Abstract

We report the transmission of time domain hybrid QAM (TDHQ) signals for agile optical networks. A continuous tradeoff between spectral efficiency and achievable distance by mixing modulation formats including QPSK, 8QAM, and 16QAM is demonstrated in two scenarios: 1) 28 Gbaud non-return-to-zero (NRZ) signal for fixed 50 GHz grid systems; 2) superchannel transmission at date rates of up to 1.15 Tb/s and spectral efficiencies of up to 7.68 b/s/Hz. The TDHQ signal is generated using high-speed digital-to-analog converters (DACs) at the transmitter, and low-complexity digital signal processing (DSP) is proposed for processing the TDHQ signals at the receiver. Moreover, the nonlinearity tolerance of hybrid QAM signals with different configurations is investigated.

© 2013 IEEE

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  13. W.-R. Peng, I. Morita, H. Tanaka, "Hybrid QAM transmission techniques for single-carrier ultra-dense WDM systems," Proc. 2011 Optoelectron. Commun. Conf. pp. 824-825.
  14. X. Zhou, L. E. Nelson, R. Isaac, P. D. Magill, B. Zhu, D. W. Peckham, P. Borel, K. Carlson, "4000 km transmission of 50 GHz spaced, 10 $\,\times\,$ 494.85-Gb/s hybrid 32-64QAM using cascaded equalization and training-assisted phase recovery," Proc. 2012 IEEE/OSA Opt. Fiber Commun. Conf. .
  15. Q. Zhuge, X. Xu, M. Morsy-Osman, M. Chagnon, M. Qiu, D. V. Plant, "Time domain hybrid QAM based rate-adaptive optical transmissions using high speed DACs," Proc. 2013 IEEE/OSA Opt. Fiber Commun. Conf. .
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  17. I. Fatadin, S. J. Savory, D. Ives, "Compensation of quadrature imbalance in an optical QPSK coherent receiver," IEEE Photon. Technol. Lett. 20, 1733-1735 (2008).
  18. T. Tanimura, S. Oda, T. Tanaka, T. Hoshida, T. Zhenning, J. C. Rasmussen, "A simple digital skew compensator for coherent receiver," Proc. 2009 Eur. Conf. Opt. Commun. .
  19. R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, Y. Miyamoto, "Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems," J. Lightw. Technol. 27, 3721-3728 (2009).
  20. R. A. Soriano, F. N. Hauske, N. G. Gonzalez, Z. Zhuhong, Y. Yabin, I. T. Monroy, "Chromatic dispersion estimation in digital coherent receivers," J. Lightw. Technol. 29, 1627-1637 (2011).
  21. Q. Sui, A. P. T. Lau, C. Lu, "Fast and robust blind chromatic dispersion estimation using auto-correlation of signal power waveform for digital coherent systems," J. Lightw. Technol. 31, 306-312 (2013).
  22. T. Nakagawa, M. Matsui, T. Kobayashi, K. Ishihara, R. Kudo, M. Mizoguchi, Y. Miyamoto, "Non-data-aided wide-range frequency offset estimator for QAM optical coherent receivers," Proc. 2011 IEEE/OSA Opt. Fiber Commun. Conf. .
  23. M. Morsy-Osman, Q. Zhuge, M. Chagnon, X. Xu, D. Plant, "Experimental demonstration of pilot-aided polarization recovery, frequency offset and phase noise mitigation," Proc. 2013 IEEE/OSA Opt. Fiber Commun. Conf. .
  24. T. M. Schmidl, D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun. 45, 1613-1621 (1997).
  25. T. Pfau, S. Hoffmann, R. Noe, "Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for M-QAM constellations," J. Lightw. Technol. 27, 989-999 (2009).
  26. M. Kuschnerov, M. Chouayakh, K. Piyawanno, B. Spinnler, E. de Man, P. Kainzmaier, M. S. Alfiad, A. Napoli, B. Lankl, "Data-aided versus blind single-carrier coherent receivers," IEEE Photon. J. 2, 387-403 (2010).
  27. M. G. Taylor, "Phase estimation methods for optical coherent detection using digital signal processing," J. Lightw. Technol. 27, 901-914 (2009).
  28. Q. Zhuge, M. Morsy-Osman, X. Xu, M. E. Mousa-Pasandi, M. Chagnon, Z. A. El-Sahn, D. V. Plant, "Pilot-aided carrier phase recovery for M-QAM using superscalar parallelization based PLL," Opt. Exp. 20, 19599-19609 (2012).
  29. F. Chang, K. Onohara, T. Mizuochi, "Forward error correction for 100 G transport networks," IEEE Commun. Mag. 48, S48-S55 (2010).

