 20273-20281 (2010).

F. Chang, K. Onohara, T. Mizuochi, "Forward error correction for 100 G transport networks," IEEE Commun. Mag. 48, S48-S55 (2010).

2008 (1)

C. Laperle, B. Villeneuve, Z. Zhang, D. McGhan, H. Sun, M. O'Sullivan, "WDM performance and PMD tolerance of a coherent 40-Gbit/s dual-polarization QPSK transceiver," J. Lightw. Technol. 26, 168-175 (2008).

2004 (1)

M. G. Taylor, "Coherent detection method using DSP for demodulation of signal and subsequent equalization of propagation impairments," IEEE Photon. Technol. Lett. 16, 674-676 (2004).

1983 (1)

A. J. Viterbi, A. M. Viterbi, "Nonlinear estimation of PSK-modulated carrier phase with application to burst digital transmission," IEEE Trans. Inf. Theory IT-29, 543-551 (1983).

1972 (1)

G. D. Forney, Jr."Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference," IEEE Trans. Inf. Theory IT-18, 363-378 (1972).

IEEE Commun. Mag. (1)

F. Chang, K. Onohara, T. Mizuochi, "Forward error correction for 100 G transport networks," IEEE Commun. Mag. 48, S48-S55 (2010).

IEEE Photon. Technol. Lett. (1)

M. G. Taylor, "Coherent detection method using DSP for demodulation of signal and subsequent equalization of propagation impairments," IEEE Photon. Technol. Lett. 16, 674-676 (2004).

IEEE Trans. Inf. Theory (2)

A. J. Viterbi, A. M. Viterbi, "Nonlinear estimation of PSK-modulated carrier phase with application to burst digital transmission," IEEE Trans. Inf. Theory IT-29, 543-551 (1983).

G. D. Forney, Jr."Maximum-likelihood sequence estimation of digital sequences in the presence of intersymbol interference," IEEE Trans. Inf. Theory IT-18, 363-378 (1972).

J. Lightw. Technol. (3)

N. Alic, M. Karlsson, M. Skold, O. Milenkovic, P. Andrekson, S. Radic, "Joint statistics and MLSD in filtered incoherent high-speed fiber-optic communications," J. Lightw. Technol. 28, 1564-1572 (2010).

C. Laperle, B. Villeneuve, Z. Zhang, D. McGhan, H. Sun, M. O'Sullivan, "WDM performance and PMD tolerance of a coherent 40-Gbit/s dual-polarization QPSK transceiver," J. Lightw. Technol. 26, 168-175 (2008).

J.-X. Cai, Y. Cai, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. Bergano, "Transmission of 96$\,\times\,$100-Gb/s bandwidth-constrained PDM-RZ-QPSK channels with 300% spectral efficiency over 10610 km and 400% spectral efficiency over 4370 km," J. Lightw. Technol. 29, 491-498 (2011).

Opt. Exp. (1)

Y. Cai, J.-X. Cai, A. Pilipetskii, G. Mohs, N. S. Bergano, "Spectral efficiency limits of pre-filtered modulation formats," Opt. Exp. 18, 20273-20281 (2010).

Other (12)

S. Chandrasekhar, X. Liu, B. Zhu, D. W. Peckham, "Transmission of a 1.2-Tb/s 24-carrier no-guard-interval coherent OFDM superchannel over 7200-km of ultra-large-area fiber," Eur. Conf. Opt. Commun. ViennaAustria (2009) paper PD2.6.

H. Masuda, E. Yamazaki, A. Sano, T. Yoshimatsu, T. Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, Y. Takatori, M. Mizoguchi, K. Okada, K. Hagimoto, T. Yamada, S. Kamei, "13.5-Tb/s (135$\,\times\,$111-Gb/s/ch) no-guard-interval coherent OFDM transmission over 6 248 km using SNR maximized second-order DRA in the extended L-band," Opt. Fiber. Commun. Conf./Nat. Fiber Opt. Eng. Conf. San DiegoCA (2009) paper PDPB5.

J.-X. Cai, Y. Cai, C. Davidson, A. Lucero, H. Zhang, D. Foursa, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. Bergano, "20 Tbit/s capacity transmission over 6 860 km," Proc. Opt. Fiber Commun Conf. (2011) pp. 1-3.

D. Qian, M. Huang, E. Ip, Y. Huang, Y. Shao, J. Hu, T. Wang, "101.7-Tb/s (370$\,\times\,$294-Gb/s) PDM-128QAM-OFDM transmission over 3$\,\times\,$55-km SSMF using pilot-based phase noise mitigation," Opt. Fiber Commun. Conf. Los AngelesCA (2011) post-deadline paper PDP-B5.

M. Salsi, H. Mardoyan, P. Tran, C. Koebele, E. Dutisseuil, G. Charlet, S. Bigo, "155$\,\times\,$100 Gbit/s coherent PDM-QPSK transmission over 7 200 km," Eur. Conf. Opt. Commun. ViennaAustria (2009) paper PD2.5.

J.-X. Cai, Y. Cai, Y. Sun, C. R. Davidson, D. G. Foursa, A. Lucero, O. Sinkin, W. Patterson, A. Pilipetskii, G. Mohs, N. S. Bergano, "112$\,\times\,$112 Gb/s transmission over 9360 km with channel spacing set to the baud rate (360% spectral efficiency)," Proc. Eur. Conf. Opt. Commun. (2010) pp. 1-3.

A. H. Gnauck, G. Raybon, S. Chandrasekhar, J. Leuthold, C. Doerr, L. Stulz, A. Agarwal, S. Banerjee, D. Grosz, S. Hunsche, A. Kung, A. Marhelyuk, D. Maywar, M. Movassaghi, X. Liu, C. Xu, X. Wei, D. M. Gill, "2.5 Tb/s (64$\,\times\,$42.7 Gb/s) transmission over 40$\,\times\,$100 km NZDSF using RZ-DPSK format and all-Raman-amplified spans," Opt. Fiber. Commun. Conf. AnaheimCA (2002) post-deadline paper FC2.

Y. Cai, D. G. Foursa, C. R. Davidson, J.-X. Cai, O. Sinkin, M. Nissov, A. Pilipetskii, "Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmissions," Opt. Fiber Commun. Conf./Nat. Fiber Opt. Eng. Conf. San DiegoCA (2010) paper OTuE1.

J. G. Proakis, Digital Communications (McGraw-Hill, 1995).

Y. Cai, J.-X. Cai, C. R. Davidson, D. Foursa, A. Lucero, O. Sinkin, A. Pilipetskii, G. Mohs, N. S. Bergano, "High spectral efficiency long-haul transmission with pre filtering and maximum a posteriori probability detection," Eur. Conf. Opt. Commun. TorinoItaly (2010) paper We.7.C.4..

H. Zhang, Y. Cai, D. Foursa, A. Pilipetskii, "Cycle slip mitigation in POLMUX-QPSK modulation," Opt. Fiber Commun. Conf./Nat. Fiber Opt. Eng. Conf. Los AngelesCA (2011) paper OMJ7.

O. Sinkin, J.-X. Cai, D. Foursa, H. Zhang, A. Pilipetskii, G. Mohs, N. Bergano, “Scaling of nonlinear impairments in dispersion uncompensated long-haul transmission,” to be presented at the Opt. Fiber Commun. Conf./Nat. Fiber Opt. Conf., Los Angeles, CA (2012) paper OTu1A.2.

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