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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 19520–19534

OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers

Zhenhua Dong, Alan Pak Tao Lau, and Chao Lu  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 19520-19534 (2012)

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OSNR monitoring is indispensable for coherent systems to ensure robust, reliable network operation and potentially enable impairment-aware routing for future dynamic optical networks. In a long-haul transmission link with chromatic dispersion (CD) and fiber nonlinearity, it is difficult to distinguish between amplifier noise and fiber nonlinearity induced distortions from received signal distributions even after various transmission impairment compensation techniques, thus resulting in grossly inaccurate OSNR estimates. Based on the received signal distributions after carrier phase estimation (CPE), we propose to characterize the nonlinearity-induced amplitude noise correlation across neighboring symbols and incorporate such information into error vector magnitude (EVM) calculation to realize fiber nonlinearity-insensitive OSNR monitoring. For a transmission link up to 1600 km and signal launched power up to 2 dBm, experimental results for 112 Gb/s polarization-multiplexed quadrature phase-shift keying (PM-QPSK) demonstrate an OSNR monitoring range of 10-24 dB with a maximum estimation error below 1 dB. For 224 Gb/s PM-16-quadrature amplitude modulation (PM-16-QAM) systems, simulation results demonstrate an OSNR monitoring range of 18-28 dB with a maximum estimation error below 1 dB. Tolerance of the proposed OSNR monitoring technique to different pulse shapes, timing phase offsets, polarization dependent loss (PDL), polarization-mode dispersion (PMD) and WDM effects are also investigated through simulations.

© 2012 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(060.4261) Fiber optics and optical communications : Networks, protection and restoration

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 19, 2012
Revised Manuscript: August 4, 2012
Manuscript Accepted: August 4, 2012
Published: August 10, 2012

Zhenhua Dong, Alan Pak Tao Lau, and Chao Lu, "OSNR monitoring for QPSK and 16-QAM systems in presence of fiber nonlinearities for digital coherent receivers," Opt. Express 20, 19520-19534 (2012)