2013 (2)

X. Zhou, L. E. Nelson, P. Magill, "Rate-adaptable optics for next generation long-haul transport networks," IEEE Commun. Mag. 51, 41-49 (2013).

Q. Sui, A. P. T. Lau, C. Lu, "Fast and robust blind chromatic dispersion estimation using auto-correlation of signal power waveform for digital coherent systems," J. Lightw. Technol. 31, 306-312 (2013).

2012 (4)

Q. Zhuge, M. Morsy-Osman, X. Xu, M. E. Mousa-Pasandi, M. Chagnon, Z. A. El-Sahn, D. V. Plant, "Pilot-aided carrier phase recovery for M-QAM using superscalar parallelization based PLL," Opt. Exp. 20, 19599-19609 (2012).

O. Gerstel, M. Jinno, A. Lord, S. J. B. Yoo, "Elastic optical networking: a new dawn for the optical layer?," IEEE Commun. Mag. 50, s12-s20 (2012).

H. Y. Choi, T. Tsuritani, I. Morita, "BER-adaptive flexible-format transmitter for elastic optical networks," Opt. Exp. 20, 18652-18658 (2012).

G. Gwang-Hyun, J. M. Kahn, "Rate-adaptive modulation and coding for optical fiber transmission systems," J. Lightw. Technol. 30, 1818-1828 (2012).

2011 (3)

S. Chandrasekhar, A. H. Gnauck, X. Liu, P. J. Winzer, Y. Pan, E. C. Burrows, T. F. Taunay, B. Zhu, M. Fishteyn, M. F. Yan, J. M. Fini, E. M. Monberg, F. V. Dimarcello, "WDM/SDM transmission of 10 $\,\times\,$ 128-Gb/s PDM-QPSK over 2688-km 7-core fiber with a per-fiber net aggregate spectral-efficiency distance product of 40,320 ${\rm km} \cdot {\rm b}/{\rm s}/{\rm Hz}$ ," Opt. Exp. 20, 706-711 (2011).

M. Jinno, T. Ohara, Y. Sone, A. Hirano, O. Ishida, M. Tomizawa, "Elastic and adaptive optical networks: possible adoption scenarios and future standardization aspects," IEEE Commun. Mag. 49, 164-172 (2011).

R. A. Soriano, F. N. Hauske, N. G. Gonzalez, Z. Zhuhong, Y. Yabin, I. T. Monroy, "Chromatic dispersion estimation in digital coherent receivers," J. Lightw. Technol. 29, 1627-1637 (2011).

2010 (2)

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

M. Kuschnerov, M. Chouayakh, K. Piyawanno, B. Spinnler, E. de Man, P. Kainzmaier, M. S. Alfiad, A. Napoli, B. Lankl, "Data-aided versus blind single-carrier coherent receivers," IEEE Photon. J. 2, 387-403 (2010).

2009 (3)

M. G. Taylor, "Phase estimation methods for optical coherent detection using digital signal processing," J. Lightw. Technol. 27, 901-914 (2009).

T. Pfau, S. Hoffmann, R. Noe, "Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for M-QAM constellations," J. Lightw. Technol. 27, 989-999 (2009).

R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, Y. Miyamoto, "Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems," J. Lightw. Technol. 27, 3721-3728 (2009).

