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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8808–8814

Heterodyne coherent detection of WDM PDM-QPSK signals with spectral efficiency of 4b/s/Hz

Xinying Li, Ze Dong, Jianjun Yu, Jianguo Yu, and Nan Chi  »View Author Affiliations

Optics Express, Vol. 21, Issue 7, pp. 8808-8814 (2013)

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We experimentally demonstrate heterodyne coherent detection of 8 × 112-Gb/s ultra-density wavelength-division-multiplexing (WDM) polarization-division-multiplexing quadrature-phase-shift-keying (PDM-QPSK) signal after 1120-km single-mode fiber-28 (SMF-28) transmission. The spectral efficiency (SE) is 4b/s/Hz. It is the first time to realize WDM signal transmission with high SE by adopting heterodyne coherent detection. At the heterodyne coherent receiver, intermediate frequency (IF) down conversion is realized in digital frequency domain after analog-to-digital conversion. A digital post filter and 1-bit maximum likelihood sequence estimation (MLSE) adopted after carrier phase estimation (CPE) in the conventional digital-signal-processing (DSP) process is used to suppress the enhanced noise and crosstalk as well as overcome the filtering effects. The bit-error ratio (BER) for all channels is under the forward-error-correction (FEC) limit of 3.8 × 10−3 after 1120-km SMF-28 transmission.

© 2013 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2840) Fiber optics and optical communications : Heterodyne

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 18, 2013
Revised Manuscript: March 22, 2013
Manuscript Accepted: March 23, 2013
Published: April 2, 2013

Xinying Li, Ze Dong, Jianjun Yu, Jianguo Yu, and Nan Chi, "Heterodyne coherent detection of WDM PDM-QPSK signals with spectral efficiency of 4b/s/Hz," Opt. Express 21, 8808-8814 (2013)

