Abstract

We propose a novel coherent optical orthogonal frequency-division multiplexing (CO-OFDM) scheme with reduced guard interval (RGI) for high-speed high-spectral-efficiency long-haul optical transmission. In this scheme, fiber chromatic dispersion is compensated for within the receiver rather than being accommodated by the guard interval (GI) as in conventional CO-OFDM, thereby reducing the needed GI, especially when fiber dispersion is large. We demonstrate the generation of a 448-Gb/s RGI-CO-OFDM signal with 16-QAM subcarrier modulation through orthogonal band multiplexing. This signal occupies an optical bandwidth of 60 GHz, and is transmitted over 2000 km of ultra-large-area fiber (ULAF) with five passes through an 80-GHz-grid wavelength-selective switch. Banded digital coherent detection with two detection bands is used to receive this 448-Gb/s signal. Wavelength-division multiplexed transmission of three 80-GHz spaced 448-Gb/s RGI-CO-OFDM channels is also demonstrated, achieving a net system spectral efficiency of 5.2b/s/Hz and a transmission distance of 1600 km of ULAF.

© 2010 IEEE

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  1. A. R. Chraplyvy, "The coming capacity crunch," ECOC Plenary Talk (2009).
  2. R. W. Tkach, "Scaling optical communications for the next decade and beyond," Bell Labs Tech. J. 14, 3-10 (2010).
  3. A. D. Ellis, F. C. G. Gunning, B. Cuenot, T. C. Healy, E. Pincemin, "Towards 1TbE using coherent WDM," Proc. OECC/ACOFT 2008 (2008).
  4. Y. Ma, Q. Yang, Y. Tang, S. Chen, W. Shieh, "1-Tb/s per channel coherent optical OFDM transmission with subwavelength bandwidth access," Proc. OFC'09 .
  5. R. Dischler, F. Buchali, "Transmission of 1.2 Tb/s continuous waveband PDM-OFDM-FDM signal with spectral efficiency of 3.3 bit/s/Hz over 400 km of SSMF," Proc. OFC'09 .
  6. A. Sano, E. Yamada, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, Y. Miyamoto, R. Kudo, K. Ishihara, Y. Takatori, "No-guard-interval coherent optical OFDM for 100-Gb/s long-haul WDM transmission," J. Lightw. Technol. 27, 3705-3713 (2009).
  7. J. D'Ambrosia, "100 gagabit ethernet and beyond," IEEE Commun. Mag. 48, S6-S13 (2010).
  8. P. J. Winzer, "Beyond 100G ethernet," IEEE Commun. Mag. 48, 26-30 (2010).
  9. 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," Proc. ECOC'09 .
  10. A. H. Gnauck, P. J. Winzer, C. R. Doerr, L. L. Buhl, "10$\,\times\,$112-Gb/s PDM 16-QAM transmission over 630 km of fiber with 6.2-b/s/Hz spectral efficiency," Proc. OFC'09 .
  11. H. Takahashi, "DWDM transmission with 7.0-bit/s/Hz spectral efficiency using 8$\,\times\,$65.1-Gb/s coherent PDM-OFDM signals," Proc. OFC'09 .
  12. X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, L. Nelson, P. Magill, M. Birk, P. I. Borel, D. W. Peckham, R. Lingle, "64-Tb/s (640$\,\times\,$107-Gb/s) PDM-36QAM transmission over 320 km using both pre- and post-transmission digital equalization," Proc. OFC'10 .
  13. A. Sano, "240-Gb/s polarization-multiplexed 64-QAM modulation and blind detection using PLC-LN hybrid integrated modulator and digital coherent receiver," Proc. ECOC'09 .
  14. X. Liu, S. Chandrasekhar, B. Zhu, P. J. Winzer, A. H. Gnauck, D. W. Peckham, "Transmission of a 448-Gb/s reduced-guard-interval CO-OFDM signal with a 60-GHz optical bandwidth over 2000 km of ULAF and five 80-GHz-grid ROADMs," Proc. OFC'10 .
  15. W. Shieh, H. Bao, Y. Tang, "Coherent optical OFDM: Theory and design," Opt. Exp. 16, 841-859 (2008).
  16. S. L. Jansen, I. Morita, T. C. Schenk, H. Tanaka, "Long-haul transmission of 16$\,\times\,$52.5 Gbits/s polarization-division- multiplexed OFDM enabled by MIMO processing (Invited)," J. Opt. Netw. 7, 173-182 (2008).
  17. P. Poggiolini, A. Carena, V. Curri, F. Forghieri, "Evaluation of the computational effort for chromatic dispersion compensation in coherent optical PM-OFDM and PM-QAM systems," Opt. Exp. 17, 1385-1403 (2009).
  18. R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, Y. Miyamoto, "Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems," J. Lightw. Technol. 27, 3721-3728 (2009).
  19. X. Liu, F. Buchali, "Intra-symbol frequency-domain averaging based channel estimation for coherent optical OFDM," Opt. Exp. 16, 21944-21957 (2008).
  20. http://cp.literature.agilent.com/litweb/pdf/5990-5512EN.pdf.
  21. X. Liu, F. Buchali, R. W. Tkach, "Improving the nonlinear tolerance of polarization-division-multiplexed CO-OFDM in long-haul fiber transmission," J. Lightw. Technol. 27, 3632-3640 (2009).
  22. A. J. Lowery, "Fiber nonlinearity pre- and post-compensation for long-haul optical links using OFDM," Opt. Exp. 15, 12965 (2007).
  23. S. Oda, T. Tanimura, T. Hoshida, C. Ohshima, H. Nakashima, Z. Tao, J. C. Rasmussen, "112 Gb/s DP-QPSK transmission using a novel nonlinear compensator in digital coherent receiver," Proc. OFC'09 .
  24. D. S. Millar, S. Makovejs, V. Mikhailov, R. I. Killey, P. Bayvel, S. J. Savory, "Experimental comparison of nonlinear compensation in long-haul PDM-QPSK transmission at 42.7 and 85.4 Gb/s," Proc. ECOC'09 .
  25. H. Sun, K.-T. Wu, K. Roberts, "Real-time measurements of a 40 Gb/s coherent system," Opt. Exp. 16, 873-879 (2008).
  26. ITU-T Recommendation G.975.1 (2004) Appendix I.9.
  27. X. Liu, S. Chandrasekhar, B. Zhu, P. J. Winzer, D. W. Peckham, "7$\,\times\,$224-Gb/s WDM transmission of reduced-guard-interval CO-OFDM with 16-QAM subcarrier modulation on a 50-GHz Grid over 2000 km of ULAF and five ROADM passes," ECOC'10 Paper Tu.3.C.2.