2008 (1)

I. Fatadin, S. J. Savory, D. Ives, "Compensation of quadrature imbalance in an optical QPSK coherent receiver," IEEE Photon. Technol. Lett. 20, 1733-1735 (2008).

1997 (1)

T. M. Schmidl, D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun. 45, 1613-1621 (1997).

IEEE Commun. Mag. (2)

M. Jinno, T. Ohara, Y. Sone, A. Hirano, O. Ishida, M. Tomizawa, "Elastic and adaptive optical networks: possible adoption scenarios and future standardization aspects," IEEE Commun. Mag. 49, 164-172 (2011).

X. Zhou, L. E. Nelson, P. Magill, "Rate-adaptable optics for next generation long-haul transport networks," IEEE Commun. Mag. 51, 41-49 (2013).

IEEE Commun. Mag. (2)

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

O. Gerstel, M. Jinno, A. Lord, S. J. B. Yoo, "Elastic optical networking: a new dawn for the optical layer?," IEEE Commun. Mag. 50, s12-s20 (2012).

IEEE Photon. Technol. Lett. (1)

I. Fatadin, S. J. Savory, D. Ives, "Compensation of quadrature imbalance in an optical QPSK coherent receiver," IEEE Photon. Technol. Lett. 20, 1733-1735 (2008).

IEEE Photon. J. (1)

M. Kuschnerov, M. Chouayakh, K. Piyawanno, B. Spinnler, E. de Man, P. Kainzmaier, M. S. Alfiad, A. Napoli, B. Lankl, "Data-aided versus blind single-carrier coherent receivers," IEEE Photon. J. 2, 387-403 (2010).

IEEE Trans. Commun. (1)

T. M. Schmidl, D. C. Cox, "Robust frequency and timing synchronization for OFDM," IEEE Trans. Commun. 45, 1613-1621 (1997).

J. Lightw. Technol. (1)

G. Gwang-Hyun, J. M. Kahn, "Rate-adaptive modulation and coding for optical fiber transmission systems," J. Lightw. Technol. 30, 1818-1828 (2012).

J. Lightw. Technol. (5)

R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, Y. Miyamoto, "Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems," J. Lightw. Technol. 27, 3721-3728 (2009).

R. A. Soriano, F. N. Hauske, N. G. Gonzalez, Z. Zhuhong, Y. Yabin, I. T. Monroy, "Chromatic dispersion estimation in digital coherent receivers," J. Lightw. Technol. 29, 1627-1637 (2011).

Q. Sui, A. P. T. Lau, C. Lu, "Fast and robust blind chromatic dispersion estimation using auto-correlation of signal power waveform for digital coherent systems," J. Lightw. Technol. 31, 306-312 (2013).

T. Pfau, S. Hoffmann, R. Noe, "Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for M-QAM constellations," J. Lightw. Technol. 27, 989-999 (2009).

M. G. Taylor, "Phase estimation methods for optical coherent detection using digital signal processing," J. Lightw. Technol. 27, 901-914 (2009).

Opt. Exp. (2)

Q. Zhuge, M. Morsy-Osman, X. Xu, M. E. Mousa-Pasandi, M. Chagnon, Z. A. El-Sahn, D. V. Plant, "Pilot-aided carrier phase recovery for M-QAM using superscalar parallelization based PLL," Opt. Exp. 20, 19599-19609 (2012).

H. Y. Choi, T. Tsuritani, I. Morita, "BER-adaptive flexible-format transmitter for elastic optical networks," Opt. Exp. 20, 18652-18658 (2012).

Opt. Exp. (1)

S. Chandrasekhar, A. H. Gnauck, X. Liu, P. J. Winzer, Y. Pan, E. C. Burrows, T. F. Taunay, B. Zhu, M. Fishteyn, M. F. Yan, J. M. Fini, E. M. Monberg, F. V. Dimarcello, "WDM/SDM transmission of 10 $\,\times\,$ 128-Gb/s PDM-QPSK over 2688-km 7-core fiber with a per-fiber net aggregate spectral-efficiency distance product of 40,320 ${\rm km} \cdot {\rm b}/{\rm s}/{\rm Hz}$ ," Opt. Exp. 20, 706-711 (2011).

