Abstract

We report on the experimental demonstration of single channel 28 Gbaud QPSK and 16-QAM zero-guard-interval (ZGI) CO-OFDM transmission with only 1.34% overhead for OFDM processing. The achieved transmission distance is 5120 km for QPSK assuming a 7% forward error correction (FEC) overhead, and 1280 km for 16-QAM assuming a 20% FEC overhead. We also demonstrate the improved tolerance of ZGI CO-OFDM to residual inter-symbol interference compared to reduced-guard-interval (RGI) CO-OFDM. In addition, we report an 8-channel wavelength-division multiplexing (WDM) transmission of 28 Gbaud QPSK ZGI CO-OFDM signals over 4160 km.

© 2012 OSA

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References

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2011

2010

P. Winzer, “Beyond 100G Ethernet,” IEEE Commun. Mag.48(7), 26–30 (2010).
[CrossRef]

2009

2008

1997

T. M. Schmidl and D. C. Cox, “Robust frequency and timing synchronization for OFDM,” IEEE Trans. Commun.45(12), 1613–1621 (1997).
[CrossRef]

Buchali, F.

Chandrasekhar, S.

Chen, C.

Cox, D. C.

T. M. Schmidl and D. C. Cox, “Robust frequency and timing synchronization for OFDM,” IEEE Trans. Commun.45(12), 1613–1621 (1997).
[CrossRef]

Gnauck, A. H.

Jansen, S. L.

Liu, X.

Ma, Y.

Morita, I.

Peckham, D. W.

Plant, D. V.

Schenk, T. C. W.

Schmidl, T. M.

T. M. Schmidl and D. C. Cox, “Robust frequency and timing synchronization for OFDM,” IEEE Trans. Commun.45(12), 1613–1621 (1997).
[CrossRef]

Shieh, W.

Tanaka, H.

Winzer, P.

P. Winzer, “Beyond 100G Ethernet,” IEEE Commun. Mag.48(7), 26–30 (2010).
[CrossRef]

Winzer, P. J.

Yang, Q.

Yi, X.

Zhu, B.

Zhuge, Q.

IEEE Commun. Mag.

P. Winzer, “Beyond 100G Ethernet,” IEEE Commun. Mag.48(7), 26–30 (2010).
[CrossRef]

IEEE Trans. Commun.

T. M. Schmidl and D. C. Cox, “Robust frequency and timing synchronization for OFDM,” IEEE Trans. Commun.45(12), 1613–1621 (1997).
[CrossRef]

J. Lightwave Technol.

J. Opt. Netw.

Opt. Express

Other

Q. Zhuge, M. Morsy-Osman, M. E. Mousa-Pasandi, X. Xu, M. Chagnon, Z. A. El-Sahn, C. Chen, and D. V. Plant, “Experimental demonstration of 28 Gbaud QPSK and 16-QAM zero-guard-interval CO-OFDM transmissions,” in Proc. ECOC'12, Paper. Tu.4.C.2.

X. Liu, S. Chandrasekhar, P. J. Winzer, S. Draving, J. Evangelista, N. Hoffman, B. Zhu, and D. W. Peckham, “Single coherent detection of a 606-Gb/s CO-OFDM signal with 32-QAM subcarrier modulation using 4x80-Gsamples/s ADCs,” in Proc. ECOC'10, Paper. PD2.6.

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Figures (6)

Fig. 1
Fig. 1

(a) Transmitted ZGI CO-OFDM frame. (b) Block diagram of ZGI CO-OFDM receiver.

Fig. 2
Fig. 2

Experimental setup. ECL: external cavity laser. PC: polarization controller. PBS/PBC: polarization beam splitter/combiner. ODL: optical delay line. SW: switch.

Fig. 3
Fig. 3

Measured BER vs. OSNR (0.1nm) for (a) QPSK and (b) 16-QAM signals.

Fig. 4
Fig. 4

Measured BER vs. transmission distance for (a) 28 Gbaud QPSK and (b) 16-QAM signals.

Fig. 5
Fig. 5

Measured Q-factor penalty vs. (a) residual CD and (b) time offset. QPSK: 5120 km. 16-QAM: 1280 km.

Fig. 6
Fig. 6

(a) The transmitter for the WDM transmission. IL: interleaver. (b) The spectrum of the generated 8-channel WDM signal. (c) The BER performance of all channels.

Tables (1)

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Table 1 Comparison of the CP overhead

Equations (1)

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H new 1 = H old 1 H FDI 1

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