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  1. D. C. Kilper, S. Chandrasekhar, L. Buhl, A. Agarwal, and D. Maywar, “Spectral monitoring of OSNR in high speed networks,” in European Conference and Exhibition on Optical Communication (ECOC), 2002, paper 7.4.4.
  2. J. H. Lee, D. K. Jung, C. H. Kim, and Y. C. Chung, “OSNR monitoring technique using polarization nulling method,” IEEE Photon. Technol. Lett.13(1), 88–90 (2001). [CrossRef]
  3. S. D. Dods and T. B. Anderson, “Optical performance monitoring technique using delay tap asynchronous waveform sampling,” in Proc. OFC’06, Anaheim, California, Mar. 2006, Paper OThP5.
  4. J. A. Jargon, X. Wu, and A. E. Willner, “Optical performance monitoring using artificial neural networks trained with eye-diagram parameters,” IEEE Photon. Technol. Lett.21(1), 54–56 (2009). [CrossRef]
  5. E. Ip, A. P. T. Lau, D. J. F. Barros, and J. M. Kahn, “Coherent detection in optical fiber systems,” Opt. Express16(2), 753–791 (2008). [CrossRef] [PubMed]
  6. S. J. Savory, “Digital coherent optical receivers: Algorithms and subsystems,” IEEE J. Sel. Top. Quantum Electron.16(5), 1164–1179 (2010). [CrossRef]
  7. S. L. Woodward, L. E. Nelson, M. D. Feuer, X. Zhou, P. D. Magill, S. Foo, D. Hanson, H. Sun, M. Moyer, and M. O’Sullivan, “Characterization of real-time PMD and chromatic dispersion monitoring in a high-PMD 46-Gb/s transmission system,” IEEE Photon. Technol. Lett.20(24), 2048–2050 (2008). [CrossRef]
  8. F. N. Hauske, M. Kuschnerov, B. Spinnler, and B. Lankl, “Optical performance monitoring in digital coherent receivers,” J. Lightwave Technol.27(16), 3623–3631 (2009). [CrossRef]
  9. F. Pittalà, F. N. Hauske, Y. Ye, N. G. Gonzalez, and I. T. Monroy, “Joint PDL and in-band OSNR monitoring supported by data-aided channel estimation,” in Proc. OFC’12, Los Angeles, Mar. 2012, Paper OW4G.
  10. D. J. Ives, B. C. Thomsen, R. Maher, and S. Savory, “Estimating OSNR of equalised QPSK signals,” in Proc. European Conference and Exhibition on Optical Communication (ECOC), 2011, Paper Tu.6.A.6.
  11. R. Schmogrow, B. Nebendahl, M. Winter, A. Josten, D. Hillerkuss, S. Koenig, J. Meyer, M. Dreschmann, M. Huebner, C. Koos, J. Becker, W. Freude, and J. Leuthold, “Error vector magnitude as a performance measure for advanced modulation formats,” IEEE Photon. Technol. Lett.24(1), 61–63 (2012). [CrossRef]
  12. M. Mayrock and H. Haunstein, “Optical monitoring for non-linearity identification in CO-OFDM transmission systems,” in Proc. OFC’08, San Diego, CA, Feb. 2008, Paper JThA58.
  13. E. Ip, “Nonlinear compensation using backpropagation for polarization-multiplexed transmission,” J. Lightwave Technol.28(6), 939–951 (2010). [CrossRef]
  14. Z. H. Dong, A. P. T. Lau, and C. Lu, “OSNR monitoring for PM-QPSK systems in presence of fiber nonlinearities for digital coherent receivers,” in Proc. Optoelectronic Communication Conference (OECC), 2012, Paper 6B3–3.
  15. J. Renaudier, G. Charlet, O. Bertran-Pardo, H. Mardoyan, P. Tran, M. Salsi, and S. Bigo, “Transmission of 100 Gb/s Coherent PDM-QPSK over 16 x 100 km of Standard Fiber with allerbium amplifiers,” Opt. Express17(7), 5112–5119 (2009). [CrossRef] [PubMed]
  16. A. H. Gnauck, P. J. Winzer, S. Chandrasekhar, X. Liu, B. Zhu, and D. W. Peckham, “Spectrally efficient long-haul WDM transmission using 224-Gb/s polarization-multiplexed 16-QAM,” J. Lightwave Technol.29(4), 373–377 (2011). [CrossRef]
  17. P. Poggiolini, A. Carena, V. Curri, G. Bosco, and F. Forghieri, “Analytical modeling of nonlinear propagation in uncompensated optical transmission links,” IEEE Photon. Technol. Lett.23(11), 742–744 (2011). [CrossRef]
  18. F. Vacondio, O. Rival, C. Simonneau, E. Grellier, A. Bononi, L. Lorcy, J. C. Antona, and S. Bigo, “On nonlinear distortions of highly dispersive optical coherent systems,” Opt. Express20(2), 1022–1032 (2012). [CrossRef] [PubMed]
  19. A. Bononi, P. Serena, N. Rossi, and D. Sperti, “Which is the dominant nonlinearity in long-haul PDM-QPSK coherent transmissions?” in European Conference and Exhibition on Optical Communication (ECOC), 2010, Th.10.E.1.
  20. A. Bononi, N. Rossi, and P. Serena, “Transmission limitations due to fiber nonlinearity,” in Proc. OFC’11, Los Angeles, Mar. 2011, Paper OWO7.
  21. A. P. T. Lau, S. Rabbani, and J. M. Kahn, “On the statistics of intra-channel four-wave mixing in phase-modulated optical communication systems,” J. Lightwave Technol.26(14), 2128–2135 (2008). [CrossRef]
  22. 22. Optical Monitoring for DWDM Systems. ITU-T recommendation G.697, June 2004.
  23. VPIsystemsTM, “VPltransmissionMakerTM”.
  24. X. Zhou, J. Yu, and P. D. Magill, “Cascaded two-modulus algorithm for blind polarization de-multiplexing of 114-Gb/s PDM-8-QAM optical signals,” in Proc. OFC’09, San Diego, Mar. 2009, Paper OWG3.
  25. Y. L. Gao, A. P. T. Lau, S. Y. Yan, and C. Lu, “Low-complexity and phase noise tolerant carrier phase estimation for dual-polarization 16-QAM systems,” Opt. Express19(22), 21717–21729 (2011). [CrossRef] [PubMed]
  26. O. Vassilieva, T. Hoshida, X. Wang, J. Rasmussen, H. Miyata, and T. Naito, “Impact of polarization dependent loss and cross-phase modulation on polarization multiplexed DQPSK signals,” in Proc. OFC’08, San Diego, CA, Feb. 2008, Paper OThU6.

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