Other (13)

H. Takara, A. Sano, T. Kobayashi, H. Kubota, H. Kawakami, A. Matsuura, Y. Miyamoto, Y. Abe, H. Ono, K. Shikama, Y. Goto, K. Tsujikawa, Y. Sasaki, I. Ishida, K. Takenaga, S. Matsuo, K. Saitoh, M. Koshiba, T. Morioka, "1.01-Pb/s (12 SDM/222 WDM/456 Gb/s) crosstalk-managed transmission with 91.4-b/s/Hz aggregate spectral efficiency," Proc. 2012 Eur. Conf. Exhib. Opt. Commun. .

D. Qian, E. Ip, M. Huang, M. Li, A. Dogariu, S. Zhang, Y. Shao, Y. Huang, Y. Zhang, X. Cheng, Y. Tian, P. Ji, A. Collier, Y. Geng, J. Linares, C. Montero, V. Moreno, X. Prieto, T. Wang, "1.05 Pb/s transmission with 109 b/s/Hz spectral efficiency using hybrid single- and few-mode cores," Proc. Frontiers Opt. 2012 .

D. Qian, M.-F. Huang, E. Ip, Y.-K. 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," Proc. 2011 IEEE/OSA Opt. Fiber Commun. Conf. .

K. Roberts, C. Laperle, "Flexible transceivers," Proc. 2012 Eur. Conf. Exhib. Opt. Commun. .

International Telecommunication UnionSpectral Grids for WDM Applications: DWDM Frequency Grid, ITU-T recommendation G.694.1 (2002).

D. L. McGhan, W. Leckie, C. Chen, "Reconfigurable coherent transceivers for optical transmission capacity and reach optimization," Proc. 2012 IEEE/OSA Opt. Fiber Commun. Conf. .

Y. Huang, E. Ip, P. N. Ji, Y. Shao, T. Wang, Y. Aono, Y. Yano, T. Tajima, "Terabit/s optical superchannel with flexible modulation format for dynamic distance/route transmission," Proc. 2012 IEEE/OSA Opt. Fiber Commun. Conf. .

T. Nakagawa, M. Matsui, T. Kobayashi, K. Ishihara, R. Kudo, M. Mizoguchi, Y. Miyamoto, "Non-data-aided wide-range frequency offset estimator for QAM optical coherent receivers," Proc. 2011 IEEE/OSA Opt. Fiber Commun. Conf. .

M. Morsy-Osman, Q. Zhuge, M. Chagnon, X. Xu, D. Plant, "Experimental demonstration of pilot-aided polarization recovery, frequency offset and phase noise mitigation," Proc. 2013 IEEE/OSA Opt. Fiber Commun. Conf. .

W.-R. Peng, I. Morita, H. Tanaka, "Hybrid QAM transmission techniques for single-carrier ultra-dense WDM systems," Proc. 2011 Optoelectron. Commun. Conf. pp. 824-825.

X. Zhou, L. E. Nelson, R. Isaac, P. D. Magill, B. Zhu, D. W. Peckham, P. Borel, K. Carlson, "4000 km transmission of 50 GHz spaced, 10 $\,\times\,$ 494.85-Gb/s hybrid 32-64QAM using cascaded equalization and training-assisted phase recovery," Proc. 2012 IEEE/OSA Opt. Fiber Commun. Conf. .

Q. Zhuge, X. Xu, M. Morsy-Osman, M. Chagnon, M. Qiu, D. V. Plant, "Time domain hybrid QAM based rate-adaptive optical transmissions using high speed DACs," Proc. 2013 IEEE/OSA Opt. Fiber Commun. Conf. .

T. Tanimura, S. Oda, T. Tanaka, T. Hoshida, T. Zhenning, J. C. Rasmussen, "A simple digital skew compensator for coherent receiver," Proc. 2009 Eur. Conf. Opt. Commun. .

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