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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 5, Iss. 9 — Sep. 1, 2013
  • pp: 932–944

Proposal and Performance Evaluation of an Efficient RZ-DQPSK Modulation Scheme in All-Optical OFDM Transmission Systems

Seyed E. Mirnia, Arman Zarei, Siamak D. Emami, Sulaiman W. Harun, Hamzah Arof, Harith Ahmad, and Hossam M. H. Shalaby  »View Author Affiliations

Journal of Optical Communications and Networking, Vol. 5, Issue 9, pp. 932-944 (2013)

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A return-to-zero differential quadrature phase-shift keying (DQPSK) modulation scheme is proposed for all-optical orthogonal frequency-division multiplexing transmission systems. The system uses coupler-based inverse fast Fourier transform/fast Fourier transform to support a 700 km single-mode fiber link and a transmission rate of 40Gb/s without any nonlinear compensation. The performance of the proposed system is evaluated using simulation and four performance measures are obtained, namely, the eye diagram, the eye-opening penalty (EOP), the power spectral broadening, and the bit error rate (BER). The effect of self-phase modulation is taken into account in the performance evaluation. In addition, the performance of the proposed system is compared to that of a traditional one adopting a non-return-to-zero DQPSK scheme. Our results reveal that the proposed system outperforms the traditional one in all four aforementioned performance measures, yet the spectral efficiency is almost preserved. Specifically, for an input average power of 12 dBm, a reduction in both the required optical-signal-to-noise ratio of about 4 dB (to achieve a BER of 106) and the EOP of about 5 dB are reported when adopting the proposed system, as compared to the traditional one.

© 2013 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Research Papers

Original Manuscript: November 28, 2012
Revised Manuscript: April 24, 2013
Manuscript Accepted: June 25, 2013
Published: August 7, 2013

Seyed E. Mirnia, Arman Zarei, Siamak D. Emami, Sulaiman W. Harun, Hamzah Arof, Harith Ahmad, and Hossam M. H. Shalaby, "Proposal and Performance Evaluation of an Efficient RZ-DQPSK Modulation Scheme in All-Optical OFDM Transmission Systems," J. Opt. Commun. Netw. 5, 932-944 (2013)

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