Abstract

The Nyquist wavelength-division multiplexing technique enable a solution to achieve high spectral efficiency in long-haul transmission system. Compare to polarization division multiplexing quadrature-phase-shift-keying, even high-level modulation scheme such as polarization division multiplexing 16-quadrature-amplitude-modulation is much more sensitive to intra-channel noise and inter-channel linear crosstalk caused by Nyquist wavelength-division multiplexing. We experimentally demonstrated the generation and transmission of the 6 × 128-Gb/s Nyquist wavelength-division multiplexing sixteen quadrature amplitude modulation signal over 1200-km single-mode fiber (SMF)-28 with Erbium-doped fiber amplifier only amplification with a net SE of 7.47 b/s/Hz, which is so far, to our knowledge, the highest SE for the signal with the bit rate above 100-Gb/s using the polarization-division multiplexing 16-quadrature-amplitude-modulation format. This experiment was successfully enabled by digital-signal-processing (DSP) pre-equalization of transmitter-side impairments and DSP post-equalization of the channel and receiver-side impairments. Nyquist-band is considered in the pre- equalization to enhance the tolerance of the polarization-division multiplexing 16-quadrature-amplitude-modulation to the aggressive spectral shaping. The bit error rate for each of the 6 channels is smaller than the limitation of the forward-error-correction limit of 3.8 × 10<sup>-3</sup> after 1200-km SMF-28 transmission.

© 2012 IEEE

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  3. J. Yu, X. Zhou, Y.-K. Huang, S. Gupta, M.-F. Huang, T. Wang, P. Magill, "112.8-Gb/s PM-RZ-64QAM optical signal generation and transmission on a 12.5 GHz WDM grid," Proc. OFC 2010 .
  4. Z. Dong, J. Yu, H.-C. Chien, S. Shi, Y. Xia, C. Ge, "24 Tb/s (24 × 1.3 Tb/s) WDM transmission of terabit PDM-CO-OFDM superchannels over 2400 km SMF-28," Proc. OECC 2011 .
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  6. Z. Dong, J. Yu, Z. Jia, H.-C. Chien, G.-K. Chang, "7 × 224 Gb/s/ch N-WDM transmission over 1600-km SMF-28 using PDM-CSRZ-QPSK modulation," IEEE Photon. Technol. Lett. unpublished.
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2011 (5)

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

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, "On the performance of N-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM subcarriers," J. of Lightw. Technol. 29, 53-61 (2011).

A. H. Gnauck, P. J. Winzer, S. Chandrasekhar, X. Liu, B. Zhu, D. W. Peckham, "Spectrally efficient long-haul WDM transmission using 224-Gb/s polarization-multiplexed 16-QAM," J. Lightw. Technol. 29, 373-377 (2011).

B. Zhu, S. Chandrasekhar, X. Liu, D. W. Peckham, "Transmission performance of a 485-Gb/s CO-OFDM superchannel with PDM-16QAM subcarriers over ULAF and SSMF-based links," IEEE Photon. Technol. Lett. 23, 1400-1402 (2011).

X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, L. Nelson, P. Magill, M. Birk, P. I. Borel, D. W. Peckham, R. Lingle, Jr.B. Zhu, "64-Tb/s, 8 b/s/Hz, PDM-36QAM transmission over 320 km using both pre- and post-transmission digital signal processing," J. Lightw. Technol. 29, 571-577 (2011).

2010 (2)

G. Bosco, A. Carena, V. Curri, P. Poggiolini, F. Forghieri, "Performance limits of N-WDM and CO-OFDM in high-speed PM-QPSK systems," IEEE Photon. Technol. Lett. 22, 1129-1131 (2010).

K. Kikuchi, "Ultra-long-haul optical transmission characteristics of wavelength-division multiplexed dual-polarisation 16-quadrature-amplitude-modulation signals," Electron. Lett. 46, 433-434 (2010).

2009 (1)

X. Zhou, J. Yu, "Multi-level, multi-dimensional coding for high-speed and high-spectral-efficiency optical transmission," J. Lightw. Technol. 27, 3641-3653 (2009).

2008 (1)

C. R. S. Fludger, T. Duthel, D. van den Borne, C. Schulien, E.-D. Schmidt, T. Wuth, J. Geyer, E. De Man, G.-D. Khoe, H. de Waardt, "Coherent equalization and POLMUX-RZ-DQPSK for robust 100-GE transmission," J. Lightw. Technol. 26, 64-72 (2008).

2006 (2)

W. Shieh, C. Athaudage, "Coherent optical orthogonal frequency division multiplexing," Electron. Lett. 42, 587-589 (2006).

J. Yu, Z. Jia, L. Yi, Y. Su, G.-K. Chang, T. Wang, "Optical millimeter-wave generation or up-conversion using external modulators," IEEE Photon. Technol. Lett. 18, 265-267 (2006).

1990 (1)

J. Winters, "Equalization in coherent lightwave systems using a fractionally spaced equalizer," J. Lightw. Technol. 8, 1487-1491 (1990).

Electron. Lett. (1)

W. Shieh, C. Athaudage, "Coherent optical orthogonal frequency division multiplexing," Electron. Lett. 42, 587-589 (2006).

Electron. Lett. (1)

K. Kikuchi, "Ultra-long-haul optical transmission characteristics of wavelength-division multiplexed dual-polarisation 16-quadrature-amplitude-modulation signals," Electron. Lett. 46, 433-434 (2010).