2010

R. W. Tkach, "Scaling optical communications for the next decade and beyond," Bell Labs Tech. J. 14, 3-10 (2010).

J. D'Ambrosia, "100 gagabit ethernet and beyond," IEEE Commun. Mag. 48, S6-S13 (2010).

P. J. Winzer, "Beyond 100G ethernet," IEEE Commun. Mag. 48, 26-30 (2010).

2009

A. Sano, E. Yamada, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, Y. Miyamoto, R. Kudo, K. Ishihara, Y. Takatori, "No-guard-interval coherent optical OFDM for 100-Gb/s long-haul WDM transmission," J. Lightw. Technol. 27, 3705-3713 (2009).

P. Poggiolini, A. Carena, V. Curri, F. Forghieri, "Evaluation of the computational effort for chromatic dispersion compensation in coherent optical PM-OFDM and PM-QAM systems," Opt. Exp. 17, 1385-1403 (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).

X. Liu, F. Buchali, R. W. Tkach, "Improving the nonlinear tolerance of polarization-division-multiplexed CO-OFDM in long-haul fiber transmission," J. Lightw. Technol. 27, 3632-3640 (2009).

2008

X. Liu, F. Buchali, "Intra-symbol frequency-domain averaging based channel estimation for coherent optical OFDM," Opt. Exp. 16, 21944-21957 (2008).

W. Shieh, H. Bao, Y. Tang, "Coherent optical OFDM: Theory and design," Opt. Exp. 16, 841-859 (2008).

H. Sun, K.-T. Wu, K. Roberts, "Real-time measurements of a 40 Gb/s coherent system," Opt. Exp. 16, 873-879 (2008).

S. L. Jansen, I. Morita, T. C. Schenk, H. Tanaka, "Long-haul transmission of 16$\,\times\,$52.5 Gbits/s polarization-division- multiplexed OFDM enabled by MIMO processing (Invited)," J. Opt. Netw. 7, 173-182 (2008).

2007

A. J. Lowery, "Fiber nonlinearity pre- and post-compensation for long-haul optical links using OFDM," Opt. Exp. 15, 12965 (2007).

Bell Labs Tech. J.

R. W. Tkach, "Scaling optical communications for the next decade and beyond," Bell Labs Tech. J. 14, 3-10 (2010).

IEEE Commun. Mag.

