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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 11 — Jun. 2, 2014
  • pp: 13043–13049

Energy-efficient optical network units for OFDM PON based on time-domain interleaved OFDM technique

Xiaofeng Hu, Pan Cao, Liang Zhang, Lipeng Jiang, and Yikai Su  »View Author Affiliations

Optics Express, Vol. 22, Issue 11, pp. 13043-13049 (2014)

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We propose and experimentally demonstrate a new scheme to reduce the energy consumption of optical network units (ONUs) in orthogonal frequency division multiplexing passive optical networks (OFDM PONs) by using time-domain interleaved OFDM (TI-OFDM) technique. In a conventional OFDM PON, each ONU has to process the complete downstream broadcast OFDM signal with a high sampling rate and a large FFT size to retrieve its required data, even if it employs a portion of OFDM subcarriers. However, in our scheme, the ONU only needs to sample and process one data group from the downlink TI-OFDM signal, effectively reducing the sampling rate and the FFT size of the ONU. Thus, the energy efficiency of ONUs in OFDM PONs can be greatly improved. A proof-of-concept experiment is conducted to verify the feasibility of the proposed scheme. Compared to the conventional OFDM PON, our proposal can save 17.1% and 26.7% energy consumption of ONUs by halving and quartering the sampling rate and the FFT size of ONUs with the use of the TI-OFDM technology.

© 2014 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4250) Fiber optics and optical communications : Networks

ToC Category:
Optical Communications

Original Manuscript: January 21, 2014
Revised Manuscript: March 5, 2014
Manuscript Accepted: March 5, 2014
Published: May 22, 2014

Xiaofeng Hu, Pan Cao, Liang Zhang, Lipeng Jiang, and Yikai Su, "Energy-efficient optical network units for OFDM PON based on time-domain interleaved OFDM technique," Opt. Express 22, 13043-13049 (2014)

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