Abstract

Fiber transmission of optical differential 8-level phase-shift keying (OD8PSK) signals is demonstrated for the first time. Co-polarized 8 WDM channels of 10 Giga-symbol/s or 30 Gb/s return-to-zero (RZ) OD8PSK signals with a channel spacing of 50 GHz were transmitted over 320 km of standard single mode fiber (SSMF) with an EDFA spacing of 80 km. The BER of the worst WDM channel after transmission of 320 km was 2.3×10-5.

© 2005 Optical Society of America

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References

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  1. R. A. Griffin and A. C. Carter, �??Optical differential quadrature phase-shift key (oDQPSK) for high capacity optical transmission, �?? in Optical Fiber Communications Conference (Institute of Electrical and Electronics Engineers, Piscataway, N.J., 2002), Paper WX6
    [CrossRef]
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    [CrossRef]
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  9. H. Kim and R.-J. Essiambre, �??Transmission of 8 �? 20 Gb/s DQPSK signals over 310-km SMF with 0.8- b/s/Hz spectral efficiency,�?? IEEE Photon. Technol. Lett. 15, 769-771 (2003)
    [CrossRef]
  10. X. Liu, C. Xu, and X. Wei, �??Performance Analysis of Time�??Polarization Multiplexed 40-Gb/s RZ-DPSK DWDM Transmission,�?? IEEE Photon. Technol. Lett. 16, 302-304 (2004)

ECOC 2003

S. Hayase, N. Kikuchi, K. Sekein, and S. Sasaki, �??Proposal of 8-state per symbol (binary ASK and QPSK) 30-Gbit/s optical modulation/demodulation scheme,�?? in European Conference on Optical Communication (The Institute of Electrical Engineers, London, United Kingdom, 2003), Paper TH2.6.4

Electron. Lett.

Y. Han, C. Kim, and G. Li, �??Simplified receiver implementation for optical differential 8-level phase-shift keying,�?? Electron. Lett. 40, 1372-1373 (2004)
[CrossRef]

IEEE Photon. Technol. Lett.

P. S. Cho, V. S. Grigoryan, Y. A. Godin, A. Salamon, and Y. Achiam, �??Transmission of 25-Gb/s RZDQPSK signals with 25-GHz channel spacing over 1000 km of SMF-28 fiber,�?? IEEE Photon. Technol. Lett. 15, 473-475 (2003).
[CrossRef]

H. Kim and R.-J. Essiambre, �??Transmission of 8 �? 20 Gb/s DQPSK signals over 310-km SMF with 0.8- b/s/Hz spectral efficiency,�?? IEEE Photon. Technol. Lett. 15, 769-771 (2003)
[CrossRef]

X. Liu, C. Xu, and X. Wei, �??Performance Analysis of Time�??Polarization Multiplexed 40-Gb/s RZ-DPSK DWDM Transmission,�?? IEEE Photon. Technol. Lett. 16, 302-304 (2004)

J. Lightwave Technol.

OFC 2002

R. A. Griffin and A. C. Carter, �??Optical differential quadrature phase-shift key (oDQPSK) for high capacity optical transmission, �?? in Optical Fiber Communications Conference (Institute of Electrical and Electronics Engineers, Piscataway, N.J., 2002), Paper WX6
[CrossRef]

OFC 2005

N. Yoshikane and I Morita, �??1.14 b/s/Hz spectrally-efficient 50 �? 85.4 Gb/s transmission over 300 km using copolarized CS-RZ DQPSK signals,�?? in Optical Fiber Communications Conference (Institute of Electrical and Electronics Engineers, Piscataway, N.J., 2005), Paper PDP38.

Opt. Express

Optic. Express

H. Yoon, D. Lee, and N. Park, �??Performance comparison of optical 8-ary differential phase-shift keying systems with different electrical decision schemes,�?? Optic. Express 13, 371-376 (2005), <a href= "http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-2-371">http://www.opticsexpress.org/abstract.cfm?URI=OPEX-13-2-371</a>
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Experimental setup: Detailed schematic diagrams of (a) OD8PSK transmission system (PC-DCF: Pre-dispersion compensation, BPF: optical bandpass filter, ED: error detector), (b) OD8PSK transmitter, (c) Fiber spans, and (d) OD8PSK receiver.

Fig. 2.
Fig. 2.

(a) Back-to-back demodulated eye diagram (10 ps/div.), (b) Back-to-back BER as a function of optical power, and (c) Back-to-back BER as a function of total chromatic dispersion for single channel OD8PSK.

Fig. 3.
Fig. 3.

Measured demodulated eye diagrams (20 ps/div.) (a) Back-to-back and (b) after transmission of 320 km

Fig. 4.
Fig. 4.

Measured BER as a function of transmission distance

Fig. 5.
Fig. 5.

(a) Measured BERs and (b) optical spectrum (wavelength resolution: 0.01 nm) of all 8 WDM channels after transmission of 320 km

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