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  1. X. Zhou and J. Yu, “Multi-level, multi-dimensional coding for high-speed and high spectral-efficiency optical transmission,” J. Lightwave Technol.27(16), 3641–3653 (2009). [CrossRef]
  2. 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]
  3. S. Zhang, M. F. Huang, F. Yaman, E. Mateo, D. Qian, Y. Zhang, L. Xu, Y. Shao, I. Djordjevic, T. Wang, Y. Inada, T. Inoue, T. Ogata, and Y. Aoki, “40×117.6 Gb/s PDM-16QAM OFDM transmission over 10,181 km with soft-decision LDPC coding and nonlinearity compensation,” in Proc. OFC/NFOEC2012, Los Angeles, CA, paper PDP5C.4.
  4. C. Yu, P. Y. Kam, S. Zhang, and J. Chen, “Phase estimation in coherent optical fiber communication systems with advanced modulation formats,” in Proc. OFC/NFOEC2012, Los Angeles, CA, paper OTu2G.7.
  5. P. J. Winzer, A. H. Gnauck, C. R. Doerr, M. Magarini, and L. L. Buhl, “Spectrally efficient long-haul optical networking using 112-Gb/s polarization-multiplexed 16-QAM,” J. Lightwave Technol.28(4), 547–556 (2010). [CrossRef]
  6. J. Yu, X. Zhou, M. F. Huang, D. Qian, L. Xu, and P. Ji, “Transmission of hybrid 112 and 44 Gb/s PolMUX-QPSK in 25 GHz channel spacing over 1600 km SSMF employing digital coherent detection and EDFA-only amplification,” in Proc. OFC/NFOEC2009, San Diego, CA, paper OThR3.
  7. J. Yu, Z. Dong, H. C. Chien, Z. Jia, X. Li, D. Huo, M. Gunkel, P. Wagner, H. Mayer, and A. Schippel, “Transmission of 200 G PDM-CSRZ-QPSK and PDM-16 QAM with a SE of 4 b/s/Hz,” J. Lightwave Technol.31(4), 515–522 (2013). [CrossRef]
  8. X. Li, J. Yu, Z. Dong, H. C. Chien, Z. Jia, and N. Chi, “WDM transmission of 108.4-Gbaud PDM-QPSK signals (40 × 433.6-Gb/s) over 2800-km SMF-28 with EDFA-only,” Opt. Express20(26), B217–B222 (2012). [CrossRef] [PubMed]
  9. J. M. Kahn, A. M. Porter, and U. Padan, “Heterodyne detection of 310-Mb/s Quadriphase-Shift Keying using fourth-power optical phase-locked loop,” IEEE Photon. Technol. Lett.4(12), 1397–1400 (1992). [CrossRef]
  10. R. Zhu, K. Xu, Y. Zhang, Y. Li, J. Wu, X. Hong, and J. Lin, “QAM coherent subcarrier multiplexing system based on heterodyne detection using intermediate frequency carrier modulation,” in Proc. Of APMP, 165–168 (2008).
  11. M. Nakazawa, M. Yoshida, K. Kasai, and J. Hongou, “20 Msymbol/s, 64 and 128 QAM coherent optical transmission over 525 km using heterodyne detection with frequency-stabilized laser,” Electron. Lett.42(12), 710–712 (2006). [CrossRef]
  12. X. Li, J. Yu, N. Chi, Z. Dong, J. Zhang, and J. Yu, “The reduction of the LO number for heterodyne coherent detection,” Opt. Express20(28), 29613–29619 (2012). [CrossRef] [PubMed]
  13. J. Zhang, Z. Dong, J. Yu, N. Chi, L. Tao, X. Li, and Y. Shao, “Simplified coherent receiver with heterodyne detection of eight-channel 50 Gb/s PDM-QPSK WDM signal after 1040 km SMF-28 transmission,” Opt. Lett.37(19), 4050–4052 (2012). [CrossRef] [PubMed]
  14. Z. Dong, X. Li, J. Yu, and J. Yu, “Generation and transmission of 8 × 112-Gb/s WDM PDM-16QAM on a 25-GHz grid with simplified heterodyne detection,” Opt. Express21(2), 1773–1778 (2013). [CrossRef] [PubMed]
  15. ITU-T Recommendation G.975.1, “Forward error correction for high bit-rate DWDM submarine system,” 2004.
  16. J. G. Proakis, Digital Communications, 4th ed. (McGraw-Hill, New York, 2000).
  17. J. X. Cai, C. R. Davidson, A. Lucero, H. Zhang, D. G. Foursa, O. V. Sinkin, W. W. Patterson, A. N. Pilipetskii, G. Mohs, and N. S. Bergano, “20 Tbit/s transmission over 6860 km with sub-Nyquist channel spacing,” J. Lightwave Technol.30(4), 651–657 (2012). [CrossRef]
  18. J. Li, E. Tipsuwannakul, M. Karlsson, and P. A. Andrekson, “Low complexity duobinary signaling and detection for sensitivity improvement in Nyquist-WDM coherent system,” in Proc. OFC/NFOEC2012, Los Angeles, CA, paper OM3H.2.
  19. I. Lyubomirsky, “Quadrature duobinary for high-spectral efficiency 100G transmission,” J. Lightwave Technol.28(1), 91–96 (2010). [CrossRef]
  20. Z. Dong, J. Yu, Z. Jia, H. C. Chien, X. Li, and G. K. Chang, “7x224 Gb/s/ch Nyquist-WDM transmission over 1600-km SMF-28 using PDM-CSRZ-QPSK modulation,” IEEE Photon. Technol. Lett.24(13), 1157–1159 (2012). [CrossRef]
  21. H. C. Chien, J. Yu, Z. Jia, Z. Dong, and X. Xiao, “Performance assessment of noise-suppressed Nyquist-WDM for Terabit superchannel transmission,” J. Lightwave Technol.30(24), 3965–3971 (2012). [CrossRef]
  22. T. Gui, C. Li, Q. Yang, X. Xiao, L. Meng, C. Li, X. Yi, C. Jin, and Z. Li, “Auto bias control technique for optical OFDM transmitter with bias dithering,” Opt. Express21(5), 5833–5841 (2013). [CrossRef] [PubMed]

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