J. D'Ambrosia, "100 gagabit ethernet and beyond," IEEE Commun. Mag. 48, S6-S13 (2010).

P. J. Winzer, "Beyond 100G ethernet," IEEE Commun. Mag. 48, 26-30 (2010).

J. Lightw. Technol.

A. Sano, E. Yamada, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, Y. Miyamoto, R. Kudo, K. Ishihara, Y. Takatori, "No-guard-interval coherent optical OFDM for 100-Gb/s long-haul WDM transmission," J. Lightw. Technol. 27, 3705-3713 (2009).

X. Liu, F. Buchali, R. W. Tkach, "Improving the nonlinear tolerance of polarization-division-multiplexed CO-OFDM in long-haul fiber transmission," J. Lightw. Technol. 27, 3632-3640 (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).

J. Opt. Netw.

Opt. Exp.

X. Liu, F. Buchali, "Intra-symbol frequency-domain averaging based channel estimation for coherent optical OFDM," Opt. Exp. 16, 21944-21957 (2008).

H. Sun, K.-T. Wu, K. Roberts, "Real-time measurements of a 40 Gb/s coherent system," Opt. Exp. 16, 873-879 (2008).

A. J. Lowery, "Fiber nonlinearity pre- and post-compensation for long-haul optical links using OFDM," Opt. Exp. 15, 12965 (2007).

W. Shieh, H. Bao, Y. Tang, "Coherent optical OFDM: Theory and design," Opt. Exp. 16, 841-859 (2008).

P. Poggiolini, A. Carena, V. Curri, F. Forghieri, "Evaluation of the computational effort for chromatic dispersion compensation in coherent optical PM-OFDM and PM-QAM systems," Opt. Exp. 17, 1385-1403 (2009).

Other

A. R. Chraplyvy, "The coming capacity crunch," ECOC Plenary Talk (2009).

A. D. Ellis, F. C. G. Gunning, B. Cuenot, T. C. Healy, E. Pincemin, "Towards 1TbE using coherent WDM," Proc. OECC/ACOFT 2008 (2008).

Y. Ma, Q. Yang, Y. Tang, S. Chen, W. Shieh, "1-Tb/s per channel coherent optical OFDM transmission with subwavelength bandwidth access," Proc. OFC'09 .

R. Dischler, F. Buchali, "Transmission of 1.2 Tb/s continuous waveband PDM-OFDM-FDM signal with spectral efficiency of 3.3 bit/s/Hz over 400 km of SSMF," Proc. OFC'09 .

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," Proc. ECOC'09 .

A. H. Gnauck, P. J. Winzer, C. R. Doerr, L. L. Buhl, "10$\,\times\,$112-Gb/s PDM 16-QAM transmission over 630 km of fiber with 6.2-b/s/Hz spectral efficiency," Proc. OFC'09 .

H. Takahashi, "DWDM transmission with 7.0-bit/s/Hz spectral efficiency using 8$\,\times\,$65.1-Gb/s coherent PDM-OFDM signals," Proc. OFC'09 .

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, "64-Tb/s (640$\,\times\,$107-Gb/s) PDM-36QAM transmission over 320 km using both pre- and post-transmission digital equalization," Proc. OFC'10 .

A. Sano, "240-Gb/s polarization-multiplexed 64-QAM modulation and blind detection using PLC-LN hybrid integrated modulator and digital coherent receiver," Proc. ECOC'09 .

X. Liu, S. Chandrasekhar, B. Zhu, P. J. Winzer, A. H. Gnauck, D. W. Peckham, "Transmission of a 448-Gb/s reduced-guard-interval CO-OFDM signal with a 60-GHz optical bandwidth over 2000 km of ULAF and five 80-GHz-grid ROADMs," Proc. OFC'10 .

S. Oda, T. Tanimura, T. Hoshida, C. Ohshima, H. Nakashima, Z. Tao, J. C. Rasmussen, "112 Gb/s DP-QPSK transmission using a novel nonlinear compensator in digital coherent receiver," Proc. OFC'09 .

D. S. Millar, S. Makovejs, V. Mikhailov, R. I. Killey, P. Bayvel, S. J. Savory, "Experimental comparison of nonlinear compensation in long-haul PDM-QPSK transmission at 42.7 and 85.4 Gb/s," Proc. ECOC'09 .

ITU-T Recommendation G.975.1 (2004) Appendix I.9.

X. Liu, S. Chandrasekhar, B. Zhu, P. J. Winzer, D. W. Peckham, "7$\,\times\,$224-Gb/s WDM transmission of reduced-guard-interval CO-OFDM with 16-QAM subcarrier modulation on a 50-GHz Grid over 2000 km of ULAF and five ROADM passes," ECOC'10 Paper Tu.3.C.2.

http://cp.literature.agilent.com/litweb/pdf/5990-5512EN.pdf.

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