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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 26 — Dec. 10, 2012
  • pp: B525–B534

Demonstration and performance investigation of all-optical OFDM systems based on arrayed waveguide gratings

Satoshi Shimizu, Gabriella Cincotti, and Naoya Wada  »View Author Affiliations

Optics Express, Vol. 20, Issue 26, pp. B525-B534 (2012)

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We experimentally demonstrate an 8 x 12.5 Gbit/s all-optical orthogonal frequency-division multiplexing (AO-OFDM) system using arrayed waveguide gratings (AWGs), which perform discrete Fourier transform (DFT) and inverse DFT (IDFT) of a signal directly in the optical domain. The experimental results show that frequency orthogonality of OFDM sub-channels is degraded in the AWG due to the slab-diffraction effect. To restore the frequency orthogonality and improve the system performance, we propose and demonstrate a waveform reshaping scheme, that improve the bit-error-rate (BER) from 10−4 to 10−6. We also experimentally investigate the influence of frequency mismatch between the OFDM signal and AWG at the receiver. The measured BER shows a serious degradation from 10−6 to 10−4 in case of ± 1.88 GHz frequency mismatch. To keep the BER under 10−5, the frequency mismatch should be smaller than ± 0.5 GHz ( ± 4% of the channel spacing).

© 2012 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(080.1238) Geometric optics : Array waveguide devices

ToC Category:
Subsystems for Optical Networks

Original Manuscript: October 1, 2012
Revised Manuscript: November 22, 2012
Manuscript Accepted: November 22, 2012
Published: December 4, 2012

Virtual Issues
European Conference on Optical Communication 2012 (2012) Optics Express

Satoshi Shimizu, Gabriella Cincotti, and Naoya Wada, "Demonstration and performance investigation of all-optical OFDM systems based on arrayed waveguide gratings," Opt. Express 20, B525-B534 (2012)

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