IEEE Photon. Technol. Lett. (1)

J. Yu, Z. Jia, L. Yi, Y. Su, G.-K. Chang, T. Wang, "Optical millimeter-wave generation or up-conversion using external modulators," IEEE Photon. Technol. Lett. 18, 265-267 (2006).

IEEE Photon. Technol. Lett. (1)

G. Bosco, A. Carena, V. Curri, P. Poggiolini, F. Forghieri, "Performance limits of N-WDM and CO-OFDM in high-speed PM-QPSK systems," IEEE Photon. Technol. Lett. 22, 1129-1131 (2010).

IEEE Photon. Technol. Lett. (1)

B. Zhu, S. Chandrasekhar, X. Liu, D. W. Peckham, "Transmission performance of a 485-Gb/s CO-OFDM superchannel with PDM-16QAM subcarriers over ULAF and SSMF-based links," IEEE Photon. Technol. Lett. 23, 1400-1402 (2011).

J. Lightw. Technol. (2)

J. Winters, "Equalization in coherent lightwave systems using a fractionally spaced equalizer," J. Lightw. Technol. 8, 1487-1491 (1990).

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

J. Lightw. Technol. (1)

A. H. Gnauck, P. J. Winzer, S. Chandrasekhar, X. Liu, B. Zhu, D. W. Peckham, "Spectrally efficient long-haul WDM transmission using 224-Gb/s polarization-multiplexed 16-QAM," J. Lightw. Technol. 29, 373-377 (2011).

J. Lightw. Technol. (3)

C. R. S. Fludger, T. Duthel, D. van den Borne, C. Schulien, E.-D. Schmidt, T. Wuth, J. Geyer, E. De Man, G.-D. Khoe, H. de Waardt, "Coherent equalization and POLMUX-RZ-DQPSK for robust 100-GE transmission," J. Lightw. Technol. 26, 64-72 (2008).

X. Zhou, J. Yu, "Multi-level, multi-dimensional coding for high-speed and high-spectral-efficiency optical transmission," J. Lightw. Technol. 27, 3641-3653 (2009).

X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, L. Nelson, P. Magill, M. Birk, P. I. Borel, D. W. Peckham, R. Lingle, Jr.B. Zhu, "64-Tb/s, 8 b/s/Hz, PDM-36QAM transmission over 320 km using both pre- and post-transmission digital signal processing," J. Lightw. Technol. 29, 571-577 (2011).

J. of Lightw. Technol. (1)

G. Bosco, V. Curri, A. Carena, P. Poggiolini, F. Forghieri, "On the performance of N-WDM terabit superchannels based on PM-BPSK, PM-QPSK, PM-8QAM or PM-16QAM subcarriers," J. of Lightw. Technol. 29, 53-61 (2011).

Other (8)

T. Sugihara, T. Kobayashi, Y. Konishi, S. Hirano, K. Tsutsumi, K. Yamagishi, T. Ichikawa, S. Inoue, K. Kubo, Y. Takahashi, K. Goto, T. Fujimori, K. Uto, T. Yoshida, K. Sawada, S. Kametani, H. Bessho, T. Inoue, K. Koguchi, K. Shimizu, T. Mizuochi, "43 Gb/s DQPSK pre-equalization employing 6-bit, 43 GS/s DAC integrated LSI for cascaded ROADM filtering," Proc. OFC 2010 .

R. Cigliutti, A. Nespola, D. Zeolla, G. Bosco, A. Carena, V. Curri, F. Forghieri, Y. Yamamoto, T. Sasaki, P. Poggiolini, "Ultra-long-haul transmission of 16 × 112 Gb/s spectrally-engineered DAC-generated nyquist-WDM PM-16QAM channels with 1.05$\times$ (symbol-rate) frequency spacing," Proc. OFC 2012 .

"Forward error correction for high bit-rate DWDM submarine system," (2004) ITU-T Rec. G.975.1.

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 × 112 Gb/s transmission over 9 360 km with channel spacing set to the baud rate (360% spectral efficiency)," Proc. ECOC 2010 () pp. 1-3.

J. Yu, X. Zhou, Y.-K. Huang, S. Gupta, M.-F. Huang, T. Wang, P. Magill, "112.8-Gb/s PM-RZ-64QAM optical signal generation and transmission on a 12.5 GHz WDM grid," Proc. OFC 2010 .

Z. Dong, J. Yu, H.-C. Chien, S. Shi, Y. Xia, C. Ge, "24 Tb/s (24 × 1.3 Tb/s) WDM transmission of terabit PDM-CO-OFDM superchannels over 2400 km SMF-28," Proc. OECC 2011 .

Z. Dong, J. Yu, Z. Jia, H.-C. Chien, G.-K. Chang, "7 × 224 Gb/s/ch N-WDM transmission over 1600-km SMF-28 using PDM-CSRZ-QPSK modulation," IEEE Photon. Technol. Lett. unpublished.

V. Curri, A. Carena, G. Bosco, P. Poggiolini, F. Forghieri, "Nonlinear propagation of 1 Tbps superchannels based on 240 Gbps PM-16QAM subcarriers on PSCF with hybrid Erbium/Raman fiber amplification," Proc. ECOC 2010 (2010).

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